Units B5 C5 P5
th
Exam date: 25 June - pm
– Past exam questions
H
GENERAL CERTIFICATE OF SECONDARY EDUCATION
A216/02
TWENTY FIRST CENTURY SCIENCE
ADDITIONAL SCIENCE A
Unit 2 Modules B5 C5 P5
(Higher Tier)
*CUP/T63225*
Friday 23 January 2009
Morning
Candidates answer on the question paper
A calculator may be used for this paper
OCR Supplied Materials:
None
Duration: 40 minutes
Other Materials Required:
•
Pencil
•
Ruler (cm/mm)
*
A
2
1
6
0
2
*
INSTRUCTIONS TO CANDIDATES
•
•
•
•
•
•
Write your name clearly in capital letters, your Centre Number and
Candidate Number in the boxes above.
Use black ink. Pencil may be used for graphs and diagrams only.
Read each question carefully and make sure that you know what you have
to do before starting your answer.
Answer all the questions.
Do not write in the bar codes.
Write your answer to each question in the space provided, however
additional paper may be used if necessary.
INFORMATION FOR CANDIDATES
•
•
•
•
•
The number of marks is given in brackets [ ] at the end of each question or
part question.
The total number of marks for this paper is 42.
A list of physics equations is printed on page 2.
The Periodic Table is printed on the back page.
This document consists of 20 pages. Any blank pages are indicated.
© OCR 2009 [D/103/3775]
SPA (NH/TC) T63225/3
FOR EXAMINER’S USE
1
4
2
5
3
5
4
5
5
4
6
5
7
4
8
4
9
3
10
3
TOTAL
42
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2
TWENTY FIRST CENTURY SCIENCE EQUATIONS
Useful Relationships
Explaining Motion
speed = distance travelled
time taken
momentum = mass × velocity
change of momentum = resultant force × time for which it acts
work done by a force = force × distance moved by the force
change in energy = work done
change in GPE = weight × vertical height difference
kinetic energy =
1
2
× mass × [velocity]2
Electric Circuits
resistance = voltage
current
Vp Np
=
Vs Ns
energy transferred = power × time
power = potential difference × current
efficiency =
energy usefully transferred
× 100%
total energy supplied
The Wave Model of Radiation
wave speed = frequency × wavelength
© OCR 2009
3
Answer all the questions.
1
Mary draws some chemical structures A, B, C, D and E.
A
B
C
D
E
(a) Which structure, A, B, C, D or E, is most likely to contain a chain of carbon atoms?
answer ........................... [1]
(b) Which structure, A, B, C, D or E, will have the lowest boiling point?
answer ........................... [1]
(c) Which structure, A, B, C, D or E, is part of a covalent giant structure?
answer ........................... [1]
(d) Which structure, A, B, C, D or E, is part of an ionic giant structure?
answer ........................... [1]
[Total: 4]
© OCR 2009
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4
2
Henry draws a table of some of the elements that might be in his body.
(a) Some of the elements in this table are very common in his body.
Others are only present in smaller amounts.
Put a tick (✓) in each row of the table to show how common each element is in his body.
element
very common
smaller amounts
carbon
hydrogen
nitrogen
oxygen
phosphorus
sulfur
[2]
© OCR 2009
5
(b) One type of compound is called an amino acid.
There are different ways of writing the formula of an amino acid.
amino acid
A
B
simplified structural
formula
CH3
|
NH2—CH—COOH
|
NH2—CH—COOH
C
CH2SH
|
NH2—CH—COOH
D
CH2COOH
|
NH2—CH—COOH
molecular formula
C3H7O2N
C2H5O2N
C4H7O4N
(i)
Complete the simplified structural formula of acid B in its box.
[1]
(ii)
Write the molecular formula of acid C in its box.
[1]
(iii)
Rotting hair smells of hydrogen sulfide, the smell of bad eggs.
The hydrogen sulfide comes from one of the amino acids A, B, C or D in the table.
Which one?
answer................... [1]
[Total: 5]
© OCR 2009
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6
3
Electric wires are usually made of copper because copper is a good electrical conductor.
(a) How is electricity conducted through copper?
Put a tick (✓) in the box next to the best answer.
Anions move to the anode, cations to the cathode.
Positive ions move through the lattice.
Electrons move between ions in the lattice.
Electrons move between atoms in the lattice.
Atoms vibrate within the lattice.
[1]
(b) Copper is extracted from its ore using a blast furnace.
The blast furnace melts all the reactants and allows them to react.
One reaction that takes place is that of molten copper sulfide with molten copper oxide to
produce molten copper and sulfur dioxide gas.
Complete the reaction by putting state symbols into the brackets.
Cu2S [......]
+
2Cu2O [......]
6Cu [......]
+
SO2 [......]
[1]
(c) Another of the reactions that takes place is
2Cu2S +
O2
Complete the boxes to balance the equation.
© OCR 2009
Cu2O
+
SO2
[1]
7
(d) The cable connecting a TV to a DVD player sometimes has gold plated contacts.
There are two different reasons why the gold is used for contacts.
Put ticks (✓) in the boxes next to the two best reasons why gold is used for contacts.
Gold bends easily.
Gold is a very unreactive metal.
Gold is the same colour as copper.
Gold is a rare metal.
Gold can be plated very thinly.
Gold holds its outer electrons quite weakly.
[2]
[Total: 5]
© OCR 2009
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8
4
Geoff builds this circuit.
(a) The lamp only lights when the switch is closed.
Put a tick (✓) in the box next to the correct reason.
The open switch has a very low resistance.
The switch is connected in parallel with the resistor.
The closed switch allows the battery to make a voltage.
The closed switch allows charge to flow through the lamp.
[1]
(b) Complete the sentences below.
Choose words from this list.
current
moving
oscillating
power
stationary
voltage
The lamp gets hotter when it has an electric .............................. passing through it.
This is caused by collisions between .............................. electrons and .............................. atoms.
[2]
(c) Geoff’s circuit has a resistance of 3.0 Ω and a current of 1.5 A.
How should Geoff calculate the voltage of the battery?
Put a ring around the answer.
3.0
1.5
© OCR 2009
3.0 × 1.5
1.5
3.0
[1]
9
(d) Why is there a resistor in the circuit?
Put a tick (✓) in the box next to the correct reason.
The resistor keeps the current in the lamp at the correct value.
The lamp needs more current than the battery can supply on its own.
The battery doesn’t have a big enough voltage to make the lamp light.
The resistor stops the voltage from reaching the switch, making it safe to touch.
[1]
[Total: 5]
© OCR 2009
Turn over
10
5
Lucinda reads her electricity meter.
1000
amp / kWh
(a) Why is the energy transfer measured in kilowatt-hours instead of joules?
Put a tick (✓) in the box next to the best reason.
The joule is a very small amount of energy.
It tells you how much electricity is being used moment by moment.
Each type of energy transfer has its own special unit of measurement.
The meter design can’t be adapted to measure energy transfers in joules.
[1]
(b) Lucinda uses her 2.1 kW heater for 3 hours. Each kilowatt-hour costs 8p.
(i)
What is the correct way of calculating how many pence it costs to use the heater?
Put a ring around the answer.
2.1 x 3 x 8
© OCR 2009
2.1 x 8
3
3 x8
2.1
[1]
A216/02
Mark Scheme
January 2009
A216/02 Modules B5, C5, P5 Higher
Question
1
(a)
(s)
(d)
(f)
2
Expected Answers
Marks
1
1
1
1
Total
4
B (1)
A (1)
D (1)
E (1)
(a)
element
carbon
hydrogen
nitrogen
oxygen
phosphorus
sulfur
(b)
very
common
smaller
amounts
2
accept nitrogen in either column (so ignore nitrogen row)
do not allow any other response which appears in both columns
9
9
9
9
remaining 5 rows correct = 2 marks
4 correct = 1 mark
3 or less correct scores = 0 marks
9
9
(i)
'H' approximately above the vertical line (1)
1
(ii)
C 3 H 7 O 2 NS (1)
1
(iii)
C (1)
1
Total
Rationale
if answer line blank, accept any clear indication of correct letter
if answer line blank, accept any clear indication of correct letter
if answer line blank, accept any clear indication of correct letter
if answer line blank, accept any clear indication of correct
5
23
OR (ignoring Nitrogen line)
no errors = 2 marks
1 error = 1 mark
2 or more errors = 0 marks
the ‘H’ must be a capital letter
allow ‘H1’ but not ‘H1’
do not allow alterations elsewhere in the formula
numbers MUST be either smaller or subscripted
allow elements in any order so long as their subscripts are correct
accept C 3 H 7 O 2 N 1 S 1 (reject C 3 H 7 O 2 N1S1)
the subscripts on N 1 and S 1 are not normally used, but are not
incorrect, so the mark can be awarded
accept any clear indication of box C
A216/02
Mark Scheme
Question
3 (a)
Expected Answers
Marks
1
January 2009
Rationale
electrons move between ions
9 (1)
in the lattice
(b)
[l], [l], [l], [g]
1
(c)
(d)
3, 2, 2
1
2
Gold is less reactive than copper.
9
(1)
Gold holds its outer electrons quite
weakly.
9
(1)
Total
5
24
accept upper case letters, do not accept words (eg “gas”, “liquid”,
“liq”)
boxes must contain numbers only
if answer line blank, accept any clear indication of correct letter
if only 2 responses given, and one or both is then crossed out, mark
both responses
A216/02
Mark Scheme
Question
4 (a)
Expected Answers
The closed switch allows charge to
flow through the lamp
(b)
(c)
(d)
current (1)
moving
Marks
1
stationary (1)
3.0 × 1.5 (1)
1
1
Total
Rationale
9 (1)
2
the resistor keeps the current in the
lamp at the correct value
January 2009
9 (1)
5
25
first line correct = 1 mark
second line correct = 1 mark
allow oscillating instead of stationary
A216/02
Mark Scheme
Question
5 (a)
Expected Answers
The joule is a very small amount of
energy
(b)
(c)
(i)
(ii)
Marks
1
January 2009
Rationale
9 (1)
2.1 x 3 x 8 (1)
Alan (1)
1
1
accept “50.4” if response not clear
if answer line blank, accept any clear indication
allow 6 x 100 instead of ‘Alan’
2.1x3
charge (1)
1
if answer line blank, accept any clear indication of correct letter
Total
4
26
A216/02
Mark Scheme
Question
6 (a)
(b)
Expected Answers
0.36 W (1)
decrease
increase
stays
the same
Marks
1
1
both rows correct = 1 mark
Rationale
1
both lines correct = 1 mark
2
both ticks correct = 2 marks
one correct = 1 mark
9
9
(c)
(i)
decrease
increase
stays
the same
9
9
(ii)
Both resistors have the same
potential difference across them
9
(1)
both resistors have the same
current
9
(1)
Total
if more than two ticks:
(6 rows correct = 2 marks)
5 rows correct = 1 mark
4 rows correct = 0
5
27
January 2009
A216/02
Mark Scheme
Question
7 (a)
Expected Answers
Marks
2
mitosis
meiosis
A
D
E
B
C
D
C
Total
Rationale
allow any order of responses within a column
do not mark any letter which appears in both columns
all correct = 2 marks
4 or 3 correct = 1 mark
1 or 2 correct = 0 marks
2
B
January 2009
A
4
28
D anywhere before C = 1 mark
C anywhere before A = 1 mark
repeated letters apply strictly as above, e.g. ACA = 1 mark
A216/02
Question
8 (a)
Mark Scheme
Expected Answers
statement
four bases
order not
important
DNA in
cytoplasm
bases pair up
differently
copy of DNA
into cytoplasm
order of bases
determines
amino acid
order
true
false
9
Rationale
accept any unambiguous response
9
all correct =-3 marks
5 or 4 rows correct = 2 marks
3 or 2 rows correct = 1 mark
1 row correct = 0 marks
9
or
9
all correct = 3 marks
1 or 2 errors = 2 marks
3 or 4 errors = 1 mark
5 or 6 errors = 0 marks
9
9
1
(b)
TAAGCCTGT
Question
9
Marks
3
January 2009
9 (1)
Total
4
Expected Answers
Marks
3
meristems (1)
auxins (1)
clones (1)
Total
3
29
Rationale
must be in correct order
A216/02
Question
10
Mark Scheme
Expected Answers
Marks
3
Up to the eight cell stage …
9
Specialised cells can …
9
Some genes in the nucleus … 9
Both embryonic and adult …
Total
9
3
30
January 2009
Rationale
7 or 6 correct = 3 marks
5 or 4 correct = 2 marks
3 correct = 1 mark
2 or 1 correct = 0 marks
H
GENERAL CERTIFICATE OF SECONDARY EDUCATION
A216/02
TWENTY FIRST CENTURY SCIENCE
ADDITIONAL SCIENCE A
Unit 2: Modules B5 C5 P5
(Higher Tier)
* O C E / 1 1 0 9 3 *
Wednesday 24 June 2009
Morning
Candidates answer on the question paper
A calculator may be used for this paper
OCR Supplied Materials:
None
Duration: 40 minutes
Other Materials Required:
•
Pencil
•
Ruler (cm/mm)
*
A
2
1
6
0
2
*
INSTRUCTIONS TO CANDIDATES
•
•
•
•
•
•
Write your name clearly in capital letters, your Centre Number and Candidate Number in the boxes above.
Use black ink. Pencil may be used for graphs and diagrams only.
Read each question carefully and make sure that you know what you have to do before starting your answer.
Answer all the questions.
Do not write in the bar codes.
Write your answer to each question in the space provided, however additional paper may be used if
necessary.
INFORMATION FOR CANDIDATES
•
•
•
•
•
The number of marks is given in brackets [ ] at the end of each question or part question.
The total number of marks for this paper is 42.
A list of physics equations is printed on page 2.
The Periodic Table is printed on the back page.
This document consists of 20 pages. Any blank pages are indicated.
© OCR 2009 [D/103/3775]
DC (SJH/CGW) 11093/7
OCR is an exempt Charity
Turn over
2
TWENTY FIRST CENTURY SCIENCE EQUATIONS
Useful Relationships
Explaining Motion
speed =
distance travelled
time taken
momentum = mass × velocity
change of momentum = resultant force × time for which it acts
work done by a force = force × distance moved by the force
change in energy = work done
change in GPE = weight × vertical height difference
1
kinetic energy = 2 × mass × [velocity]2
Electric Circuits
resistance =
Vp
Vs
=
voltage
current
Np
Ns
energy transferred = power × time
power = potential difference × current
efficiency =
energy usefully transferred
× 100%
total energy supplied
The Wave Model of Radiation
wave speed = frequency × wavelength
© OCR 2009
3
BLANK PAGE
Question 1 starts on page 4.
PLEASE DO NOT WRITE ON THIS PAGE
© OCR 2009
Turn over
4
Answer all the questions.
1
Erupting volcanoes give out a mixture of gases.
(a) Some of the gases from a volcano are sulfur compounds.
Mary asks her friends if sulfur is in living things.
Su
Living things
don’t contain
sulfur.
Jim
Living things
contain small
amounts of
sulfur.
Mike
Living things
contain large
amounts of
sulfur.
Kate
Living things only
contain sulfur if
they have been
poisoned.
Who gives the best answer?
answer ........................................................... [1]
© OCR 2009
5
(b) Sulfur dioxide is just one of the sulfur compounds emitted by volcanoes.
Sulfur dioxide is made of small SO2 molecules.
Put a ring around each of the correct terms in this passage.
The atoms in sulfur dioxide molecules are held together by
bonding.
These bonds are formed when electrons are
atoms.
shared
ionic
covalent
metallic
totally transferred
between
The bonds between the atoms in a sulfur dioxide molecule are
Each nucleus is attracted to
another nucleus
strong
weak.
the electrons in between.
[2]
(c) Mary knows that sulfur compounds move between the atmosphere and the lithosphere in a
cycle. She uses the information in the statements below to draw a sulfur cycle.
A
Sulfur compounds in sediments are taken up by plants.
B
Sulfur compounds get into the air from erupting volcanoes.
C
Sulfur compounds in acid rain end up in sediments, which form solid rock.
D
Sulfur compounds get into the air when we burn fuels such as wood or coal.
E
Sulfur compounds in the air dissolve in rainwater to make acid rain.
sulfur compounds in air
1
2
5
acid rain
3
sulfur compounds
in rocks and soil
4
sulfur
compounds
in plants
Fill in the table below to show which statement letter fits which arrow number.
arrow number
1
2
3
4
5
statement letter
[2]
© OCR 2009
Turn over
6
(d) Sulfur is present in two of the amino acids that make up proteins.
These are cysteine and methionine.
Cysteine contains a higher percentage of sulfur by mass than methionine.
cysteine
methionine
C3H7NO2S
C5H11NO2S
26.4% sulfur
21.5% sulfur
Put a tick (✓) in the box next to the best reason.
A molecule of cysteine contains more sulfur atoms than a
molecule of methionine.
The mass of sulfur atoms in a molecule of cysteine is greater than
the mass of sulfur atoms in a molecule of methionine.
The formula mass of cysteine is greater than the formula mass
of methionine.
A molecule of cysteine contains fewer carbon and hydrogen
atoms than a molecule of methionine.
[1]
[Total: 6]
© OCR 2009
7
2
Molten rock sometimes cools to form granite.
feldspar
biotite mica
muscovite mica
quartz
(a) Granite contains crystals of different minerals.
One of these minerals is mainly made of silicon dioxide.
The other minerals are more complicated compounds of silicon.
Put a ring around the one mineral that is mainly made of silicon dioxide.
biotite mica
feldspar
muscovite mica
quartz
[1]
(b) Here are some statements about silicon dioxide.
Put a tick (✓) in the box next to each of the two correct statements.
It is soft.
It has a low boiling point.
It has a high melting point.
It does not dissolve in water.
It conducts electricity when solid.
[2]
[Total: 3]
© OCR 2009
Turn over
8
3
Mark knows that carbon will take the oxygen away from many metal oxides.
(a) Put numbers in the boxes to balance the equation for the formation of zinc from zinc oxide.
ZnO
+
C
Zn
+
CO2
[1]
(b) Mark finds that the reaction does not work for magnesium oxide.
Put a tick (✓) in the box next to each of the two most likely reasons for this.
He doesn’t heat the reactants enough to make the reaction start.
Magnesium is too reactive to be extracted this way.
Magnesium oxide is too reactive to be extracted this way.
Magnesium has too high a melting point.
Magnesium oxide has too low a melting point.
The surface area of the magnesium oxide is too great.
The magnesium oxide is too hot.
Carbon is not reactive enough.
[2]
(c) He finds out that magnesium can be extracted by electrolysis.
One way might be to electrolyse molten magnesium oxide.
Choose terms from this list to complete the sentences.
molecules
ions
atoms
giant structures
gain
lose
share
The oxygen particles in the electrolyte are in the form of ....................................................... .
They move to an electrode where they ......................................................... electrons to form
neutral atoms.
The neutral atoms then combine to form ......................................................... .
[2]
[Total: 5]
© OCR 2009
9
4
Sylvia sets up this circuit.
(a) Sylvia decides to measure the potential difference across the lamp.
Draw on the circuit diagram to show how she connects a voltmeter.
Use the correct symbol.
[1]
(b) The voltmeter across the lamp reads 4 V. Sylvia asks her friends what this means.
Alan
It tells you about
the energy lost by
charge on its way
through the lamp.
Bess
It’s the rate at which
charge passes
through the lamp.
Carlo
It tells you how
much energy there
is in the battery.
Davina
It’s the amount of
charge in the lamp.
Who has the best answer?
answer ........................................................... [1]
© OCR 2009
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10
(c) (i)
Sylvia adjusts the variable resistor.
These four sentences explain why the brightness of the lamp changes.
They are in the wrong order.
A
The lamp gets dimmer.
B
The power of the lamp decreases.
C
The current in the resistor decreases.
D
The resistance of the circuit increases.
Put the sentences in the correct order. The last one has been done for you.
A
[1]
(ii)
Complete the sentences for the variable resistor.
Choose words from this list.
decreases
increases
stays the same
Sylvia adjusts the variable resistor.
The current in the variable resistor decreases.
The voltage across the variable resistor ..................................................... .
The voltage across the battery ........................................................ .
[1]
[Total: 4]
© OCR 2009
11
5
Brian has an electric toothbrush.
He connects it to the mains supply through a transformer.
(a) Here is a description of a transformer.
Put a ring around the correct word in each pair.
A transformer has two coils of wire.
The wire is made of copper iron
and is coated with a layer of
The wire is wound around a core made of copper
The core should have the shape of a ring
conductor insulator.
iron.
rod.
[1]
(b) The transformer reduces the 230 V mains supply to 4.6 V for the toothbrush.
The primary coil has 460 turns of wire.
How should Brian calculate the number of turns of wire in the secondary coil?
Put a ring around the correct answer.
230
460 × 4.6 = 2
© OCR 2009
4.6
230 × 460 = 9
230
4.6 × 460 = 23 000
460 × 230 × 4.6 = 486 680
[1]
Turn over
12
(c) The sentences below explain how a transformer works.
They are in the wrong order.
A
There is a current in the toothbrush motor.
B
The current in the primary coil changes.
C
The magnetic field in the core changes.
D
The voltage across the primary coil changes.
E
A voltage is induced across the secondary coil.
Put the sentences in the correct order.
The last one has been done for you.
A
[2]
(d) Here is the circuit diagram for Brian’s toothbrush.
transformer
M
The table shows the current in some of the components when the switch is open and closed.
Not all of the readings have been filled in.
Complete the table to show the three missing readings.
state of switch
resistor current
in amps
open
closed
motor current
in amps
lamp current
in amps
0.3
0.5
0.3
[1]
[Total: 5]
© OCR 2009
13
6
Joe tests a circuit from his computer.
He needs to be careful. The chips in the circuit are easily damaged by static electricity.
(a)
Complete the sentences. Choose the best words from the list.
atoms
conductors
electrons
insulators
particles
placed
pushed
rubbed
transformers
Objects can become charged when they are ........................................... against each other.
This allows .............................................. to be transferred from one to another.
For this to happen, both objects must be ............................................... .
[2]
(b) When Joe walks across the floor to his circuit, he becomes negatively charged.
Put a tick (✓) in the box next to each of the two correct statements.
Joe is now a source of alternating voltage.
The floor has become positively charged.
Joe is now surrounded by a magnetic field.
The floor must be made of a conducting material.
Joe now repels other objects which are negatively charged.
© OCR 2009
[1]
Turn over
14
(c) Joe now touches his circuit and damages it.
Use straight lines to connect each start of a sentence to its correct end.
start
The flow of charge from Joe is…
end
… a voltage in the circuit.
… no electrons free to move.
The insulators in the circuit have …
… plastic coating around them.
… lots of electrons free to move.
The conductors in the circuit have …
… an electric current in the circuit.
[2]
[Total: 5]
© OCR 2009
15
7
(a) The cell cycle can be divided into cell growth and mitosis.
Put a ring around the best word to complete each sentence.
During cell growth, the number of
The
chromosomes
nuclei
proteins
nuclei
During mitosis, pairs of chromosomes
Each cell forms
two
four
organelles
fuse
eight
cells
increases.
are copied.
separate
fragment.
new cells.
[3]
(b) Meiosis is another way that cells can divide.
Here are some statements about the results of mitosis and meiosis.
Put one tick (✓) in each row in the correct box.
statement
true for
mitosis
true for
meiosis
true for
both
number of chromosomes in daughter cells decreases
daughter cells are identical to parent cell
can produce gametes
the number of cells increases
daughter cells are identical to each other
[4]
[Total: 7]
© OCR 2009
Turn over
16
8
Cells contain the genetic code for making proteins.
(a) Why does a hair cell produce the protein keratin but not the protein haemoglobin?
Put a tick (✓) in the box next to the best explanation.
The gene for haemoglobin has been destroyed.
The gene for keratin is more dominant than the gene for haemoglobin.
The gene for haemoglobin is not active.
The cell does not contain the haemoglobin gene.
[1]
(b) DNA contains four different bases.
These bases control which protein is made.
Which three statements best explain this.
A
Each base reacts with an acid.
B
Each amino acid is coded for by three bases.
C
Proteins are coded for by three amino acids.
D
The protein made depends on the order of amino acids.
E
The bases make a copy of the protein and then reproduce it.
F
The order of the amino acids depends on the order of the bases.
G
The order of the bases can change depending on the conditions.
H
A DNA molecule changes its base order in order to make different proteins.
statements ...................... and ....................... and ................... [2]
[Total: 3]
© OCR 2009
17
9
New plants can be grown from cuttings.
(a) Complete the sentences to explain how this happens.
Choose words from the list.
auxins
dormant
enzymes
fertilisers
organ
specialised
tissue
unspecialised
xylem
To grow a plant from a cutting the gardener first cuts off part of a plant shoot.
The cut end of the shoot is dipped into hormones called .................................................. .
The hormones act on ............................................... cells within the stem to make them
develop into roots. Roots are just one type of .............................................. within a plant. [3]
(b) The hormones can also control the direction of growth.
This plant is receiving light from only one side.
Which statement correctly explains why the shoot tip grows towards the light?
Put a tick (✓) in the box next to the correct answer.
The side nearest the light has more hormone so it grows slower.
The side nearest the light has less hormone so it grows faster.
The side furthest from the light has more hormone so it grows faster.
The side furthest from the light has more hormone so it grows slower.
[1]
[Total: 4]
END OF QUESTION PAPER
© OCR 2009
18
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PLEASE DO NOT WRITE ON THIS PAGE
© OCR 2009
19
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PLEASE DO NOT WRITE ON THIS PAGE
Copyright Information
OCR is committed to seeking permission to reproduce all third-party content that it uses in its assessment materials. OCR has attempted to identify and contact all copyright holders
whose work is used in this paper. To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced in the OCR Copyright
Acknowledgements Booklet. This is produced for each series of examinations, is given to all schools that receive assessment material and is freely available to download from our public
website (www.ocr.org.uk) after the live examination series.
If OCR has unwittingly failed to correctly acknowledge or clear any third-party content in this assessment material, OCR will be happy to correct its mistake at the earliest possible
opportunity.
For queries or further information please contact the Copyright Team, First Floor, 9 Hills Road, Cambridge CB2 1PB.
OCR is part of the Cambridge Assessment Group; Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a
department of the University of Cambridge.
© OCR 2009
© OCR 2009
89
actinium
[227]
Ac*
57
lanthanum
139
La*
39
yttrium
89
Y
21
scandium
45
Sc
name
104
rutherfordium
[261]
Rf
72
hafnium
178
Hf
40
zirconium
91
Zr
22
titanium
48
Ti
105
106
seaborgium
[266]
Sg
[262]
Db
dubnium
74
tungsten
184
W
42
molybdenum
96
Mo
24
chromium
52
Cr
73
tantalum
181
Ta
41
niobium
93
Nb
23
vanadium
51
V
atomic (proton) number
relative atomic mass
atomic symbol
Key
107
bohrium
[264]
Bh
75
rhenium
186
Re
43
108
hassium
[277]
Hs
76
osmium
190
Os
44
ruthenium
101
Ru
[98]
Tc
technetium
26
iron
56
Fe
25
manganese
55
Mn
cobalt
59
Co
nickel
59
Ni
copper
63.5
Cu
zinc
65
Zn
boron
carbon
nitrogen
oxygen
16
O
6
fluorine
19
F
7
4
He
0
109
meitnerium
[268]
Mt
77
iridium
192
Ir
45
rhodium
103
Rh
27
110
darmstadtium
[271]
Ds
78
platinum
195
Pt
46
palladium
106
Pd
28
111
roentgenium
[272]
Rg
79
gold
197
Au
47
silver
108
Ag
29
The relative atomic masses of copper and chlorine have not been rounded to the nearest whole number.
81
thallium
204
Tl
49
indium
115
In
31
gallium
tin
82
lead
207
Pb
50
119
Sn
32
germanium
73
Ge
14
silicon
28
Si
6
83
bismuth
209
Bi
51
antimony
122
Sb
33
arsenic
75
As
15
phosphorus
31
P
7
84
polonium
[209]
Po
52
tellurium
128
Te
34
selenium
79
Se
16
sulfur
32
S
8
85
astatine
[210]
At
53
iodine
127
I
35
bromine
80
Br
17
chlorine
35.5
Cl
9
86
radon
[222]
Rn
54
xenon
131
Xe
36
krypton
84
Kr
18
argon
40
Ar
10
neon
Elements with atomic numbers 112-116 have been reported but not fully
authenticated
80
mercury
201
Hg
48
cadmium
112
Cd
30
70
Ga
13
aluminium
27
Al
5
20
Ne
2
14
N
5
helium
12
C
4
1
11
B
3
hydrogen
1
H
* The lanthanoids (atomic numbers 58-71) and the actinoids (atomic numbers 90-103) have been omitted.
88
87
[226]
Ra
[223]
Fr
radium
56
francium
barium
137
Ba
133
Cs
55
38
caesium
strontium
88
Sr
85
Rb
37
20
rubidium
calcium
40
Ca
39
K
19
12
potassium
magnesium
24
Mg
23
Na
11
4
sodium
beryllium
3
9
Be
7
Li
lithium
2
1
The Periodic Table of the Elements
20
A216/02
Mark Scheme
A216/02 Modules B5, C5, P5 Higher Tier
Question
Expected Answers
Jim (1)
1 a
covalent
b
shared
strong
the electrons in between
c
Marks
Rationale
1
2
all four correct = 2 marks
three correct = 1 mark
less than three correct = 0 marks
2
B E C A D
all five correct = 2 marks
three or four correct = 1 mark
1
d
a molecule of cysteine contains fewer …
Total

(1)
6
25
June 2009
A216/02
Mark Scheme
Question Expected Answers
quartz (1)
2 a
b
June 2009
Marks Rationale
1
accept any unambiguous indication
2
one mark for each correct tick
if more than two ticks deduct one mark for each additional tick
candidate cannot score less than 0 marks
It has a high melting point.
 (1)
It does not dissolve in water.
 (1)
Total
3
26
A216/02
Mark Scheme
Question
2
3 a
2
b
Expected Answers
Magnesium is too reactive to be … 
(1)

(1)
Carbon is not reactive enough.
c
Marks
1
both correct = 1 mark
ions
lose
molecules
Total
June 2009
Rationale
2
one mark for each correct tick
if more than two ticks deduct one mark for each additional tick
candidate cannot score less than 0 marks
2
three correct = 2 marks
two correct = 1 mark
1 correct = 0 marks
5
27
A216/02
Mark Scheme
Question
4 a
Expected Answers
A
B
V
C
D
Alan (1)
b
c
i
Marks
Rationale
1
look for V in a circle with the two lines coming out of it
connected to either side of the lamp
(one line to join the circuit anywhere between points A & B
one line to join the circuit anywhere between points C & D)
the circle with a V can be to the left of the lamp
look for clear intention of a voltmeter with leads coming out of it
candidates should demonstrate an understanding of how to wire in a
voltmeter rather than how to use the precise circuit symbols
1
D
C
B
ii increases
stays the same
if the answer line is blank, look at the list in case the correct word is
indicated
1
A
1
Total
June 2009
both correct = 1 mark
4
28
A216/02
Mark Scheme
Question
copper
5 a
insulator
iron
ring
b
Expected Answers
Marks
1
all correct = 1 mark
June 2009
Rationale
1
4.6
 460 = 9 (1)
230
c
D B C E A
2
all four correct = 2 marks
two or three correct = 1 mark
less than two correct = 0 marks
1
all three correct = 1 mark
D immediately before B
B immediately before C
C immediately before E
E immediately before A
d
open
closed
0
0
0.5
Total
5
29
A216/02
Mark Scheme
Question
rubbed
6 a
electrons
ensulators
b
Expected Answers
Marks
Rationale
2
all three correct = 2 marks
two correct = 1 mark
one correct = 0 marks
1
all correct = 1 mark
both ticks required for the mark
The floor has become positively … 
Joe now repels other objects …

2
c
The flow of …
… a voltage in …
lines from all three left hand boxes correct = 2 marks
lines from two left hand boxes correct = 1 mark
line from only one left hand box correct = 0 marks
… no electrons …
The insulators …
… plastic …
… lots of …
The conductors …
… an electric …
Total
5
30
June 2009
A216/02
Mark Scheme
Question
Expected Answers
organelles
7 a
chromosomes
separate
two
b
true for true for true for
statement
mitosis meiosis both
number of
chromosomes …
daughter cells …
can produce
gametes
the number of
cells increases
daughter cells are
identical …

Marks
3
all four correct = 3 marks
three correct = 2 marks
two correct = 1 mark
one correct = 0 marks
4
all 5 rows correct = 4 marks
4 rows correct = 3 marks
3 rows correct = 2 marks
2 rows correct = 1 mark
1 row correct = 0 marks

Rationale
if fourth row has a tick in right hand box, ignore other ticks in that row
if fourth row has no tick in right hand box, accept ticks in both the other
boxes for this row



Total
June 2009
7
31
A216/02
Question
8 a
Mark Scheme
Expected Answers
Marks
1
June 2009
Rationale
The gene for haemoglobin is not active.  (1)
b
B, D, F in any order
2
Total
9
a
all three correct = 2 marks
2 correct = 1 mark
1 correct = 0 marks
accept any unambiguous indication of choice
3
3
auxins (1)
unspecialised (1)
organ (1)
one mark for each correct answer
1
b
The side furthest from the light has … 
Total
(1)
4
32
H
GENERAL CERTIFICATE OF SECONDARY EDUCATION
A216/02
TWENTY FIRST CENTURY SCIENCE
ADDITIONAL SCIENCE A
Unit 2: Modules B5 C5 P5 (Higher Tier)
* O C E / 1 5 7 7 6 *
Candidates answer on the Question Paper
A calculator may be used for this paper
Wednesday 27 January 2010
Afternoon
OCR Supplied Materials:
None
Duration: 40 minutes
Other Materials Required:
•
Pencil
•
Ruler (cm/mm)
*
A
2
1
6
0
2
*
INSTRUCTIONS TO CANDIDATES
•
•
•
•
•
•
Write your name clearly in capital letters, your Centre Number and Candidate Number in the boxes above.
Use black ink. Pencil may be used for graphs and diagrams only.
Read each question carefully and make sure that you know what you have to do before starting your answer.
Answer all the questions.
Do not write in the bar codes.
Write your answer to each question in the space provided, however additional paper may be used if
necessary.
INFORMATION FOR CANDIDATES
•
•
•
•
•
The number of marks is given in brackets [ ] at the end of each question or part question.
The total number of marks for this paper is 42.
A list of physics equations is printed on page 2.
The Periodic Table is printed on the back page.
This document consists of 20 pages. Any blank pages are indicated.
© OCR 2010 [D/103/3775]
DC (SHW 00377 12/08) 15776/5
OCR is an exempt Charity
Turn over
2
TWENTY FIRST CENTURY SCIENCE EQUATIONS
Useful Relationships
Explaining Motion
speed =
distance travelled
time taken
momentum = mass × velocity
change of momentum = resultant force × time for which it acts
work done by a force = force × distance moved by the force
change in energy = work done
change in GPE = weight × vertical height difference
1
kinetic energy = 2 × mass × [velocity]2
Electric Circuits
resistance =
voltage
current
voltage across primary coil
number of turns in primary coil
=
voltage across secondary coil
number of turns in secondary coil
energy transferred = power × time
power = potential difference × current
efficiency =
energy usefully transferred
× 100%
total energy supplied
The Wave Model of Radiation
wave speed = frequency × wavelength
© OCR 2010
3
Answer all the questions.
1
We use millions of tonnes of iron every year.
It is used to make an enormous number of things such as girders, chains and bridges.
(a) Iron is important because it is comparatively cheap and its properties are useful.
Draw straight lines to link each property to why it is useful.
You should draw four lines.
property
why it is useful
can be used to make roof supports
good electrical conductor
can be hammered into different shapes
high melting point
can be used to make lightning conductors
malleable
can be used to make barbecues
strong
can be used to make magnets
© OCR 2010
Turn over
[3]
4
(b) Iron is extracted from iron ore.
Iron ore contains iron oxide.
There are different types of iron oxide.
Which of these formulae corresponds to the oxide with the highest proportion of iron atoms?
Put a ring around the correct answer.
FeO
Fe2O3
Fe3O4
[1]
(c) Iron is extracted from iron oxide in a blast furnace.
Iron forms through a sequence of reactions.
Here are the reactions, but they are not in the correct order.
A
2C + O2
B
FeO + CO
C
Fe3O4 + CO
D
3Fe2O3 + CO
2CO
Fe + CO2
3FeO + CO2
2Fe3O4 + CO2
Put the reactions into the correct order. The last one has been done for you.
B
start
end
[1]
(d) Use the Periodic Table to find the relative atomic masses of iron and oxygen.
What mass of iron is present in 72 g of FeO?
Put a ring around the correct answer.
16 g
26 g
36 g
56 g
[1]
(e) Carbon monoxide is a gas at room temperature.
What does this indicate about the structure and bonding of carbon monoxide?
...................................................................................................................................................
...................................................................................................................................................
............................................................................................................................................ [2]
© OCR 2010
5
(f)
Iron is a metal.
Solid metals have their own type of structure.
Put a tick (✓) in the three boxes next to descriptions that are true for solid metals.
contains electrons
contains positive ions
contains negative ions
some of the ions are free to move
some of the electrons are free to move
contains no ions
[2]
(g) Some metals are extracted by electrolysis rather than in a blast furnace.
electrodes
electrolyte
Electrolysis only works for some liquids.
These are called electrolytes.
Explain why electrolytes can conduct electricity.
...................................................................................................................................................
...................................................................................................................................................
............................................................................................................................................ [3]
[Total: 13]
© OCR 2010
Turn over
6
2
As the space shuttle re-enters the Earth’s atmosphere it gets intensely hot.
A
NAS
(a) The skin of the space shuttle is covered with silicon dioxide tiles to protect it.
Put ticks (✓) in the boxes next to the three properties of silicon dioxide that are most useful
for withstanding re-entry.
useful for
re-entry
chemically unreactive
high melting point
good thermal insulator
good electrical insulator
[1]
(b) Silicon dioxide is held together by covalent bonds.
Draw one line to link the type of interaction that holds the molecule together to the particles
involved.
type of interaction
particles involved
electrostatic attraction
electrons
or
or
magnetic attraction
nuclei
or
or
electrostatic repulsion
electrons and nuclei
[1]
[Total: 2]
© OCR 2010
7
3
A student investigates the effect of temperature change on a thermistor.
The circuit diagram shows a battery and a thermistor.
The circuit diagram is not finished.
(a) A voltmeter and ammeter are missing from the diagram.
Draw them in the correct places. Use the correct circuit symbols.
[2]
(b) Complete the sentence. Choose words from this list.
decreases
increases
stays the same
When the temperature of the thermistor is increased
the resistance of the thermistor …………………………………………
and the reading of the ammeter ………………………………………… .
[1]
(c) Put a ring around the words that correctly complete the sentence.
The ammeter measures the flow of
in units of
amperes
/
joules
charge
/
/
power
in the thermistor
volts.
[1]
[Total: 4]
© OCR 2010
Turn over
8
4
The diagram shows a magnet close to a coil of wire. The magnet can spin on the shaft.
coil
magnet
N
shaft
S
terminals
(a) Explain why there is an alternating voltage across the terminals when the magnet spins
round.
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
............................................................................................................................................ [3]
© OCR 2010
9
(b) A lamp is connected across the terminals of the coil.
coil
magnet
N
S
shaft
Put a ring around each term that correctly completes the sentences.
The current in the lamp is
a.c.
/
d.c.
/
p.c.
The lamp filament heats up because atoms in the wire are hit by charges that are
expanding
/
moving
/
spinning.
[1]
(c) The glowing filament has a resistance of 4 Ω.
What is the current in the filament when the voltage across it is 2 V?
Put a ring around the correct answer.
0.5 A
2A
6A
8A
[1]
[Total: 5]
© OCR 2010
Turn over
10
5
A mains lamp connected to a 230 V supply has a power of 150 W.
(a) Calculate the current in the lamp. Show your working.
current = ..................................................... A [2]
(b) The lamp is left on for 24 hours. 3.6 kWh of electrical energy is transferred to it.
0.18 kWh of light energy transfers out of the lamp in that time.
What is the efficiency of the lamp?
Put a ring around the correct answer.
0.05%
5%
20%
2000%
[1]
(c) The mains electricity supply is a.c., not d.c.
Put ticks (✓) in the boxes next to the two correct reasons for this.
d.c. heats up wires more than a.c.
a.c. is easier to generate than d.c.
d.c. can only be produced by batteries
there is less risk of electric shock with a.c.
a.c. can be distributed more efficiently than d.c.
[1]
© OCR 2010
11
(d) The 150 W lamp is replaced with one that has a power of only 60 W.
Draw straight lines from each electrical property to how it changes when the lamp is
replaced.
electrical property
how it changes
current
increases
resistance
decreases
potential difference
stays the same
[1]
[Total: 5]
© OCR 2010
Turn over
12
6
Chloe analyses a sample of DNA.
(a) Here is a short segment of DNA from the sample.
Chloe knows that it contains four bases, A, C, G, and T, arranged like this.
A
T
G
C
G
C
C
G
T
A
A
T
C
G
A
T
T
A
She finds the percentages of some of the bases in the whole DNA sample.
Complete the table to suggest how much of the other two bases Chloe will find in her
sample.
base
% present
C
20
A
30
T
G
[1]
© OCR 2010
13
(b) DNA controls the making of proteins.
(i)
Complete this sentence. Choose the answer from this list.
amino acids
carbohydrates
enzymes
fats
sugars
The sequence of bases in DNA determines the order of ……………………………………
in the protein which is made.
(ii)
[1]
Put ticks (✓) in the boxes next to the two correct statements.
Proteins are made in the cytoplasm.
Proteins are made in the nucleus.
DNA takes the genetic code to the cytoplasm.
A copy of the gene carries the genetic code to the cytoplasm.
Proteins are made out of DNA.
New DNA is made in the cytoplasm.
[2]
[Total: 4]
© OCR 2010
Turn over
14
BLANK PAGE
Question 7 starts on page 15.
PLEASE DO NOT WRITE ON THIS PAGE
© OCR 2010
15
7
(a) All cells in a plant originate from the same cell.
Leaf cells contain chlorophyll, but root cells do not.
Explain why leaf and root cells in the same plant can develop differently.
Use ideas about genes in your answer.
...................................................................................................................................................
...................................................................................................................................................
............................................................................................................................................ [2]
(b) New plants can be made by taking cuttings.
Andrew takes a cutting of a plant stem.
There are no roots on the cutting.
State
•
•
how to make a cutting produce roots
which cells of the cutting develop into roots.
...................................................................................................................................................
...................................................................................................................................................
............................................................................................................................................ [2]
[Total: 4]
© OCR 2010
Turn over
16
8
This question is about how plant shoots respond to light.
In an experiment, different parts of growing shoots are covered with metal foil.
Light is shone from one side only.
light
= metal foil
A
B
C
D
Some of the shoots bend towards the light.
(a) Which shoot, A, B, C or D, does not bend towards the light?
answer ........................................................ [1]
(b) Some of the following statements can be used to explain how shoots grow towards the light.
They are in the wrong order.
Select the correct statements, and put them in the correct order.
A
B
Auxin makes the shoot cells expand on this side.
Auxin makes the shoot cells shrink on this side.
C
D
Auxin moves down the stem from the tip.
Auxin moves up the stem to the tip.
E
F
Auxin concentration becomes highest on the dark side of the stem.
Auxin concentration becomes highest on the light side of the stem.
[2]
© OCR 2010
17
(c) The growth of shoots towards the light can be an advantage to the plant.
Some students were asked to explain why this is.
Amelia
Cary
Phototropism helps
the shoots gain the
most light for
photosynthesis.
Geotropism helps the
roots to spread out.
Sam
Growing towards the
light increases the
plant’s chances of
survival.
Martin
Growing towards the
light helps plants to
gain more carbon
dioxide.
Jane
Phototropism helps
transport sugars in
the phloem.
Reena
Growing towards the
light helps plants to
gain more water.
Nicola
Bending towards the
light helps the plant
keep low to the ground.
Which two students gave the best reasons?
answer ........................................................... and ........................................................... [2]
[Total: 5]
END OF QUESTION PAPER
© OCR 2010
18
BLANK PAGE
PLEASE DO NOT WRITE ON THIS PAGE
© OCR 2010
19
PLEASE DO NOT WRITE ON THIS PAGE
Copyright Information
OCR is committed to seeking permission to reproduce all third-party content that it uses in its assessment materials. OCR has attempted to identify and contact all copyright holders
whose work is used in this paper. To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced in the OCR Copyright
Acknowledgements Booklet. This is produced for each series of examinations, is given to all schools that receive assessment material and is freely available to download from our public
website (www.ocr.org.uk) after the live examination series.
If OCR has unwittingly failed to correctly acknowledge or clear any third-party content in this assessment material, OCR will be happy to correct its mistake at the earliest possible
opportunity.
For queries or further information please contact the Copyright Team, First Floor, 9 Hills Road, Cambridge CB2 1GE.
OCR is part of the Cambridge Assessment Group; Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a
department of the University of Cambridge.
© OCR 2010
© OCR 2010
89
actinium
[227]
Ac*
57
lanthanum
139
La*
39
yttrium
89
Y
21
scandium
45
Sc
name
104
rutherfordium
[261]
Rf
72
hafnium
178
Hf
40
zirconium
91
Zr
22
titanium
48
Ti
105
106
seaborgium
[266]
Sg
[262]
Db
dubnium
74
tungsten
184
W
42
molybdenum
96
Mo
24
chromium
52
Cr
73
tantalum
181
Ta
41
niobium
93
Nb
23
vanadium
51
V
atomic (proton) number
relative atomic mass
atomic symbol
Key
107
bohrium
[264]
Bh
75
rhenium
186
Re
43
108
hassium
[277]
Hs
76
osmium
190
Os
44
ruthenium
101
Ru
[98]
Tc
technetium
26
iron
56
Fe
25
manganese
55
Mn
cobalt
59
Co
nickel
59
Ni
copper
63.5
Cu
zinc
65
Zn
boron
carbon
nitrogen
oxygen
16
O
6
fluorine
19
F
7
4
He
0
109
meitnerium
[268]
Mt
77
iridium
192
Ir
45
rhodium
103
Rh
27
110
darmstadtium
[271]
Ds
78
platinum
195
Pt
46
palladium
106
Pd
28
111
roentgenium
[272]
Rg
79
gold
197
Au
47
silver
108
Ag
29
The relative atomic masses of copper and chlorine have not been rounded to the nearest whole number.
81
thallium
204
Tl
49
indium
115
In
31
gallium
tin
82
lead
207
Pb
50
119
Sn
32
germanium
73
Ge
14
silicon
28
Si
6
83
bismuth
209
Bi
51
antimony
122
Sb
33
arsenic
75
As
15
phosphorus
31
P
7
84
polonium
[209]
Po
52
tellurium
128
Te
34
selenium
79
Se
16
sulfur
32
S
8
85
astatine
[210]
At
53
iodine
127
I
35
bromine
80
Br
17
chlorine
35.5
Cl
9
86
radon
[222]
Rn
54
xenon
131
Xe
36
krypton
84
Kr
18
argon
40
Ar
10
neon
Elements with atomic numbers 112-116 have been reported but not fully
authenticated
80
mercury
201
Hg
48
cadmium
112
Cd
30
70
Ga
13
aluminium
27
Al
5
20
Ne
2
14
N
5
helium
12
C
4
1
11
B
3
hydrogen
1
H
* The lanthanoids (atomic numbers 58-71) and the actinoids (atomic numbers 90-103) have been omitted.
88
87
[226]
Ra
[223]
Fr
radium
56
francium
barium
137
Ba
133
Cs
55
38
caesium
strontium
88
Sr
85
Rb
37
20
rubidium
calcium
40
Ca
39
K
19
12
potassium
magnesium
24
Mg
23
Na
11
4
sodium
beryllium
3
9
Be
7
Li
lithium
2
1
The Periodic Table of the Elements
20
A216/02
Mark Scheme
January 2010
A216/02 Modules B5, C5, P5 Higher Tier
1
Question
a
Expected Answers
property
why it is useful
Marks
[3]
… roof supports
… conductor
… hammered …
high melting …
… conductor
malleable
… barbecues
strong
… magnets
b
c
FeO (1)
[1]
[1]
A
d
56g (1)
D
C
B
(1)
[1]
25
Additional Guidance
all four property boxes have one line going to the correct
place = 3 marks
only three of the property boxes have one line going to the
correct place = 2 marks
only two of the property boxes have one line going to the
correct place = 1 mark
only one of the property boxes has one line going to the
correct place = 0 marks
A216/02
1
Mark Scheme
Question
e
Expected Answers
any two from:
(small) molecules;
(molecules/particles - not atoms) far apart;
weak forces (implied between carbon monoxide
molecules not between atoms);
strong forces (implied inside carbon monoxide);
‘covalent’ used correctly;
Marks
[2]
contains electrons

contains positive ions

...electrons are free to move
Additional Guidance
accept bonds ‘loose’
[2]
f
January 2010
assume the candidate is discussing bonds holding atoms
within the molecule unless stated otherwise
one mark for each correct point which has not been
contradicted
ignore pairs of statements which are contradictory
ignore incorrect statements which do not contradict a correct
statement
allow the word ‘bond’ for any interaction
3 correct = 2 marks
2 correct = 1 mark
1 correct = 0 marks
if more than three ticks, each extra tick cancels out one
correct marking point

26
A216/02
1
Question
g
Mark Scheme
Expected Answers
(electrolyte) is ionic / contains ions /
charged particles(1)
Marks
[3]
January 2010
Additional Guidance
particles become charged = contradiction
reject electrons/atoms/molecules/neutrons for first marking
point only but allow ‘protons’
allow named examples eg sodium ions and chloride ions
allow ‘contains positive ions’ or ‘contains negative ions’
movement (of particles mentioned above) (1)
ignore attraction for the ‘movement’ marking point
(attracted to/move) towards the electrodes (1)
ignore incorrect directions eg ‘positive particles to anode’
‘electrons move towards electrodes’ = 2 marks
‘ion free to move but stay in a regular pattern’ = 1 for ions
contradiction for movement
Total
[13]
27
A216/02
2
Mark Scheme
Question
a
Expected Answers
chemically unreactive

high melting point

good thermal insulator

b
Marks
[1]
[1]
electrostatic
repulsion
electrons
and nuclei
Total
[2]
28
January 2010
Additional Guidance
there must be the one correct line only
A216/02
3
Mark Scheme
Question
a
Expected Answers
Marks
[2]
January 2010
Additional Guidance
ammeter:
correct symbol (capital A in circle) in correct place = 1 mark
voltmeter:
correct symbol (capital V in circle) in correct place = 1 mark
b
c
decreases
increases
charge
amperes
[1]
[1]
Total
[4]
29
both correct = 1 mark
accept any unambiguous response
both correct = 1 mark
accept any unambiguous response
A216/02
4
Mark Scheme
Question
a
Expected Answers
maximum of three marks made up of
Marks
[3]
any two from:
any important property of the magnet
eg polarity / distance (from coil) /
direction of movement (but not direction of
spin);
reference to movement of magnet /
change in magnetism, including ‘spin’ of the
magnet;
effect of speed of movement;
the current /voltage/electrons change direction;
c
a.c.
moving
0.5 A (1)
[1]
Total
Additional Guidance
unspecified ‘it’ refers to the magnet
ignore attraction and repulsion by or to the magnet
ignore reference to the word ‘charge’ in connection with the
magnet
ignore reference to ‘ends’ of the magnet
reject ‘the coil makes the magnet move’ (wrong causality)
and any three from:
explains reversal of current/voltage (not just
change) / links reversal of current to each half
turn of the magnet;
use of high level term – ‘induction’;
use of high level term - ‘(magnetic) field’
b
January 2010
[1]
[5]
30
examples:
‘different ends of the magnet have different charge’ = 0 marks
‘different ends of the magnet have different charged poles’ = 1
mark
‘moving magnet makes electric current’ = 1 mark
‘moving magnet makes electrons move backwards and
forwards’ = 2 marks (reversal not explained)
‘as the magnet spins the coil of wire is attracted and repelled’
= 2 marks
‘as one pole of the magnet enters the coil, the direction of the
current goes one way, as the opposite enters, the current is
sent in the opposite direction’ = 3 marks
‘the current changes direction’ = 1 mark
‘the current changes direction for every half turn of the
magnet’ = 2 marks
accept any unambiguous response
A216/02
5
Mark Scheme
Question
a
Expected Answers
0.65 (2)
if answer wrong look for working for maximum
of 1 mark
Marks
[2]
150
(1)
230
b
c
Additional Guidance
correct numerical answer with no working = 2 marks
accept answers from 0.6 – 0.7
if no numerical working given acccept I=P/V (1)
ignore P=IV
5% (1)
[1]
[1]
a.c. is easier to generate than d.c.

… distributed more efficiently …

d
[1]
current
increases
resistance
decreases
potential
difference
stays the
same
Total
[5]
31
January 2010
A216/02
Mark Scheme
Question
6
a
b
Expected Answers
i
ii
base
% present
C
20
A
30
T
30
G
20
Marks
[1]
amino acids (1)
[1]
[2]
… are made in the cytoplasm.  (1)
A copy of the gene caries …
Total
 (1)
[4]
32
January 2010
Additional Guidance
if answer not on dotted line, look for a ringed word
if more than two ticks, each extra tick cancels out one correct
marking point
A216/02
7
Mark Scheme
Question
a
b
Expected Answers
any two from:
(all) cells have the same (set of) genes;
idea that different genes do different jobs;
idea that gene can be switched on/off;
some (genes switched on);
hormone/auxin/rooting powder (1)
Marks
[2]
[2]
meristem/unspecialised (cells) (1)
Total
8
a
b
E
c
C
A
Amelia (1)
Sam (1)
Total
Additional Guidance
answer must refer to genes
ignore ‘different cells have different genes’
ignore incorrect context
eg
‘different cells have different genes which do different jobs’ = 1
mark for 2nd marking point
‘genes are switched on’ = 1 mark
‘some genes are switched on’ = 2 marks
‘some genes are switched off’ = 2 marks
‘the genes for making chlorophyll are switched on in the leaf
not in the root’ = 2 marks
accept plant it / put in a dish of compost/nutrient/water
ignore unqualified ‘powder’
ignore ‘stem cells’
ignore ‘cut it down the middle’
[4]
B (1)
[1]
[2]
accept any unambiguous response
ACE in incorrect order = 1 mark
any letters incorrect = 0 marks
[2]
any order
accept any unambiguous response
accept ‘A’ and ‘S’
(2)
[5]
33
January 2010
H
GENERAL CERTIFICATE OF SECONDARY EDUCATION
A216/02
TWENTY FIRST CENTURY SCIENCE
ADDITIONAL SCIENCE A
Unit 2: Modules B5 C5 P5 (Higher Tier)
* O C E / 1 5 3 5 4 *
Monday 28 June 2010
Morning
Candidates answer on the Question Paper
A calculator may be used for this paper
OCR Supplied Materials:
None
Duration: 40 minutes
Other Materials Required:
•
Pencil
•
Ruler (cm/mm)
*
A
2
1
6
0
2
*
INSTRUCTIONS TO CANDIDATES
•
•
•
•
•
•
Write your name clearly in capital letters, your Centre Number and Candidate Number in the boxes above.
Use black ink. Pencil may be used for graphs and diagrams only.
Read each question carefully and make sure that you know what you have to do before starting your answer.
Answer all the questions.
Do not write in the bar codes.
Write your answer to each question in the space provided. Additional paper may be used if necessary but
you must clearly show your Candidate Number, Centre Number and question number(s).
INFORMATION FOR CANDIDATES
•
•
•
•
•
The number of marks is given in brackets [ ] at the end of each question or part question.
The total number of marks for this paper is 42.
A list of physics equations is printed on page 2.
The Periodic Table is printed on the back page.
This document consists of 20 pages. Any blank pages are indicated.
© OCR 2010 [D/103/3775]
DCA (LEO/CG) 15354/6
OCR is an exempt Charity
Turn over
2
TWENTY FIRST CENTURY SCIENCE EQUATIONS
Useful Relationships
Explaining Motion
speed =
distance travelled
time taken
momentum = mass × velocity
change of momentum = resultant force × time for which it acts
work done by a force = force × distance moved in the direction of the force
change in energy = work done
change in GPE = weight × vertical height difference
1
kinetic energy = 2 × mass × [velocity]2
Electric Circuits
resistance =
voltage
current
voltage across primary coil
number of turns in primary coil
=
voltage across secondary coil number of turns in secondary coil
energy transferred = power × time
power = potential difference × current
efficiency =
energy usefully transferred
× 100 %
total energy supplied
The Wave Model of Radiation
wave speed = frequency × wavelength
© OCR 2010
3
BLANK PAGE
Question 1 starts on page 4
PLEASE DO NOT WRITE ON THIS PAGE
© OCR 2010
Turn over
4
Answer all the questions.
1
Chemicals such as water are vital for life.
Most of our planet is covered by water.
(a) Sea water is too salty for us to use.
The concentration of salt in the sea has increased over millions of years.
The amount of sea water has not changed much over millions of years.
condensation
sun
evaporation
rain
Use ideas from the diagram to explain how salt gets into the sea, and why the seas have
become saltier.
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
.............................................................................................................................................. [3]
© OCR 2010
5
(b) Water easily evaporates into the air.
What does this tell you about water?
Draw one straight line to join the two correct boxes.
water is made of
forces between water particles
small molecules
strong forces of repulsion
or
or
large molecules
weak forces of repulsion
or
or
a giant structure of ions
strong forces of attraction
or
or
a giant structure of atoms
weak forces of attraction
[2]
(c) Astronomers look for signs of life on other planets.
They look for water and also for other chemicals.
Put a ring around the chemical most likely to show that life is present.
Al 2O3
CH4
CaCl 2
NaCl
SiO2
[1]
[Total: 6]
© OCR 2010
Turn over
6
2
The electric cables carried on pylons are made from aluminium.
(a) Aluminium cables are good electrical conductors.
Some students try to explain how a solid metal conducts electricity.
Which two students make correct statements that are part of the true explanation?
Carolyn
Metals contain
negative ions.
Mary
Metals don't
contain ions.
Judith
Metals contain
small molecules.
Danielle
Metals contain
electrons.
Alistair
Heat can move
through a
metal.
Andy
Charge can
move through
a metal.
Stan
Nothing can
move through a
metal.
Ryan
Neutral particles
can move
through a metal.
answer ................................. and ................................. [2]
© OCR 2010
7
(b) The cables are suspended from tall pylons.
The cables are made of aluminium rather than copper.
Volume for volume, aluminium has 65 % of the electrical conductivity of copper.
Weight for weight, aluminium has twice the electrical conductivity of copper.
Use this information to explain why aluminium is used instead of copper.
...................................................................................................................................................
...................................................................................................................................................
............................................................................................................................................. [1]
(c) The aluminium used to make the cables is extracted from aluminium oxide.
Aluminium oxide is the mineral in aluminium ore.
Some ores produce 2 tonnes of aluminium oxide from 5 tonnes of ore.
Put a ring around the percentage of aluminium oxide in these ores.
10 %
20 %
25 %
40 %
50 %
[1]
(d) To make aluminium, melted aluminium oxide is electrolysed.
Put a tick (✓) in the box next to the best description of electrolysis.
using an electric current to melt a compound
using an electric current to purify a compound
using an electric current to make a compound
using an electric current to decompose a compound
© OCR 2010
[1]
Turn over
8
(e) Carbon dioxide gas is produced when aluminium oxide is electrolysed.
carbon
electrode
electrolyte of
molten
aluminium oxide
carbon
electrode
Draw a straight line to link one statement from column 1 with one statement from column 2
to explain why carbon dioxide is produced.
column 1
column 2
Oxygen is bubbled
into the cell.
Oxygen reacts with
the electrolyte.
or
or
Oxygen is not formed in
the process.
Oxygen reacts with the
positive electrode.
or
or
Oxygen is dissolved in
the electrolyte.
Oxygen reacts with the
negative electrode.
or
or
Oxygen is formed at the
positive electrode.
Electrolyte reacts with the
positive electrode.
or
or
Oxygen is formed at the
negative electrode.
Electrolyte reacts with the
negative electrode.
[2]
© OCR 2010
9
(f)
What is the electrode reaction that produces the aluminium?
Put a tick (✓) in the box next to the correct answer.
Al 3+ + e–
Al
Al 3+ + 3e–
Al
Al 3+ + 3e–
3Al
Al 3+ + e3–
3Al
[1]
[Total: 8]
© OCR 2010
Turn over
10
3
The circuit below contains a thermistor.
A
4.5 V
(a) Complete the sentence for a thermistor.
Choose words from this list.
current
light level
pressure
resistance
temperature
voltage
The .................................. of the thermistor increases with decreasing .................................. .
[2]
(b) When the switch is closed, the ammeter reads 0.5 A.
Put a ring around the correct value for the thermistor resistance.
0.1 Ω
2.3 Ω
5Ω
9Ω
[1]
(c) A voltmeter can be used to measure the potential difference across the thermistor.
Draw the voltmeter on the circuit diagram and show how it should be connected.
[1]
[Total: 4]
© OCR 2010
11
4
Both resistors in this circuit have the same value.
A
6Ω
6V
6Ω
(a) Complete the sentences. Choose words from this list.
charge
current
resistance
voltage
The energy transferred by each unit of charge as it goes around the circuit is equal
to the .................................. of the battery.
Closing the switch increases the battery ................................... .
[2]
(b) Complete the table.
Choose numbers from the list.
0
0.5
state of the switch
1
2
ammeter reading in amps
open
closed
[1]
(c) The two resistors are now connected in series with the switch.
A
6Ω
6V
6Ω
Explain why the current in each resistor is 0.5 A when the switch is closed.
Show a calculation in your answer.
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
.............................................................................................................................................. [2]
[Total: 5]
© OCR 2010
Turn over
12
5
This transformer has two coils wound on a core.
230
coil
volts
a.c.
lamp
core
The left-hand coil of the transformer is connected to the 230 V a.c. mains supply.
(a) Explain why there is an a.c. voltage across the right-hand coil.
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
.............................................................................................................................................. [3]
(b) The left-hand coil has 180 turns and the right-hand coil has 90 turns.
What is the voltage across the lamp?
Put a ring around the correct answer.
90 V
115 V
230 V
460 V
[1]
(c) The lamp has a power of 0.1 kW.
It is left on for a week.
How much electrical energy does it use?
Put a ring around the correct answer.
0.7 kWh
2.4 kWh
8.4 kWh
16.8 kWh
[1]
[Total: 5]
© OCR 2010
13
6
Harry takes a cutting of a plant.
He wants to know what happens to the cutting as it grows into a plant.
(a) Explain how a new plant grows from a cutting.
Your explanation should include these terms:
clone
hormone
xylem cells
unspecialised cells
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
.............................................................................................................................................. [3]
(b) Harry’s new plant shows a positive phototropic response.
How does this increase the plant’s chance of survival?
...................................................................................................................................................
.............................................................................................................................................. [1]
[Total: 4]
© OCR 2010
Turn over
14
7
The cell cycle is made up of cell growth and mitosis.
During mitosis a number of processes take place.
(a) Put ticks (✓) in the boxes next to the two processes that occur only during mitosis.
cells divide
chromosomes are copied
number of organelles increases
number of nuclei stays the same
copies of chromosomes separate
[2]
(b) Another type of cell division is meiosis.
(i)
What type of cell is formed by meiosis?
...................................................................................................................................... [1]
(ii)
The cells made in meiosis may not all be the same size.
If one of the new cells is larger than another, what can you say about the number of
chromosomes in each?
Put a tick (✓) in the box next to the correct statement.
The larger cell has more chromosomes.
The smaller cell has more chromosomes.
They have the same number of chromosomes.
The first cell to form has more chromosomes.
© OCR 2010
[1]
15
(c) Animal cells can now be made by cloning.
Paul is a scientist working in a laboratory cloning rabbits.
He removes the nucleus from an egg cell of one rabbit.
He then inserts a nucleus from a donor cell taken from another rabbit.
An embryo then develops.
rabbit
egg cell
nucleus
removed
cloned
cell
developing
embryo
donor
nucleus
transferred
donor cell
(i)
Which statement best describes what is happening to the genes from the donor cell in
this process?
Put a tick (✓) in the box next to the correct answer.
All genes are activated.
All genes are inactivated.
All active genes are inactivated.
Some inactive genes are reactivated.
(ii)
[1]
In the early stages of embryo growth, only stem cells are present.
How do these cells differ from normal body cells?
Put a tick (✓) in the box next to the correct answer.
Stem cells have twice the usual number of chromosomes.
Stem cells are specialised.
Stem cells are unspecialised.
Stem cells have half the usual number of chromosomes.
[1]
[Total: 6]
© OCR 2010
Turn over
16
8
A length of DNA is made up of two strands.
(a) Some of the bases on the strands are shown.
Complete the diagram to show the pairing of the bases.
The first pair has been done for you.
C
G
A
C
A
G
T
[1]
(b) Why is the pairing of the bases significant?
Put ticks (✓) in the boxes next to the two best answers.
to make all DNA molecules different
to hold the strands of DNA together
to allow exact copies of DNA to be made
to allow proteins to join DNA in chromosomes
to allow each base pair to code for a different amino acid
© OCR 2010
[1]
17
(c) DNA contains the genetic code to make proteins.
DNA molecules stay in one place, so a copy of the gene carries the information to where the
protein is actually made.
There are several stages in the process of making protein.
Select the four correct statements from the list and place them in the correct order. One has
been done for you.
A
A copy of the gene moves from the nucleus to the cytoplasm.
B
Fatty acid molecules join together.
C
A copy of the gene moves from the cytoplasm to the nucleus.
D
A copy of the information in the DNA base sequence is made.
E
Amino acid molecules join together.
F
The order of these determines the protein structure.
F
[2]
[Total: 4]
END OF QUESTION PAPER
© OCR 2010
18
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PLEASE DO NOT WRITE ON THIS PAGE
© OCR 2010
19
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© OCR 2010
© OCR 2010
89
actinium
[227]
Ac*
57
lanthanum
139
La*
39
yttrium
89
Y
21
scandium
45
Sc
name
104
rutherfordium
[261]
Rf
72
hafnium
178
Hf
40
zirconium
91
Zr
22
titanium
48
Ti
105
106
seaborgium
[266]
Sg
[262]
Db
dubnium
74
tungsten
184
W
42
molybdenum
96
Mo
24
chromium
52
Cr
73
tantalum
181
Ta
41
niobium
93
Nb
23
vanadium
51
V
atomic (proton) number
relative atomic mass
atomic symbol
Key
107
bohrium
[264]
Bh
75
rhenium
186
Re
43
108
hassium
[277]
Hs
76
osmium
190
Os
44
ruthenium
101
Ru
[98]
Tc
technetium
26
iron
56
Fe
25
manganese
55
Mn
cobalt
59
Co
nickel
59
Ni
copper
63.5
Cu
zinc
65
Zn
boron
carbon
nitrogen
oxygen
16
O
6
fluorine
19
F
7
4
He
0
109
meitnerium
[268]
Mt
77
iridium
192
Ir
45
rhodium
103
Rh
27
110
darmstadtium
[271]
Ds
78
platinum
195
Pt
46
palladium
106
Pd
28
111
roentgenium
[272]
Rg
79
gold
197
Au
47
silver
108
Ag
29
The relative atomic masses of copper and chlorine have not been rounded to the nearest whole number.
81
thallium
204
Tl
49
indium
115
In
31
gallium
tin
82
lead
207
Pb
50
119
Sn
32
germanium
73
Ge
14
silicon
28
Si
6
83
bismuth
209
Bi
51
antimony
122
Sb
33
arsenic
75
As
15
phosphorus
31
P
7
84
polonium
[209]
Po
52
tellurium
128
Te
34
selenium
79
Se
16
sulfur
32
S
8
85
astatine
[210]
At
53
iodine
127
I
35
bromine
80
Br
17
chlorine
35.5
Cl
9
86
radon
[222]
Rn
54
xenon
131
Xe
36
krypton
84
Kr
18
argon
40
Ar
10
neon
Elements with atomic numbers 112-116 have been reported but not fully
authenticated
80
mercury
201
Hg
48
cadmium
112
Cd
30
70
Ga
13
aluminium
27
Al
5
20
Ne
2
14
N
5
helium
12
C
4
1
11
B
3
hydrogen
1
H
* The lanthanoids (atomic numbers 58-71) and the actinoids (atomic numbers 90-103) have been omitted.
88
87
[226]
Ra
[223]
Fr
radium
56
francium
barium
137
Ba
133
Cs
55
38
caesium
strontium
88
Sr
85
Rb
37
20
rubidium
calcium
40
Ca
39
K
19
12
potassium
magnesium
24
Mg
23
Na
11
4
sodium
beryllium
3
9
Be
7
Li
lithium
2
1
The Periodic Table of the Elements
20
A216/02
Mark Scheme
Question
Expected Answers
Where is the salt?
1 a
Realises that the rocks/ mountains / ground /
lithosphere contain the salt or salts or minerals (1)
June 2010
Marks
Additional Guidance
[3] ‘Chemicals’ not enough for the ‘salt’ marking point.
Must strongly infer that the salt is in the ground to start with.
If ground not mentioned, allow any mention of salt in
streams/rivers – assume from ground unless candidate
contradicts that assumption.
allow “Rivers pick up salt” for salt in ground.
not “salt travels down rivers”, “rain picks up salt” - not enough
How does [the salt] get into the water?
Describes extraction of material from rocks by
water e.g. salt dissolves / chemicals washed out of
rocks (1)
The extraction must be discussed, however briefly.
“The water flows over salty ground”, “rains onto cliffs and picks
up salts” both only get the first mark
What happens to the sea?
links evaporation to water or evaporation to salt left
behind /salt doesn’t evaporate [any context must
be suitable] (1)
Any context must imply that water evaporates FROM the sea.
ignore ‘Sea evaporates’
we are NOT looking for a description of the water cycle
The second marking point will often include the first, and be
worth two marks
“salt washed out of rocks” = 2
“chemicals washed out of rocks” = 1 ie not ‘chemicals’
1
A216/02
Mark Scheme
Question
1 b
Expected Answers
Marks
Additional Guidance
[2] mark each column separately, 1 mark for each correct column
small molecules
A column is correct if the correct box, and no other, is indicated,
though it may have more than one line attached to it
weak forces of attraction
c
June 2010
CH4 (1)
Total
[1]
[6]
2
A216/02
2
Mark Scheme
a
b
Danielle (1)
Andy (1)
realises the major factor is weight/mass
[2]
[1]
June 2010
either order
accept if marked on the diagram
accept “Aluminium/cable is lighter”
accept “twice the conductivity for the same weight”
If the candidate gives several reasons, look where the emphasis
lies. If in doubt, lighter should be the first in the list.
So ignore “and it is lighter”
c
d
40% (1)
[1]
[1]
...to melt a compound
...to purify a compound
...to make a compound
... to decompose a compound
 (1)
[2]
e
mark each column separately
A column is correct if the correct box, and no other, is indicated,
though it may have more than one line attached to it
Oxygen...positive...
...formed...positive...
3
A216/02
Mark Scheme
Question
2 f
Expected Answers
Al3+ + 3e−  Al
a
b
c
resistance (1)
temperature (1)
9 Ω (1)
A
Additional Guidance

Total
3
Marks
[1]
June 2010
[8]
[2]
[1]
[1]
B
look for V in a circle [not a square] with lines to either end of
thermistor [accept the ‘V’ on its side]
one end connected anywhere between A and B
the other end connect anywhere between C and D
The voltmeter maybe ‘inside’ the circuit
accept diagram at bottom of page
If there is an answer in both positions, neither crossed out, mark
the top one only.
C
Candidates answer should be on the printed diagram.
IF NOT, they may have drawn another diagram which can score
the marks.
D
Total
[4]
4
A216/02
Mark Scheme
Question
Expected Answers
voltage (1) … current (1) [in that order]
4 a
b
switch
ammeter reading
open
1
closed
2
c
5
a
b
c
First marking point
Calculation, independent of reasoning
6/12=0.5 , 6/0.5=12, 12x0.5=6
OR 3/6 = 0.5, 3/0.5 = 6, 6x0.5 = 3
No other calculations are acceptable
June 2010
Marks
Additional Guidance
[2] allow resistance for the second answer
[1] beware –BOTH responses needed for the mark
[2]
accept the calculation in words “6 is half of 12, so it’s 0.5”
Second marking point [mark independently]
Any one of the following
Correct equation written in symbol or word form
I=V/R V=IR R=V/I
any statement about current being split or shared between
resistors cannot get the second marking point.
[in series], current must be same through both
resistors [components] / voltage split across the
resistors
in series, so charge must be same through both resistors BOD
indicates that “12” is a measure of [total] resistance
or that the pd across one resistor is 3 [volts]
Total
accept any reference to “12Ω”, “resistors add up to 12”,
discusses magnetic field (1)
which is changing (1)
uses the term 'induces' or shows causal link
between changing magnetic field and voltage (1)
115 V (1)
16.8 kWh (1)
Total
[5]
[3]
accept any reference to magnetism e.g. ‘electromagnet’
ignore ‘because transformers don’t work on dc’
[1]
[1]
[5]
5
A216/02
Mark Scheme
Question
Expected Answers
6 a
any three from the following:
June 2010
Marks
Additional Guidance
[3] IGNORE ANY INCORRECT STATEMENTS, unless they actually
contradict a correct statement.
Clone - the new plant/cutting/it is a clone
Eg ignore ‘cutting is a clone of the DNA’
ignore “They clone cells that are needed”
Hormone - Links hormone/auxin to growth or
development [of any part of the plant]
ignore ‘the hormones in the plant’,
“the cutting gives off a hormone”,
“hormone stimulates plant”
‘auxin is a hormone’ – not enough for a mark
the hormone auxin helps the plant respond to light. BOD for
growth
unspecialised cells - infers that these are the cells
which actually develop/ change/ specialise/
differentiate [into something else]
accept ‘unspecialised cells grow into any cell’
ignore ‘unspecialised cells grow’
ignore “all plant cells are unspecialised”
ignore ‘the unspecialised cells in the cutting means it can grow
into something else”
ignore ‘meristem’
xylem cells – infers that these develop from the
unspecialised cells
b
mentions light/photosynthesis
Total
“unspecialised cells develop into xylem cells” = 2
“[meristem cells] develop into xylem cells” = 1
[1]
[4]
6
ignore any mention of ‘Sun’, but accept ‘sunlight’
reject incorrect statements, e.g.Plant gets its food from the
sunlight
A216/02
Mark Scheme
Question
7 a
Expected Answers
cells divide

(1)

(1)
June 2010
Marks
Additional Guidance
[2] If more than two boxes ticked deduct a mark for each incorrect
response. Candidates may not score less than zero.
chromosomes are copied
number of organelles increases
number of nuclei stays the same
copies of chromosomes separate
b
i
gametes (1)
[1]
accept sex cells, egg (cell), sperm (cell), haploid, reproductive
cells
reject zygote, embryo
If more than one answer – mark the first one
[1]
ii
The larger cell has more...
The smaller cell has more...
They have the same number...
 (1)
The first cell to form has more...
c
[1]
i
All genes are activated.
All genes are inactivated.
All active genes are inactivated.
Some inactive genes are reactivated.  (1)
7
A216/02
Question
7 c ii
Mark Scheme
Expected Answers
Marks
[1]
Stem cells have twice...
Stem cells are specialised.
Stem cells are unspecialised.
 (1)
Stem cells have half...
Total
[6]
8
June 2010
Additional Guidance
A216/02
Mark Scheme
Question
T
8 a
G
T
C
A
b
Expected Answers
Marks
[1]
[1]
to make...different
to hold the strands...together

to allow exact copies...

to allow proteins to join...
...code for a different amino acid
[2]
c
D
A
E
F
uses D, A, E in any order = 1 mark
order correct = 1 mark
Total
[4]
9
June 2010
Additional Guidance
beware – one mark for BOTH answers
H
GENERAL CERTIFICATE OF SECONDARY EDUCATION
A216/02
TWENTY FIRST CENTURY SCIENCE
ADDITIONAL SCIENCE A
Unit 2: Modules B5 C5 P5 (Higher Tier)
* O C E / 2 5 6 3 5 *
Candidates answer on the question paper.
A calculator may be used for this paper.
Monday 24 January 2011
Afternoon
OCR supplied materials:
None
Duration: 40 minutes
Other materials required:
•
Pencil
•
Ruler (cm/mm)
*
A
2
1
6
0
2
*
INSTRUCTIONS TO CANDIDATES
•
•
•
•
•
•
Write your name, centre number and candidate number in the boxes above. Please write
clearly and in capital letters.
Use black ink. Pencil may be used for graphs and diagrams only.
Read each question carefully. Make sure you know what you have to do before starting
your answer.
Write your answer to each question in the space provided. Additional paper may be
used if necessary but you must clearly show your candidate number, centre number and
question number(s).
Answer all the questions.
Do not write in the bar codes.
INFORMATION FOR CANDIDATES
•
•
•
•
•
The number of marks is given in brackets [ ] at the end of each question or part
question.
The total number of marks for this paper is 42.
A list of physics equations is printed on page 2.
The Periodic Table is printed on the back page.
This document consists of 20 pages. Any blank pages are indicated.
© OCR 2011 [D/103/3775]
DC (SHW 00562 12/09) 25635/4
OCR is an exempt Charity
Turn over
2
TWENTY FIRST CENTURY SCIENCE EQUATIONS
Useful Relationships
Explaining Motion
speed =
distance travelled
time taken
momentum = mass × velocity
change of momentum = resultant force × time for which it acts
work done by a force = force × distance moved by the force
change in energy = work done
change in GPE = weight × vertical height difference
1
kinetic energy = 2 × mass × [velocity]2
Electric Circuits
resistance =
voltage
current
voltage across primary coil
number of turns in primary coil
=
voltage across secondary coil
number of turns in secondary coil
energy transferred = power × time
power = potential difference × current
efficiency =
energy usefully transferred
× 100%
total energy supplied
The Wave Model of Radiation
wave speed = frequency × wavelength
© OCR 2011
3
Answer all the questions.
1
Air is a mixture of different gases.
Each year we extract thousands of tonnes of gases from the air.
Many of these gases are very useful.
(a) We extract each gas by cooling the air until the gas turns into a liquid.
Different gases turn into liquids at different temperatures.
Here is some information about the gases.
gas
melting point
in K
boiling point
in K
argon
84
87
nitrogen
63
77
oxygen
55
90
water vapour
273
373
Which gas turns from a gas into a liquid at the lowest temperature?
answer ......................................................... [1]
(b) Oxygen is made of molecules.
Liquid oxygen turns into a gas at extremely low temperatures.
Explain why.
Use your understanding of forces and molecules in your answer.
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
............................................................................................................................................ [3]
[Total: 4]
© OCR 2011
Turn over
4
2
We have extracted iron since the Iron Age.
We still use the same method.
We extract the iron by heating iron oxide with carbon in a furnace.
Different reactions take place in the furnace.
(a) In one reaction, carbon takes the oxygen away from iron oxide.
(i)
Fill in the boxes to write a word equation for this reaction.
+
+
[2]
(ii)
combined
Use words from this list to complete the sentences below.
electrolysed
melted
oxidised
precipitated
reduced
When carbon gains oxygen we say that the carbon has been ………………………… .
When a metal oxide loses oxygen we say that the metal has been ………………………… .
[1]
(iii)
Another reaction for making iron is between iron oxide and carbon monoxide gas.
Put numbers in the boxes to balance the equation for this reaction.
Fe2O3 +
© OCR 2011
CO
Fe + 3CO2
[2]
5
(b) Not all metals are extracted by heating their ores with carbon.
Some metals are extracted by electrolysis.
metal
lead
magnesium
aluminium
calcium
cobalt
iron
extracted by
heating with carbon
electrolysis
electrolysis
electrolysis
heating with carbon
heating with carbon
melting point
of the metal
in K
601
922
933
1112
1768
1808
Use the table to decide which three metals are likely to be more reactive than the others.
answer .................................... and .................................... and ..................................... [1]
[Total: 6]
© OCR 2011
Turn over
6
3
Scientists are worried about the increasing amounts of carbon in our atmosphere.
Look at the diagram of the carbon cycle.
The numbers show how many gigatonnes of carbon move in each direction every year.
atmosphere
102
102
5
land life
90
92
fossil fuels
36
40
oceans
ocean life
(a) The amount of carbon in the atmosphere is increasing.
By how many gigatonnes does it increase every year?
Put a ring around the correct answer.
2
3
5
90
102
[1]
(b) Most of the carbon in the atmosphere is in the form of carbon dioxide.
The diagram shows that 92 gigatonnes of carbon dissolve in the oceans every year.
How many gigatonnes of carbon dioxide does this represent?
Put a ring around the answer.
12
× 92
44
12
× 92
32
32
× 92
12
44
× 92
12
[1]
(c) Carbon dioxide dissolves in seawater.
Carbon dioxide in solution reacts with water to form ions.
(i)
Put state symbols in the boxes to complete the equation for this reaction.
CO2(aq) + H2O
(ii)
H+
+ HCO3–
[1]
Mary wants to see if sea water really is an ionic solution.
What could she measure to show that it contains ions?
.................................................................................................................................... [1]
[Total: 4]
© OCR 2011
7
4
Mains electricity is produced by generators in power stations.
Each generator contains a magnet and a coil of wire.
(a) Describe how the magnet and the coil of wire are used to make electricity.
Include the name of the process.
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
............................................................................................................................................ [2]
(b) State two ways that you could increase the voltage of the electricity produced by a generator.
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
............................................................................................................................................ [2]
[Total: 4]
© OCR 2011
Turn over
8
5
Charles puts this circuit together.
lamp
(a) The lamp glows.
Here are some statements about the circuit.
Which two statements, when taken together, explain why the lamp glows?
Put ticks (✓) in the boxes next to the two statements required.
The wires have some resistance.
The current in the lamp heats it up.
The battery pushes charges through the lamp.
The wires have charges that are free to move.
Only the lamp has charges that are free to move.
[2]
© OCR 2011
9
(b) Charles adds an ammeter to measure the current in the lamp.
A
6V
The lamp has a power of 3 W.
What does the ammeter read?
Put a ring around the correct answer.
0.5 A
2.0 A
6.0 A
18 A
[1]
(c) There is not enough current in the circuit to make the lamp glow brightly.
Charles adds another battery and the lamp glows brightly.
Complete the sentences. Choose words from this list.
decreases
increases
parallel
series
Charles adds the second battery in ………………………… to the first one.
This ………………………… the potential difference across the lamp.
[1]
[Total: 4]
© OCR 2011
Turn over
10
6
Fleur assembles this circuit.
A
(a) The resistor, ammeter and lamp are in series.
Explain why all three components have exactly the same current.
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
............................................................................................................................................ [2]
(b) Fleur wants to add a voltmeter to measure the potential difference across the resistor.
(i)
Draw on this circuit diagram to show how Fleur should connect the voltmeter.
A
[1]
© OCR 2011
11
(ii)
Fleur finds that the potential difference across the resistor is 6 V.
The potential difference across the battery is 9 V.
The ammeter reads 0.5 A.
What is the resistance of the lamp?
Put a ring around the correct answer.
6X
12 X
18 X
30 X
[1]
[Total: 4]
© OCR 2011
Turn over
12
7
Zara does an experiment with a pair of balloons on strings.
She rubs each balloon against her clothing.
Zara then holds the balloons up by their strings.
Complete this explanation of why the balloons hang like this.
Choose the best words from the list.
atoms
shield
attract
negative
different
neutral
electrons
positive
identical
protons
repel
The rubbing transfers some …………………… from each balloon to Zara’s clothing so,
this leaves each balloon with a …………………… charge.
The reason the balloons …………………… each other is because they have ……………………
kinds of charge.
[2]
[Total: 2]
© OCR 2011
13
8
Martin is studying mayflies.
He looks at an adult mayfly and a mayfly nymph.
adult mayfly
(a) (i)
mayfly nymph
The adult mayfly lays eggs in the water.
The eggs hatch into nymphs.
The nymphs grow bigger.
adult
P
nymph
gamete
gamete from
another adult
Q
fertilised egg
Complete the sentences.
The type of cell division at P is …………………… , which makes cells that have
…………………… number of chromosomes as the adult cells.
The type of cell division at Q is …………………… , which makes cells that have
…………………… number of chromosomes as the fertilised egg.
© OCR 2011
[2]
Turn over
14
(ii)
The statements A to D are about processes of the cell cycle.
Put the letters A, B, C and D in the correct column of the table to show whether the
processes occur during cell growth or cell division.
A
the numbers of organelles increase
B
copies of the chromosomes separate
C
new strands of DNA form
D
strands of each DNA molecule separate
cell
growth
cell
division
[2]
© OCR 2011
15
(b) Once a nymph grows into an adult, it has different specialised tissues.
Five people are asked to explain this.
Jeremy
All of the genes are
switched on and
become active.
Teresa
Some of the genes are
lost from the cells.
Vick
Some of the active genes
are switched off.
Cassie
Andrew
Some genes are added
to the cells.
Some of the inactive
genes are activated.
Which two people give the best explanations?
answer ........................................................... and ........................................................... [1]
[Total: 5]
© OCR 2011
Turn over
16
9
Susie sees a plant she likes in a friend’s garden.
She asks if she can take a cutting.
(a) Which part of her friend’s plant should Susie use to grow an identical plant?
Put a ring around the correct answer.
flower
fruit
seed
stem
[1]
(b) Susie dips the bottom of her cutting in some rooting powder.
She then puts the cutting into a pot of soil.
What does the rooting powder contain that helps the cutting grow roots?
............................................................................................................................................ [1]
(c) Susie’s cutting grows into a new plant.
Which statements explain how this is possible?
Put ticks (✓) in the boxes next to the two correct answers.
Some unspecialised cells develop into other tissues.
Some unspecialised cells develop into organs.
Some xylem cells become phloem cells.
Some plant cells become unspecialised.
Some leaf cells become root cells.
[2]
© OCR 2011
17
(d) Susie keeps her new plant in a pot near a window.
The shoot grows towards the light.
Draw one line to join the effect of light on the distribution of auxin to its effect on the cells in
the shoot.
effect of light
effect on the cells
more auxin on
lit side
makes these cells
grow more slowly
or
or
more auxin on
shaded side
makes these cells
grow more quickly
[1]
[Total: 5]
© OCR 2011
Turn over
18
10 DNA carries genetic information.
(a) What is the name given to the shape of DNA?
...........................................................................................................................................
[1]
(b) DNA in one part of the cell codes for the production of molecules in another part of the cell.
Explain how this happens.
In your answer write about
•
•
•
the code in DNA
different sites in the cell
the type of molecule produced.
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
............................................................................................................................................ [3]
[Total: 4]
END OF QUESTION PAPER
© OCR 2011
19
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department of the University of Cambridge.
© OCR 2011
© OCR 2011
89
actinium
[227]
Ac*
57
lanthanum
139
La*
39
yttrium
89
Y
21
scandium
45
Sc
name
104
rutherfordium
[261]
Rf
72
hafnium
178
Hf
40
zirconium
91
Zr
22
titanium
48
Ti
105
106
seaborgium
[266]
Sg
[262]
Db
dubnium
74
tungsten
184
W
42
molybdenum
96
Mo
24
chromium
52
Cr
73
tantalum
181
Ta
41
niobium
93
Nb
23
vanadium
51
V
atomic (proton) number
relative atomic mass
atomic symbol
Key
107
bohrium
[264]
Bh
75
rhenium
186
Re
43
108
hassium
[277]
Hs
76
osmium
190
Os
44
ruthenium
101
Ru
[98]
Tc
technetium
26
iron
56
Fe
25
manganese
55
Mn
cobalt
59
Co
nickel
59
Ni
copper
63.5
Cu
zinc
65
Zn
boron
carbon
nitrogen
oxygen
16
O
6
fluorine
19
F
7
4
He
0
109
meitnerium
[268]
Mt
77
iridium
192
Ir
45
rhodium
103
Rh
27
110
darmstadtium
[271]
Ds
78
platinum
195
Pt
46
palladium
106
Pd
28
111
roentgenium
[272]
Rg
79
gold
197
Au
47
silver
108
Ag
29
The relative atomic masses of copper and chlorine have not been rounded to the nearest whole number.
81
thallium
204
Tl
49
indium
115
In
31
gallium
tin
82
lead
207
Pb
50
119
Sn
32
germanium
73
Ge
14
silicon
28
Si
6
83
bismuth
209
Bi
51
antimony
122
Sb
33
arsenic
75
As
15
phosphorus
31
P
7
84
polonium
[209]
Po
52
tellurium
128
Te
34
selenium
79
Se
16
sulfur
32
S
8
85
astatine
[210]
At
53
iodine
127
I
35
bromine
80
Br
17
chlorine
35.5
Cl
9
86
radon
[222]
Rn
54
xenon
131
Xe
36
krypton
84
Kr
18
argon
40
Ar
10
neon
Elements with atomic numbers 112-116 have been reported but not fully
authenticated
80
mercury
201
Hg
48
cadmium
112
Cd
30
70
Ga
13
aluminium
27
Al
5
20
Ne
2
14
N
5
helium
12
C
4
1
11
B
3
hydrogen
1
H
* The lanthanoids (atomic numbers 58-71) and the actinoids (atomic numbers 90-103) have been omitted.
88
87
[226]
Ra
[223]
Fr
radium
56
francium
barium
137
Ba
133
Cs
55
38
caesium
strontium
88
Sr
85
Rb
37
20
rubidium
calcium
40
Ca
39
K
19
12
potassium
magnesium
24
Mg
23
Na
11
4
sodium
beryllium
3
9
Be
7
Li
lithium
2
1
The Periodic Table of the Elements
20
A216/02
Mark Scheme
Question
1
(a)
(b)
2
(a)
Expected Answers
nitrogen (1)
Any three from:

forces between molecules are weak (1);

molecules are small (1);

(molecules) easy to separate/break bonds/
overcome forces between/ move apart (1);

gives a reason for condensation at low
temperature – eg less energy, slower
speed of molecular movement (1)
Total
(i)
iron oxide +
carbon
carbon dioxide
(b)
3
[4]
[2]
[1]
(iii) 3 (1)
2 (1)
magnesium, aluminium, calcium (1)
[2]
Additional Guidance
Left hand side iron oxide and carbon in either order.
Right hand side iron and carbon dioxide in either order.
All four boxes correct = 2 marks
Any two or three boxes correct = 1 mark
Allow carbon monoxide or carbon oxide as alternatives to
carbon dioxide.
Reject chemical symbols.
Both must be correct for one mark.
Accept other forms of the verbs, eg oxidisation, oxidising if
clear.
+
(ii) oxidised
reduced
Accept in any order.
If lead, cobalt or iron is one of the three, then no marks.
[1]
Total
[6]
[1]
[1]
l
aq
aq
(ii) (electrical) conductivity (1)
Total
[1]
All correct for one mark; allow upper case letters L, AQ.
Ignore any brackets.
[1]
[4]
Ignore pH, electrolysis.
3 (1)
(a)
(b)
(c)
 iron
Marks
[1]
[3]
January 2011
44
 92 (1)
12
(i)
4
A216/02
Question
4
(a)
(b)
Mark Scheme
Expected Answers
Marks
Additional Guidance
the magnet spins/rotates/turns inside the coil (1)
Not moving the magnet in and out of the coil.
[2]
called (electromagnetic) induction (1)
Accept induced, but not electromagnetic on its own.
Accept coil spinning as alternative to magnet spinning.
Apply list principle if more than two suggestions given (General
[2]
guidance point 8).
Any two from:
Accept spin/move coil faster as alternative to spin the magnet

spin the magnet faster (1);
faster.

use a stronger magnet (1);
Not bigger magnet, more magnets.

more (turns of) wire in the coil (1);
Accept larger coil.

put iron inside the coil (1)
Total
5
[4]
[2]
(a)
(b)
(c)
January 2011
The current in the lamp heats it up.

(1)
The battery pushes charges...

(1)
0.5 A (1)
series
increases
[1]
[1]
Total
Both correct = 1 mark
[4]
5
A216/02
Mark Scheme
Question
6
(a)
(b)
Expected Answers
current is (rate of) flow of charge/electrons/all
parts of circuit have mobile charges (1);
only one path for charge/current or
charges/electrons are not used up as they enter
and leave components (1)
Marks
Additional Guidance
First marking point is realising that current is due to charges
[2]
moving.
Second marking point is either realising that charges do not get
used up or lost, or that there are no branches/parallel circuits
for them to go elsewhere
Look for a correct symbol (circle with V inside), connected to
either side of the resistor only.
[1]
(i)
January 2011
One lead must connect between points A and B.
The other lead must connect between points C and D.
The voltmeter may be drawn either inside or outside the circuit
(ii) 6 
(1)
Total
7
electrons
positive
repel
identical
Total
[1]
[4]
[2]
All four correct = 2 marks
Any two or three correct = 1 mark
[2]
6
A216/02
Mark Scheme
Question
8
(a) (i)
Expected Answers
meiosis, half the/23
mitosis, the same/46
Marks
Additional Guidance
All four correct = 2 marks
[2]
Two or three correct = 1 mark
One correct = 0 marks
All four correct = 2 marks
[2]
Two or three correct = 1 mark
One correct = 0 marks
(ii)
Cell
growth
A
C
D
(b)
Cell
division
B
Vick and Andrew (1)
9
(a)
(b)
(c)
Both names correct in either order = 1 mark
[1]
[5]
[1]
[1]
[2]
Total
stem (1)
(plant/growth ) hormone (1)
Some unspecialised cells...tissues.

(1)
Some unspecialised cells...organs.

(1)
Accept auxin
Correct pattern for [2]
One mistake for [1]
A mistake is

an extra tick

a missing tick

a tick in the wrong place
7
January 2011
A216/02
Question
(d)
Mark Scheme
Expected Answers
more auxin on
shaded side
Marks
Additional Guidance
If more than the one correct link is drawn, no marks.
[1]
makes these cells
grow more quickly
Total
10
January 2011
(a)
double helix (1)
(b)
Any three from:
links DNA code to order of bases (1);
(DNA stays where it is and) the code carried by
a copy (of the gene)/RNA (1)
sites – to the cytoplasm/ribosomes (1)
type – amino acids/protein is made (1)
Total
[5]
[1]
Do not accept “helix” or ‘spiral helix’: must be double helix
owtte
Neutral – DNA is in the nucleus.
May list A,T/U,C,G or may state that pairs match for this mark.
[3]
[4]
8
H
GENERAL CERTIFICATE OF SECONDARY EDUCATION
A216/02
TWENTY FIRST CENTURY SCIENCE
ADDITIONAL SCIENCE A
Unit 2: Modules B5 C5 P5 (Higher Tier)
* O C E / 3 3 0 3 2 *
Tuesday 28 June 2011
Morning
Candidates answer on the question paper.
A calculator may be used for this paper.
OCR supplied materials:
None
Duration: 40 minutes
Other materials required:
•
Pencil
•
Ruler (cm/mm)
*
A
2
1
6
0
2
*
INSTRUCTIONS TO CANDIDATES
•
•
•
•
•
•
Write your name, centre number and candidate number in the boxes above. Please write
clearly and in capital letters.
Use black ink. Pencil may be used for graphs and diagrams only.
Read each question carefully. Make sure you know what you have to do before starting
your answer.
Write your answer to each question in the space provided. Additional paper may be
used if necessary but you must clearly show your candidate number, centre number and
question number(s).
Answer all the questions.
Do not write in the bar codes.
INFORMATION FOR CANDIDATES
•
•
•
•
•
The number of marks is given in brackets [ ] at the end of each question or part
question.
The total number of marks for this paper is 42.
A list of physics equations is printed on page 2.
The Periodic Table is printed on the back page.
This document consists of 20 pages. Any blank pages are indicated.
© OCR 2011 [D/103/3775]
DC (SHW 00621 4/10) 33032/3
OCR is an exempt Charity
Turn over
2
TWENTY FIRST CENTURY SCIENCE EQUATIONS
Useful Relationships
Explaining Motion
speed =
distance travelled
time taken
momentum = mass × velocity
change of momentum = resultant force × time for which it acts
work done by a force = force × distance moved in the direction of the force
change in energy = work done
change in GPE = weight × vertical height difference
1
kinetic energy = 2 × mass × [velocity]2
Electric Circuits
resistance =
voltage
current
voltage across primary coil
number of turns in primary coil
=
voltage across secondary coil
number of turns in secondary coil
energy transferred = power × time
power = potential difference × current
efficiency =
energy usefully transferred
× 100%
total energy supplied
The Wave Model of Radiation
wave speed = frequency × wavelength
© OCR 2011
3
Answer all the questions.
1
When the Romans came to Britain they extracted lead from mines in Somerset.
Lead ore contains lead sulfide.
(a) The first stage in extracting the lead is to heat the lead sulfide with oxygen.
Fill in the boxes to balance the equation for this reaction.
2PbS
+
O2
PbO
+
SO2
[2]
(b) The relative atomic mass of lead is 207.
The relative atomic mass of sulfur is 32.
Use this information to calculate the mass of lead that can be obtained from 71.7 tonnes of
pure lead sulfide, PbS.
mass = ................................ tonnes [2]
(c) The Romans could extract 10 tonnes of lead from 100 tonnes of ore.
A modern mine can only extract 3 tonnes of lead from 100 tonnes of ore.
Suggest why modern mines get less lead from their ore than the Romans did.
Puts ticks (✓) in the boxes next to the two statements that best explain why.
Roman ores were easier to get at.
Romans mined higher quality ores.
Romans were more skilled at getting the lead from the ore.
There are no easily mined ores left which have high quantities of lead.
We no longer need to get so much lead out of the ore.
Roman ores did not contain impurities.
[1]
© OCR 2011
Turn over
4
(d) Some substances are left over after the lead is extracted.
One of these is silicon dioxide – silicon dioxide is a solid.
Sulfur dioxide is also produced – sulfur dioxide is a gas.
Complete the table about solid silicon dioxide and sulfur dioxide gas.
For each description put one tick (✓) in the correct column to show whether it is true
for silicon dioxide only, sulfur dioxide only, both or neither
description
silicon
dioxide only
sulfur dioxide
only
both
neither
has a high melting point
has a low melting point
has covalent bonds
has ionic bonds
is a giant structure
is a simple molecular compound
has weak forces between molecules
[4]
© OCR 2011
5
(e) The chart shows the main uses of lead.
pigments &
chemicals
12 %
lead sheet for
roofing 7 %
other uses 10 %
lead electrodes in
car batteries
71 %
About 8500 million tonnes of lead are used every year.
Only 4000 million tonnes of this lead are produced from ore every year.
Suggest where the remaining lead comes from.
Explain your reasoning.
...................................................................................................................................................
...................................................................................................................................................
............................................................................................................................................ [2]
(f)
Lead conducts electricity.
Which of the diagrams, A, B, C or D, best shows the structure of lead?
‘sea’ of ions
‘sea’ of electrons
+
+
+
+
+
+
+
+
A
+
–
–
–
+
+
+
+
–
+
+
–
–
–
B
+
–
–
–
–
–
–
–
–
–
C
–
–
+
–
–
+
–
+
–
–
D
answer ........................ [1]
© OCR 2011
Turn over
6
(g) Lead bromide, PbBr2, is an ionic compound.
Sarah passes an electric current through melted lead bromide.
It breaks down into bromine gas and molten lead.
(i)
The symbol for a lead ion is Pb2+.
Write the symbol for a bromide ion.
answer ........................ [1]
(ii)
Draw labelled arrows on the diagram to show
•
•
the movement of a lead ion
the movement of a bromide ion.
positive
electrode
negative
electrode
bromide
ion
lead ion
[1]
[Total: 14]
© OCR 2011
7
2
Pete pushes a magnet into a tube.
wire
N
tube
S
magnet
A
(a) There is a coil of wire around the tube.
Complete the sentences. Choose from these words.
charge
current
voltage
power
As the magnet moves into the tube, a …………………… is induced across the ends of the
coil.
This results in a …………………… in the ammeter.
[2]
(b) Here are some ways of changing the reading of the ammeter.
Put ticks (✓) in the boxes next to the two ways which would increase the reading.
Increase the length of the tube.
Decrease the length of the tube.
Move the magnet more slowly into the tube.
Move the magnet more quickly into the tube.
Increase the number of turns of wire in the coil.
Decrease the number of turns of wire in the coil.
[2]
[Total: 4]
© OCR 2011
Turn over
8
3
This circuit has three identical resistors, A, B and C, in series with a battery.
A
12 V
B
C
(a) Here are some statements about the circuit.
Put a tick (✓) in the box next to the correct statement.
Resistor C has 0 V across it.
Resistor B has 12 V across it.
Resistor A has a greater current than the other resistors.
All three resistors have the same current.
[1]
(b) Resistors A, B and C get hot. Explain why.
Use these words in your answer.
atoms
electrons
energy
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
............................................................................................................................................ [3]
© OCR 2011
9
(c) The three identical resistors are now connected in parallel to the battery.
A
12 V
A
B
C
The ammeter in the circuit reads 6 A.
What is the heating power of resistor C?
Put a ring around the correct answer.
2W
6W
8W
24 W
72 W
[1]
[Total: 5]
© OCR 2011
Turn over
10
4
Jo builds a circuit with a battery, a lamp and a switch in series.
(a) Complete the circuit diagram.
Use the correct symbols for the lamp and the switch.
[1]
(b) Complete the sentences by putting a ring around the correct words in bold.
Before Jo closes the switch, it has a very high charge / current / power / resistance.
Closing the switch allows the battery / lamp / switch / wires
the circuit.
to push charge around
This movement of charge in the wires is called a current / power / resistance / voltage.
[3]
(c) The lamp does not light up when the switch is open.
Put a tick (✓) in the box next to the correct reason why.
There is only charge in the switch when it is closed.
Charge is not able to flow through part of the open switch.
The charge gets used up as it passes through the open switch.
The potential difference across the open switch is reduced to zero.
[1]
[Total: 5]
© OCR 2011
11
BLANK PAGE
Question 5 starts on page 12
PLEASE DO NOT WRITE ON THIS PAGE
© OCR 2011
Turn over
12
5
Labradors and poodles are breeds of dog.
A labrador mates with a poodle and produces a puppy.
The puppy has chromosomes from both the labrador and the poodle.
(a) The labrador has 78 chromosomes in each body cell.
The table shows chromosome numbers in each body cell of the labrador, the poodle and the
puppy.
chromosomes
in labrador
chromosomes
in poodle
chromosomes
in puppy
A
78
78
156
B
78
78
78
C
78
46
46
D
78
39
39
Which row, A, B, C or D, is correct?
answer ........................ [1]
© OCR 2011
13
(b) The puppy cells have chromosomes from both parents.
Explain why the cells have chromosomes from both parents.
Include in your answer
•
•
•
what type of cell division produces gametes
what happens to the chromosome number when a gamete is formed
what happens when the gametes fuse.
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
............................................................................................................................................ [3]
[Total: 4]
© OCR 2011
Turn over
14
6
The snowshoe hare lives in forests which have a lot of snow in winter.
(a) The cells of the snowshoe hare contain the genetic code.
The genetic code controls the formation of proteins in each cell.
Complete the sentences.
The genetic code is found in the cell ....................................................... .
Proteins are formed in the cell ....................................................... .
The genetic code is found on DNA.
The number of strands in a DNA molecule is ....................................................... .
The number of different bases in DNA is ....................................................... .
[2]
(b) In the summer the snowshoe hare has a dark coat, which is due to certain proteins being
produced by hair-producing cells.
In winter it grows a white coat with different proteins colouring the hair.
Explain how the same animal can produce different colours of coat at different times of the
year.
In your answer use ideas about genes and proteins.
...................................................................................................................................................
...................................................................................................................................................
............................................................................................................................................ [2]
© OCR 2011
15
(c) A scientist tests a sample of snowshoe hare DNA. She finds these proportions of two of the
bases.
base C
base A
23 %
27 %
What proportion of the bases will she find to be base T?
Put a ring around the correct answer.
23 %
25 %
27 %
46 %
50 %
[1]
[Total: 5]
© OCR 2011
Turn over
16
7
Harry does an experiment with some plant tips.
He cuts the tip from a shoot and places it on a block of agar for several hours.
He then throws away the tip.
He places the agar block over part of the end of the shoot where the tip was cut from.
tip
agar block
shoot
shoot
with tip
removed
(a) The shoot is left to grow.
Which way will it grow?
Choose from A, B, C and D.
A
B
C
D
tall and straight
tall and
to the left
tall and
to the right
short and
stumpy
answer ........................ [1]
© OCR 2011
17
(b) What is the correct explanation for this result?
Put ticks (✓) in the boxes next to the two correct answers.
Agar stopped all of the light to one side of the tip.
Auxin diffused from the cut tip into the agar.
Auxin diffused from the cut shoot into the agar.
The side of the shoot with most auxin grew more.
The side of the shoot with most auxin grew less.
Auxin made no difference to the growth of the shoot.
Auxin absorbed more light under the agar.
[2]
(c) When growing shoots receive light from one side only, they grow towards the light.
This is called phototropism.
Phototropism increases a plant’s chance of survival.
Complete the sentence.
Use a word from the list.
meiosis
photosynthesis
pollination
reproduction
The increased chance of survival is due to the increased rate
of ..................................................... .
[1]
© OCR 2011
Turn over
18
(d) Harry’s shoots grow into full sized plants.
A group of students were asked how plants grow.
Reuben
Zarah
Plants keep on growing
by meiosis.
Plants’ meristems
fuse and stop growing.
Wendy
Plants keep on growing
in height by mitosis.
David
Plants stop all mitosis
when they are fully
grown.
Which student gave the correct answer?
answer ........................................................ [1]
[Total: 5]
END OF QUESTION PAPER
© OCR 2011
19
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department of the University of Cambridge.
© OCR 2011
© OCR 2011
89
actinium
[227]
Ac*
57
lanthanum
139
La*
39
yttrium
89
Y
21
scandium
45
Sc
name
104
rutherfordium
[261]
Rf
72
hafnium
178
Hf
40
zirconium
91
Zr
22
titanium
48
Ti
105
106
seaborgium
[266]
Sg
[262]
Db
dubnium
74
tungsten
184
W
42
molybdenum
96
Mo
24
chromium
52
Cr
73
tantalum
181
Ta
41
niobium
93
Nb
23
vanadium
51
V
atomic (proton) number
relative atomic mass
atomic symbol
Key
107
bohrium
[264]
Bh
75
rhenium
186
Re
43
108
hassium
[277]
Hs
76
osmium
190
Os
44
ruthenium
101
Ru
[98]
Tc
technetium
26
iron
56
Fe
25
manganese
55
Mn
cobalt
59
Co
nickel
59
Ni
copper
63.5
Cu
zinc
65
Zn
boron
carbon
nitrogen
oxygen
16
O
6
fluorine
19
F
7
4
He
0
109
meitnerium
[268]
Mt
77
iridium
192
Ir
45
rhodium
103
Rh
27
110
darmstadtium
[271]
Ds
78
platinum
195
Pt
46
palladium
106
Pd
28
111
roentgenium
[272]
Rg
79
gold
197
Au
47
silver
108
Ag
29
The relative atomic masses of copper and chlorine have not been rounded to the nearest whole number.
81
thallium
204
Tl
49
indium
115
In
31
gallium
tin
82
lead
207
Pb
50
119
Sn
32
germanium
73
Ge
14
silicon
28
Si
6
83
bismuth
209
Bi
51
antimony
122
Sb
33
arsenic
75
As
15
phosphorus
31
P
7
84
polonium
[209]
Po
52
tellurium
128
Te
34
selenium
79
Se
16
sulfur
32
S
8
85
astatine
[210]
At
53
iodine
127
I
35
bromine
80
Br
17
chlorine
35.5
Cl
9
86
radon
[222]
Rn
54
xenon
131
Xe
36
krypton
84
Kr
18
argon
40
Ar
10
neon
Elements with atomic numbers 112-116 have been reported but not fully
authenticated
80
mercury
201
Hg
48
cadmium
112
Cd
30
70
Ga
13
aluminium
27
Al
5
20
Ne
2
14
N
5
helium
12
C
4
1
11
B
3
hydrogen
1
H
* The lanthanoids (atomic numbers 58-71) and the actinoids (atomic numbers 90-103) have been omitted.
88
87
[226]
Ra
[223]
Fr
radium
56
francium
barium
137
Ba
133
Cs
55
38
caesium
strontium
88
Sr
85
Rb
37
20
rubidium
calcium
40
Ca
39
K
19
12
potassium
magnesium
24
Mg
23
Na
11
4
sodium
beryllium
3
9
Be
7
Li
lithium
2
1
The Periodic Table of the Elements
20
A216/01
Mark Scheme
Answer
Question
1 a
Pbs
PBs
PbS
Mark
1
Guidance
PbSO4
2
b
ignore references to the amount of lead, the answer must be in
terms of amount of impurities
idea of more impurities (in modern ores) ORA ;
if refers to modern ores
accept have less lead sulfide
not have less lead
idea of the good / Roman / high grade ores have
been used up ORA ;
gives a reason for the lack of high grade ore
suggests what the other impurities might be
1
c
lead oxide + lead sulfide  lead + sulfur dioxide
d
June 2011
description
high melting
point
low melting point
silicon
dioxide
only
sulfur
dioxide
only
4


ionic bonds
simple molecular
compound
weak forces
between
neither

covalent bonds
giant structure
both
reactants in either order
products in either order




1
7 ticks correct = 4
6 or 5 ticks correct = 3
4 or 3 ticks correct = 2
2 ticks correct = 1
1 tick = 0
A216/01
Mark Scheme
Question
e
f
Answer
use
property
line
water
troughs
lead has a
low melting
point
heavy
weights
lead is
dense
filling
gaps in
stones
lead is
malleable
i
Mark
all three lines correct = 2
2
2 or 1 lines correct = 1
June 2011
Guidance
1
2.125%
47%
50%
53%
3
ii any three from:
bubbles / fizzes / red-brown / smell;
ties bromine OR lead formation to electrodes;
accept bromine formed at anode / positive electrode = 2
OR
accept lead formed at cathode / negative electrode = 2
to the correct electrode;
lead collects at the bottom;
Total
[14]
2
A216/01
Mark Scheme
Answer
Question
2 a
b
c
Mark
1
2
lamp
pushes charge...
switch
heats up
battery
changes resistance
any two from:
(closed switch) allows charge to move AW;
this may be implied
b
c
d
accept AW for delivering e.g. taking / giving
[5]
1
a
voltage (1)
i 6 (V) (1)
ii 18 (W) (1)
power (1)
Total

all three lines correct = 2
2 or 1 lines correct = 1
accept electrons instead of charge
not electricity instead of charge
delivering energy (from the battery to the lamp);
Total
All three resistors have the same ...
Guidance
2
(the charge moves) around the circuit AW;
3
June 2011
(1)
1
1
1
1
[5]
3
A216/01
Mark Scheme
Answer
Question
4 a
Mark
2
June 2011
Guidance
voltage (1)
current (1)
2
b
Move the magnet more quickly into ... 
(1)

(1)
Increase the number of turns ...
Total
5
[4]
2
a
two (1)
four (1)
b
i
1
nucleus (1)
accept mitochondria / chromosomes / genes
1
ii
accept ribosome
cytoplasm (1)
Total
[4]
4
A216/01
Mark Scheme
Question
B (1)
6 a
b
any three from:
Answer
June 2011
Mark
Guidance
if no answer given, check the table
1
NB ‘Gametes fuse’ is in the stem
3
meiosis (1)
accept mis-spelling of meiosis [ie but not if a ‘T’ is present!]
accept ‘reduction division’ instead of meiosis
unless stated otherwise, assume that the candidate is referring to
gametes as the product of cell division
idea that [gametes have] 39 chromosomes /
haploid / half the chromosomes (1)
this mark not available if candidate implies chromosomes come
from both parents
ignore ‘cells / chromosomes split in half’
allow ‘half the genetic information’
links [gamete fusion] to zygote / embryo (1)
[gametes fuse] to give full number / diploid / double
the number of chromosomes (1)
‘gametes fuse and double the number of chromosomes’ = 1
ignore ‘gametes double the number of chromosomes’
ignore ‘half the chromosomes from each parent’ in the context of
this marking point
references to fusing and to halving must be in the correct context
Total
[4]
5
A216/01
Mark Scheme
Question
Answer
(plant) hormone (1)
7 a
Mark
accept auxins
2
to help roots to form/grow (1)
2
b
tissue
phloem
property
can develop into
different types of
cells
meristem
cannot develop
into different types
of cells
xylem
1
c
… some cells… mitosis

(1)
1
d
Chromosomes separate

(1)
Total
[6]
Paper Total
[42]
6
June 2011
Guidance
allow ‘rooting powder’ as a 1 mark answer
3 correct lines = 2 marks
1 or 2 correct lines = 1 mark