Year 7 End of Unit Test
Time:
50 minutes
Marks:
60 marks
Name:
________________________
Class:
________________________
Date:
________________________
Comments:
Page 1 of 24
1.
The diagram below shows six pieces of equipment.
(a)
Linda investigates how quickly sugar dissolves in water.
(i)
Which piece of equipment does she use to weigh 5 g of sugar?
Tick the correct box.
A
B
C
D
E
F
1 mark
(ii)
Which piece of equipment does she use to measure out 90 cm3 of water?
Tick the correct box.
A
B
C
D
E
F
1 mark
Page 2 of 24
(b)
Linda heats the water in a beaker.
(i)
Which piece of equipment shown is a beaker?
Tick the correct box.
A
B
C
D
E
F
1 mark
(ii)
Which piece of equipment shown is used to heat water?
Tick the correct box.
A
B
C
D
E
F
1 mark
(c)
Linda adds 5 g of sugar to the hot water.
(i)
She measures the time it takes for the sugar to dissolve.
The equipment used for timing is not shown in the diagram.
What piece of equipment is used to measure the time taken?
......................................................
1 mark
(ii)
The equipment used to measure the temperature of the water is not shown in the
diagram.
What piece of equipment is used to measure temperature?
......................................................
1 mark
maximum 6 marks
2.
Michelle added some universal indicator solution to four liquids.
Michelle uses the pH chart to fill in her table of results.
pH chart
pH
colour
1
2
red
3
4
5
orange
6
7
green
8
9
blue
10
11
12
13
14
purple
Page 3 of 24
(a)
The table below shows some of Michelle’s results.
Complete Michelle’s table of results below.
Use the pH chart to help you.
liquid
milk
colour of universal
indicator solution
green
rain water
hydrochloric acid
pH
5
red
bleach
11
2 marks
(b)
Explain why using acids can be dangerous.
........................................................................................................................
........................................................................................................................
1 mark
(c)
Michelle measured the pH of some milk stored at room temperature for five days.
The graph of Michelle’s results is shown below.
One of the axes has been labelled.
1 mark
(i)
Write the axis label for the graph at X.
(ii)
Use the graph. How does the pH of the milk change over the five days?
...............................................................................................................
1 mark
maximum 5 marks
Page 4 of 24
3.
(a)
The diagrams below show an animal cell and a plant cell.
(i)
The lines from the boxes show the positions of two of the parts that are present in
both cells.
In the boxes, write the names of these two parts.
2 marks
(ii)
Give the names of two parts which are present in plant cells but not in animal cells.
1. ...........................................
2. ...........................................
2 marks
Page 5 of 24
(b)
Organs can carry out their functions because of the special cells they have.
Draw a straight line from the name of each type of cell to the function of the cell and then to
the process it carries out.
One has been done for you.
3 marks
Maximum 7 marks
4.
A long time ago sulphuric acid was made by heating a substance called blue vitriol.
The equations below show how sulphuric acid is produced by this method.
blue vitriol
copper oxide + sulphur trioxide + water
sulphur trioxide + water
(a)
sulphuric acid
Name three elements contained in blue vitriol.
1. ...........................................................
2. ...........................................................
3. ...........................................................
3 marks
Page 6 of 24
(b)
(i)
Anton Lavoisier was a scientist. He made acids by dissolving oxides like sulphur
oxide and nitric oxide in water. They formed two acids; sulphuric acid and nitric acid.
From this, he concluded:
The formulas for these two acids are H2SO4 and HNO3.
How do these formulas support Lavoisier’s conclusion about acids?
.............................................................................................................
.............................................................................................................
1 mark
(ii)
Some time after Lavoisier’s death, hydrochloric acid was identified.
The formula for hydrochloric acid is HCI.
Explain why scientists no longer supported Lavoisier’s conclusion about acids.
.............................................................................................................
.............................................................................................................
1 mark
(c)
Scientists now agree that all acids contain hydrogen.
Look at the two word equations below.
zinc + sulphuric acid
magnesium + nitric acid
(i)
zinc sulphate + hydrogen
magnesium nitrate + hydrogen
Explain how these equations support the suggestion that acids contain hydrogen.
.............................................................................................................
.............................................................................................................
1 mark
(ii)
Complete the equation below for the reaction between iron and hydrochloric acid.
iron + hydrochloric acid
............................ + ............................
1 mark
maximum 7 marks
Page 7 of 24
5.
A teacher mixed iron filings with sulphur on a metal tray.
She heated the mixture in a fume cupboard.
Sulphur is yellow. Iron filings are grey.
The mixture glowed very brightly. The teacher turned off the bunsen burner.
The glow spread through the mixture.
When the mixture cooled, a black solid called iron sulphide was left.
(a)
From this information, give one way you can tell that a chemical reaction took
place.
................................................................................................................
................................................................................................................
1 mark
(b)
What type of substance is each of the chemicals involved in this reaction?
Choose from:
metallic
element
mixture
non-metallic
element
compound
iron ...............................................................
sulphur .........................................................
iron sulphide .................................................
2 marks
Page 8 of 24
(c)
Raj held a magnet near to each of the three chemicals.
By each chemical in the table, write yes or no to show if the chemical was
magnetic.
One has been done for you.
chemical
Was the chemical
magnetic?
sulphur
iron
iron sulphide
no
1 mark
(d)
(i)
When iron is heated with sulphur, iron sulphide is formed.
Give the name of the solid formed when zinc is heated with sulphur.
................................................................................................................
(ii)
Some fossil fuels contain sulphur.
When fuels burn, sulphur reacts with oxygen.
Complete the word equation for this reaction.
sulphur + oxygen → .............................................................................
2 marks
maximum 6 marks
Page 9 of 24
6.
(a)
Methane can be a gas, a liquid or a solid. In the diagram below, arrows P, Q, R and S
represent changes of state.
The boxes on the right show the arrangement of particles of methane in the three different
physical states.
Each circle represents a particle of methane.
(i)
Draw a line from each physical state of methane to the arrangement of particles in
that physical state.
Draw only three lines.
1 mark
(ii)
Arrows P, Q, R and S represent changes of state.
Which arrow represents:
evaporation? ............................................................
melting? ...................................................................
2 marks
(b)
Methane is the main compound in natural gas. The scale below shows the
melting point and the boiling point of methane.
Page 10 of 24
Methane has three physical states: solid, liquid and gas.
(i)
What is the physical state of methane at –170°C?
.............................................................
1 mark
(ii)
The formula of methane is CH4. The symbols for the two elements in methane are C
and H.
Give the names of these two elements.
element C .............................................
element H ............................................
2 marks
(iii)
When methane burns, it reacts with oxygen.
One of the products is water, H2O.
Give the name of the other product.
..............................................................
1 mark
Maximum 7 marks
7.
(a)
The table below shows the melting points and boiling points of four elements.
element
melting point (°C)
boiling point (°C)
aluminium
660
2520
iron
1540
2760
magnesium
650
1100
mercury
−39
357
Page 11 of 24
When answering the questions below, you may give the name of an element
more than once.
Which element in the table is:
(i)
a liquid at 0°C?
...............................................................................................................
1 mark
(ii)
a solid at 1500°C?
...............................................................................................................
1 mark
(iii)
a gas at 500°C?
...............................................................................................................
1 mark
(iv)
a liquid over the biggest temperature range?
...............................................................................................................
1 mark
(b)
The melting point and boiling point of nitrogen are marked on the scale below.
(i)
Draw an arrow on the scale above to show the temperature at which water
freezes.
1 mark
(ii)
When water is a liquid, what is the physical state of nitrogen?
Tick the correct box.
solid
liquid
gas
1 mark
Page 12 of 24
(iii)
What is the physical state of nitrogen at −200°C?
Tick the correct box.
solid
liquid
gas
1 mark
maximum 7 marks
8.
The diagrams represent the arrangement of atoms or molecules in four different
substances, A, B, C and D.
not to scale
Each of the circles,
(a)
(i)
,
and
represents an atom of a different element.
Which substance is a compound?
… … … …
1 mark
(ii)
Which substance is a mixture?
… … … …
1 mark
(iii)
Which two substances are elements?
………… and …………
1 mark
Page 13 of 24
(iv)
Which two substances could be good thermal conductors?
………… and …………
1 mark
(v)
Which substance could be carbon dioxide?
… … … …
1 mark
(b)
The following experiment was set up. Test-tubes containing substances B and C were
placed together as shown. The substances did not react.
They were left for five minutes.
(i)
How many molecules are there in the mixture compared to the total number in
substances B and C?
… … … … … … … … … … … … … … … . … … … … … … … … … … … … … … …
1 mark
(ii)
Complete the diagram which is a model of this experiment.
1 mark
Maximum 7 marks
Page 14 of 24
9.
(a)
Diagram 1 is a simplified drawing of bones and muscles in a left leg viewed from the outer
side.
(i)
Muscle A contracts. What effect does this have on the leg?
.............................................................................................................
.............................................................................................................
1 mark
(ii)
Muscles are found in antagonistic pairs. Write the letters of the pair of muscles which
control the bending and straightening of the leg at the knee.
.............................................................................................................
1 mark
(iii)
When one muscle of an antagonistic pair contracts the other muscle does not relax
completely, but maintains some tension.
What is the advantage of maintaining tension in both muscles.
.............................................................................................................
.............................................................................................................
1 mark
Page 15 of 24
(b)
Diagram 2 shows the elbow joint. Tissue X covers the ends of the bones at the joint.
(i)
Give the name of tissue X. ................................................................
1 mark
(ii)
Osteoarthritis is a very painful condition. In the joints of people with osteoarthritis
small pieces of tissue X break off.
Suggest two effects this could have on the joint.
.............................................................................................................
.............................................................................................................
.............................................................................................................
2 marks
(c)
Tendons are shown in diagram 1 and ligaments are shown in diagram 2. Ligaments can
stretch much more than tendons.
(i)
Explain why ligaments at the elbow need to stretch.
.............................................................................................................
.............................................................................................................
1 mark
(ii)
Explain why it is necessary that tendons hardly stretch at all when a muscle
contracts.
.............................................................................................................
.............................................................................................................
1 mark
Maximum 8 marks
Page 16 of 24
Mark schemes
1.
(a)
(i)
•
E
if more than one box is ticked, award no mark
1 (L3)
(ii)
•
D
if more than one box is ticked, award no mark
1 (L3)
(b)
(i)
•
B
if more than one box is ticked, award no mark
1 (L3)
(ii)
•
F
if more than one box is ticked, award no mark
1 (L3)
(c)
(i)
•
stop watch or stop clock
accept ‘watch’ or ‘clock’
‘timer’ is insufficient
1 (L3)
(ii)
•
thermometer
accept ‘temperature sensor’
‘sensor’ is insufficient
1 (L3)
[6]
2.
(a)
•
7
•
orange
•
an answer in the range 1–3
•
purple
accept ‘1–3’
for all four rows correct, award two marks
for any two or three rows correct, award one mark
answers must be in the correct column and row in the table
2 (L3)
(b)
any one from
•
they are corrosive
•
they burn or irritate
accept ‘they can damage your skin or eyes’
‘‘in case it touches your skin’ is insufficient
it is harmful or poisonous’ is insufficient
‘it can kill you’ is insufficient
‘wear gloves’ is insufficient
do not accept ‘it is flammable’
1 (L4)
Page 17 of 24
(c)
(i)
•
time, in days
accept ‘time’
accept ‘days’
do not accept ‘hours’ or ‘minutes’
1 (L4)
(ii)
it goes down or decreases
accept ‘it becomes acidic’
‘it goes red’ is insufficient
accept ‘it goes from 6.5 to 2.5’
accept ‘the acid gets stronger’
‘it goes sour’ is insufficient
if the label for X is incorrect in part (ci),
do not penalise again in part (cii)
1 (L4)
[5]
3.
(a)
(i)
cell membrane
accept ‘membrane’
1 (L6)
cytoplasm
answers must be in the correct order
1 (L6)
(ii)
any two from
•
cell wall
•
chloroplast
accept ‘chlorophyll’
•
large vacuole
accept ‘vacuole’
2 (L6)
Page 18 of 24
(b)
if more than one line is drawn from any cell or function,
award no mark for those linkages
3 (L6)
[7]
4.
(a)
any three from
•
copper
•
oxygen
•
sulphur
•
hydrogen
accept chemical symbols
‘Cu’
‘O’
‘S’
‘H’
do not accept ‘O 2’ or H2’
3 (L6)
(b)
(i)
•
they both contain oxygen
accept ‘they both have O in them’
do not accept ‘they have O 2 in them’
1 (L6)
Page 19 of 24
(ii)
any one from
•
hydrochloric acid does not contain oxygen
accept ‘it does not contain oxygen’
‘he was wrong’ is insufficient
•
hydrochloric acid is not formed from oxygen
accept ‘not all acids contain oxygen’
accept ‘no oxygen’
1 (L6)
(c)
(i)
any one from
•
they both produce hydrogen (when they react with metals)
•
different metals produce the same gas
accept ‘there is hydrogen left at the end’
‘they contain hydrogen’ is insufficient
‘hydrogen is in the equation’ is insufficient
1 (L6)
(ii)
•
iron chloride
hydrogen
accept ‘FeCl 2’ or ‘FeCl 3’ or ‘Cl 2Fe’
accept ‘H 2’
both answers are required for the mark
answers may be in either order
do not accept ‘iron + chloride’
1 (L6)
[7]
5.
(a)
any one from
•
the mixture glowed
accept ‘the temperature increased’
•
there was a colour change
•
a black solid formed
•
a new substance has been formed
accept ‘a compound or iron sulphide was formed’
accept ‘there is no longer any sulphur or yellow
or iron or grey’
1 (L6)
Page 20 of 24
(b)
•
iron: metallic element
accept ‘metal’
•
sulphur: non-metallic element
accept ‘non-metal’
•
iron sulphide: compound
if all three answers are correct, award two marks
if two answers are correct, award one mark
2 (L5)
(c)
•
sulphur: no
•
iron: yes
both answers are required for the mark
1 (L5)
(d)
(i)
•
zinc sulphide
do not accept ‘zinc sulphate’
1 (L6)
(ii)
•
sulphur dioxide
accept ‘sulphur oxide’ or ‘sulphur trioxide’
1 (L6)
[6]
6.
(a)
(i)
all three lines must be correct for the mark
1 (L6)
(ii)
evaporation: P
1 (L5)
melting: R
1 (L5)
Page 21 of 24
(b)
(i)
liquid
1 (L6)
(ii)
carbon
1 (L6)
hydrogen
1 (L6)
(iii)
carbon dioxide
accept ‘CO 2’
accept ‘carbon monoxide’ or ‘CO’
accept ‘carbon’ or ‘soot’
answers must be in the correct order
1 (L6)
[7]
7.
(a)
(i)
•
mercury
accept ‘Hg’
1 (L5)
(ii)
•
iron
accept ‘Fe’
1 (L5)
(iii)
•
mercury
accept ‘Hg’
1 (L6)
(iv)
•
aluminium
accept ‘Al’
1 (L6)
(b)
(i)
•
an arrow drawn at 0°C
accept any unambiguous indication
1 (L5)
(ii)
•
gas
if more than one box is ticked, award no mark
1 (L6)
(iii)
•
liquid
if more than one box is ticked, award no mark
1 (L6)
[7]
Page 22 of 24
8.
(a)
(i)
C
1 (L7)
(ii)
D
1 (L7)
(iii)
A and B
answers may be in either order
both answers are required for the mark
1 (L7)
(iv)
A and D
answers may be in either order
both answers are required for the mark
1 (L7)
(v)
C
1 (L7)
(b)
(i)
the same
accept ‘seven’
1 (L7)
(ii)
a random, mixed arrangement of both types of molecule should be
drawn with the molecules not touching each other
1 (L7)
[7]
9.
(a)
(i)
it pulls the leg or the femur outwards or to the side
accept ‘it lifts the leg outwards or to the side’
or ‘the leg swings to the side or outwards’
do not accept ‘it lifts the leg’
or ‘it pulls the leg upwards’
1
(ii)
C and F
letters may be in either order
both letters are required for the mark
1
(iii)
any one from
•
it allows controlled or slow movements
accept ‘so that movements are not jerky’
or ‘the relaxed muscle provides resistance to movement’
•
it allows small movements
accept ‘the partially relaxed muscle holds the limb in position’
accept ‘if they relaxed completely the person would fall over’
or ‘it allows more rapid responses’
1
Page 23 of 24
(b)
(i)
cartilage
1
(ii)
any two from
•
ends of bones will rub against each other or become worn
accept ‘there will be friction at the joint’
do not accept ‘the bones will hit each other’
•
less smooth movement in the joint or stiffness in the joint
accept ‘harder to move’
•
inflammation or swelling
do not accept ‘pain’
2
(c)
(i)
to allow the arm to bend or move at the joint
accept ‘to allow the arm to move’
accept ‘so they do not snap when the arm bends’
or ‘they need to be different lengths when the joint moves’
do not accept ‘to allow bones to bend’
1
(ii)
if they stretched they would not pull as much on the bones
accept ‘they would have less effect on bones’
or ‘controlled movement would not be possible’
or ‘they would not pull as much’
do not accept ‘they would not pull on the bone’
or ‘they would not hold bones’
1
[8]
Page 24 of 24