Centre Number
Candidate
Number
Candidate Name
CAMBRIDGE INTERNATIONAL EXAMINATIONS
General Certificate of Education Ordinary Level
5129/2
COMBINED SCIENCE
PAPER 2
MAY/JUNE SESSION 2002
2 hours 15 minutes
Candidates answer on the question paper.
No additional materials are required.
TIME
2 hours 15 minutes
INSTRUCTIONS TO CANDIDATES
Write your name, Centre number and candidate number in the spaces at the top of this page.
Answer all questions.
Write your answers in the spaces provided on the question paper.
INFORMATION FOR CANDIDATES
The number of marks is given in brackets [ ] at the end of each question or part question.
A copy of the Periodic Table is printed on page 20.
FOR EXAMINER’S USE
TOTAL
This question paper consists of 19 printed pages and 1 blank page.
SP (CW/JB) S25732/3
© CIE 2002
http://www.xtremepapers.net
[Turn over
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Examiner’s
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2
1
A boy runs at 6.0 m / s and his dog runs at 10.0 m / s.
(a) Calculate the distance travelled in 15.0 s by
(i)
the boy,
............................[1]
(ii)
the dog.
............................[1]
(b) The boy races his dog, as shown in Fig. 1.1.
10.0 m/s
0m
6.0 m/s
40 m
Fig. 1.1
The boy starts 40 m ahead of the dog. They start running at the same time.
Fig. 1.2 shows a distance – time graph for the dog and the boy.
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distance from start / m
3
140
120
100
80
boy
60
40
dog
20
0
0
2
4
6
8
10
12
time / s
14
Fig. 1.2
(i)
How can you tell from Fig. 1.2 that the dog is moving faster than the boy?
...................................................................................................................................
...............................................................................................................................[1]
(ii)
How far has the dog run when it catches up with the boy?
...................................................................................................................................
...............................................................................................................................[1]
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4
2
31 P.
The most common isotope of phosphorus has the symbol 15
(a) How many protons and neutrons are there in one atom of this isotope?
number of protons ......................................
number of neutrons ....................................
[2]
(b) What is the difference between this isotope and the other isotopes of phosphorus?
..........................................................................................................................................
......................................................................................................................................[1]
31 P.
(c) Complete Fig. 2.1 to show the electronic structure of 15
[2]
P
Fig. 2.1
(d) Name another element that has the same number of outer shell electrons as
phosphorus.
......................................................................................................................................[1]
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5
3
Fig. 3.1 shows side views of two human teeth.
A
B
Fig. 3.1
(a) Suggest a different use for each type of tooth.
A .......................................................................................................................................
..........................................................................................................................................
B .......................................................................................................................................
......................................................................................................................................[2]
(b) Explain the part played by teeth in digestion.
..........................................................................................................................................
......................................................................................................................................[1]
(c) (i)
State three causes of dental decay.
1. ...............................................................................................................................
2. ...............................................................................................................................
3. ...........................................................................................................................[3]
(ii)
State two ways in which dental decay can be reduced other than by cleaning the
teeth.
1. ...............................................................................................................................
2. ...........................................................................................................................[2]
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6
4
Fig. 4.1 shows some elements in the reactivity series.
element
K
Na
Ca
Al
C
Fe
H
Cu
decreasing reactivity →
Fig. 4.1
(a) Use Fig. 4.1 to explain fully
(i)
why water pipes made of copper last longer than those made of iron,
...................................................................................................................................
...............................................................................................................................[2]
(ii)
why iron is extracted by heating its ore with carbon but aluminium is not.
...................................................................................................................................
...............................................................................................................................[2]
(b) Name one non-metal, other than carbon, shown in Fig. 4.1.
......................................................................................................................................[1]
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7
5
(a) Waves are either transverse or longitudinal.
(i)
Explain the difference between a transverse wave and a longitudinal wave.
...................................................................................................................................
...................................................................................................................................
...................................................................................................................................
...............................................................................................................................[3]
(ii)
Give one example of a longitudinal wave. ............................................................[1]
(b) Ripples on the surface of a pond have a frequency of 10 Hz. One ripple travels 80 cm in
a time of 5.0 s.
(i)
What is meant by frequency?
...................................................................................................................................
...............................................................................................................................[1]
(ii)
Calculate
1. the speed of the ripples,
............................[2]
2. the wavelength of the ripples.
............................[2]
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8
6
Study the reaction scheme in Fig. 6.1.
ethene
yellow solution A
burns in
oxygen
colourless
gas B
solution A becomes
colourless
steam + catalyst
+
colourless
liquid C
colourless
liquid D
Fig. 6.1
(a) Identify the substances A, B, C and D.
yellow solution A ........................................
colourless gas B ........................................
colourless liquid C ......................................
colourless liquid D ......................................
[4]
(b) Ethene is an unsaturated hydrocarbon.
Explain the terms unsaturated and hydrocarbon.
unsaturated ......................................................................................................................
..........................................................................................................................................
hydrocarbon .....................................................................................................................
......................................................................................................................................[2]
(c) Name the type of reaction that occurs between ethene and yellow solution A.
......................................................................................................................................[1]
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9
7
Fig. 7.1 shows a section through an eye.
A
B
C
D
Fig. 7.1
(a) Name the parts labelled A to D.
A .......................................................................................................................................
B .......................................................................................................................................
C .......................................................................................................................................
D ...................................................................................................................................[4]
(b) Name the part of the eye that changes light energy to nerve impulses.
......................................................................................................................................[1]
(c) State and explain how the ciliary muscles help to produce a focused image when
looking at a near object.
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
......................................................................................................................................[3]
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10
(d) (i)
State how the muscles of the part labelled D respond when you enter bright light.
...................................................................................................................................
...............................................................................................................................[1]
(ii)
State how this affects part A.
...................................................................................................................................
...............................................................................................................................[1]
(iii)
Explain how this is an advantage.
...................................................................................................................................
...................................................................................................................................
...............................................................................................................................[1]
8
A stone on Earth has a mass of 80 g. On Earth, the acceleration due to gravity g = 10 N / kg.
(a) Explain the difference between mass and weight.
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
......................................................................................................................................[2]
(b) Calculate
(i)
the mass of the stone in kg,
............................[1]
(ii)
the weight of the stone on Earth.
............................[1]
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For
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11
9
An excess of dilute sulphuric acid is added to 6.2 g of copper(II) carbonate.
The equation for the reaction is
CuCO3 + H2SO4 → CuSO4 + H2O + CO2
(a) (i)
How do you know when the reaction is complete?
...................................................................................................................................
...............................................................................................................................[1]
(ii)
How can you show that carbon dioxide is given off during the reaction?
...................................................................................................................................
...............................................................................................................................[2]
(b) (i)
Calculate the relative molecular mass, Mr, of copper(II) carbonate.
(Ar: Cu, 64; C, 12; O, 16.)
...................................................................................................................................
...............................................................................................................................[1]
(ii)
Calculate the relative molecular mass, Mr, of carbon dioxide.
...............................................................................................................................[1]
(iii)
Use your answers to (b)(i) and (b)(ii) to calculate the mass of carbon dioxide
produced from 6.2 g of copper(II) carbonate.
...................................................................................................................................
...................................................................................................................................
...............................................................................................................................[2]
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12
10 Fig. 10.1 shows a refrigerator that has the freezer compartment at the top. Heat is removed
from the freezer compartment. This makes it the coldest part of the refrigerator.
freezer
compartment
wall of
refrigerator
white surface
Fig. 10.1
(a) Explain fully how the rest of the refrigerator is cooled by convection currents.
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
......................................................................................................................................[3]
(b) Explain why the white surface helps to keep the refrigerator cool.
..........................................................................................................................................
..........................................................................................................................................
......................................................................................................................................[2]
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For
Examiner’s
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13
11 (a) Gonorrhoea and AIDS are sexually transmitted diseases.
What is meant by a sexually transmitted disease?
......................................................................................................................................[1]
(b) (i)
State two signs of gonorrhoea in a male.
1. ...............................................................................................................................
2. ...........................................................................................................................[2]
(ii)
How is gonorrhoea treated?
...................................................................................................................................
...............................................................................................................................[1]
(c) Explain why AIDS is much more dangerous than gonorrhoea.
..........................................................................................................................................
..........................................................................................................................................
......................................................................................................................................[2]
(d) State a way, other than that in (a), by which AIDS may be transmitted.
..........................................................................................................................................
......................................................................................................................................[1]
5129/2/M/J/02
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14
12 Fig. 12.1 shows burning sodium being lowered into a gas jar of carbon dioxide.
burning
sodium
carbon
dioxide
Fig. 12.1
The sodium burns to give a white solid and a black solid.
(a) Suggest the identity of the
white solid, .................................................
black solid. .................................................
[2]
(b) What type of reaction does the sodium undergo?
......................................................................................................................................[1]
(c) When water is added to the products of the reaction, the white solid dissolves but the
black solid does not dissolve.
(i)
Suggest the type of bonding present in the white solid.
...............................................................................................................................[1]
(ii)
What process can be used to separate the black solid from the solution?
...............................................................................................................................[1]
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15
13 Liquid-in-glass thermometers may contain alcohol or mercury. Fig. 13.1 gives information
about these liquids.
liquid
melting point/°C
boiling point/°C
alcohol
–117
78.5
mercury
–39
365
For
Examiner’s
Use
Fig. 13.1
(a) A liquid-in-glass thermometer is used to measure a temperature of – 42 °C.
Which liquid is used in this thermometer? Give a reason for your choice.
..........................................................................................................................................
......................................................................................................................................[1]
(b) Fig. 13.2 shows the structure of a liquid-in-glass thermometer.
thin glass bulb
narrow capillary tube
liquid
Fig. 13.2
(i)
State why the glass wall of the bulb is thin.
...................................................................................................................................
...............................................................................................................................[1]
(ii)
State why the capillary tube is narrow.
...................................................................................................................................
...............................................................................................................................[1]
(c) A thermometer must have a scale.
Explain why a mercury-in-glass thermometer is placed in melting ice and then placed in
boiling water.
..........................................................................................................................................
..........................................................................................................................................
......................................................................................................................................[2]
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16
14 (a) State three conditions that are required for seeds to germinate.
1. ......................................................................................................................................
2. ......................................................................................................................................
3. ..................................................................................................................................[3]
(b) In an experiment to investigate the growth of pea seeds, two seed trays were prepared.
In tray 1, 10 seeds were planted in sand.
In tray 2, 10 seeds were planted in soil.
Both trays were watered regularly and kept under the same conditions for six weeks.
(i)
Explain why the pea seeds in both trays grew equally well for the first two weeks.
...................................................................................................................................
...............................................................................................................................[1]
(ii)
After six weeks, the seedlings growing in tray 2 were bigger than those in tray 1.
Explain why the soil in tray 2 was more fertile than the sand in tray 1.
...................................................................................................................................
...............................................................................................................................[1]
(iii)
Suggest one way in which the seedlings in the sand could be made to grow better.
...................................................................................................................................
...............................................................................................................................[1]
(c) Explain the importance of nitrogen-containing ions to the growing plants.
..........................................................................................................................................
......................................................................................................................................[1]
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17
15 In Fig. 15.1, the boxes on the left give the names of some elements and the boxes on the
right show some uses of elements.
For
Examiner’s
Use
Draw a line between the boxes to link each element to its correct use. One of the lines has
been drawn for you.
oxygen
galvanising
aluminium
electrical wiring
copper
making steel
zinc
aircraft bodies
hydrogen
making margarine
[4]
Fig. 15.1
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18
16 Fig. 16.1 shows a battery of e.m.f. 6.0 V in series with two resistors. One of these resistors
has a fixed resistance of 4.0 Ω.
(a) On Fig. 16.1, draw the symbol for a voltmeter, connected to measure the potential
difference across the fixed resistor.
[2]
6.0V
fixed resistor
variable resistor
4.0 Ω
0
8.0 Ω
Fig. 16.1
(b) The variable resistor is adjusted until the voltmeter across the fixed resistor reads 4.0 V.
Calculate the potential difference across the variable resistor.
............................[1]
(c) The variable resistor can be changed from zero to 8.0 Ω. It is adjusted to give the
smallest current in the circuit.
Calculate the value of this current.
............................[3]
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19
BLANK PAGE
5129/2/M/J/02
Magnesium
Sodium
5129/2/M/J/02
Strontium
Rubidium
89
Key
b
X
a
†
72
b = proton (atomic) number
X = atomic symbol
a = relative atomic mass
*58-71 Lanthanoid series
†90-103 Actinoid series
88
Ac
Actinium
Ra
Radium
Fr
Francium
87
*
Hafnium
Lanthanum
57
178
Hf
40
Zirconium
Zr
91
Titanium
139
Yttrium
22
48
Ti
La
39
Y
89
Scandium
21
227
56
Barium
Caesium
45
Sc
226
55
137
Ba
133
Cs
38
Sr
Rb
37
88
Calcium
85
19
20
40
Ca
39
K
12
24
Mg
23
Na
Beryllium
4
Lithium
Potassium
11
3
9
Be
7
II
Li
I
51
Ta
181
Niobium
Nb
93
90
58
73
52
Mo
96
W
184
Protactinium
Thorium
55
Tc
186
Re
144
Nd
92
60
Uranium
U
238
Neodymium
75
Rhenium
43
Technetium
25
Manganese
Mn
27
59
28
59
29
64
30
65
5
Ru
101
Iron
190
Pm
Osmium
Os
Np
93
Neptunium
61
Promethium
76
44
Ruthenium
26
56
Fe
Sm
150
Iridium
Pu
94
Plutonium
62
152
Eu
Am
95
Americium
63
Europium
78
Platinum
195
Pt
Ir
46
Palladium
Pd
106
Nickel
Ni
192
Samarium
77
45
Rhodium
Rh
103
Cobalt
Co
Gd
157
Gold
Au
197
Silver
96
64
Curium
Cm
Gadolinium
79
47
Ag
108
Copper
Cu
201
Bk
Terbium
Tb
159
Mercury
Hg
97
Berkelium
65
80
48
Cadmium
Cd
112
Zinc
Zn
11
6
Dy
162
Thallium
Tl
204
Cf
98
Californium
66
Es
Holmium
Ho
165
Lead
Pb
207
Tin
99
Einsteinium
67
82
50
Sn
In
Indium
119
32
Germanium
Ge
73
Silicon
115
Gallium
Dysprosium
81
49
31
70
Ga
14
28
Si
Carbon
27
Aluminium
13
12
C
Al
Boron
B
7
14
75
Sb
122
Arsenic
As
Bi
209
Fermium
Fm
Erbium
Er
167
Bismuth
100
68
83
51
Antimony
33
15
Phosphorus
P
31
Nitrogen
N
8
Se
79
Sulphur
S
32
Oxygen
Po
169
Md
Thulium
Tm
101
Mendelevium
69
84
Polonium
52
Tellurium
Te
128
Selenium
34
16
16
O
9
Yb
173
Astatine
At
Iodine
I
127
Bromine
Br
80
Chlorine
No
102
Nobelium
70
Ytterbium
85
53
35
17
Cl
35.5
Fluorine
F
19
Lr
Lutetium
Lu
175
Radon
Rn
Xenon
Xe
131
Krypton
Kr
84
Argon
Ar
40
Neon
103
Lawrencium
71
86
54
36
18
10
Ne
20
Helium
2
0
Hydrogen
VII
4
VI
He
V
1
IV
H
III
The volume of one mole of any gas is 24 dm3 at room temperature and pressure (r.t.p.).
91
Pa
Th
232
Praseodymium
Cerium
59
141
Pr
140
74
Tungsten
42
Molybdenum
24
Chromium
Cr
Ce
Tantalum
41
23
Vanadium
V
1
Group
DATA SHEET
The Periodic Table of the Elements
20