BRIDGEMARK HIGH SCHOOLS
Cambridge Lower Secondary™
Name:..........................................
Science
MOCK EXAMINATIONS
1 hour
Stage 9
Paper 1
No additional materials are needed
INSTRUCTIONS
• Answer all questions.
• Write your answer to each question in the space provided.
• You should show all your working on the question paper.
INFORMATION
• The total mark for this paper is 35.
• The number of marks for each question or part question is shown in brackets [ ].
1
1
Methane has a simple structure.
Look at the model of a molecule of methane.
H
H
C
H
H
key
electron from hydrogen
electron from carbon
(a) How many electrons are in a molecule of methane?
[1]
(b) Write down the type of bonding in a molecule of methane.
Explain your answer.
type of bonding
explanation
[2]
(c) Methane has a simple structure.
Predict one physical property of methane.
[1]
[Turn over
2
2
Jamila spills some liquid on the back of her hand.
After a short time, Jamila’s hand feels cold.
Name the process that makes her hand feel cold.
[1]
3
Look at the diagram of part of the carbon cycle.
carbon dioxide
in the air
A
decomposition
fossil fuels
carbon
compounds
in animals
B
carbon
compounds
in plants
carbon
compounds in
dead animals
and plants
(a) One of the arrows in the diagram shows photosynthesis.
Write the letter P on the arrow that shows photosynthesis.
[1]
(b) Name process A and process B.
process A
process B
[2]
3
4
This question is about different waveforms and sounds.
(a) Look at the diagram of a waveform.
Draw a double-headed arrow (
waveform.
or
) on the diagram to show the amplitude of the
[1]
(b) Aiko hears a high pitch sound and then a low pitch sound.
Write a sentence to compare the frequencies of the two sounds.
[1]
(c) Aiko plays a sound on her phone.
Complete the sentence.
The louder the sound the larger the
.
[1]
5 The table shows the melting points and boiling points of some Group 1 elements.
element
melting point
in °C
boiling point
in °C
lithium
181
1347
sodium
881
potassium
63
766
rubidium
39
688
(a) Describe the trend in the boiling point from the top to the bottom of Group 1.
[1]
(b) Predict the melting point of sodium.
°C [1]
5
6 Yuri investigates current in a parallel electrical circuit.
(a) Draw his circuit with:
• a battery of cells
• a closed switch
• two lamps in parallel with each other
• a meter to measure the current through one of the lamps.
Use standard electrical symbols.
[3]
(b) Yuri uses the same components to make a series electrical circuit with two lamps.
Write a sentence to compare the brightness of the two lamps in the two circuits.
[1]
[Turn over
6
7
Complete the sentences about nebulae.
Nebulae are enormous clouds of
Some nebulae act as stellar nurseries for new
and
.
.
[3]
7
8
Look at the diagram of two waveforms.
Tick () the box which shows what happens when these two waveforms interact.
[1]
8
9
This question is about the impact of climate change.
Write down two impacts of climate change.
1
2
[2]
[Turn over
9
10 This question is about floating and sinking.
(a) Look at the table of densities for different materials.
material
density
in kg / m3
concrete
2400
iron
7000
plastic
920
water
1000
wood
600
Which materials from the table float in water?
Explain your answer.
materials
explanation
[2]
(b) An object sinks in water but floats in sea water.
Predict a value for the density of sea water.
Circle the correct answer.
100 kg / m3
900 kg / m3
1000 kg / m3
1030 kg / m3
[1]
10
(c) An object is put into a container full of water.
The object floats and a volume of water comes out of the container.
The water is collected in a 100 cm3 measuring cylinder.
Look at the diagram of part of the measuring cylinder.
cm3
50
40
30
What volume of water is collected?
cm3
[1]
[Turn over
11
11 Luka investigates the properties of four different metals.
For
Teacher's
Use
(a) His first investigation is about heat conduction.
Luka heats the end of each metal rod.
Some of the wax will heat up, melt and drip off the rod.
wax coating the metal rod
metal rod
heat
After five minutes, he stops heating the metal rod.
Here is the result.
metal rod
/
wax coating the metal rod
heat
(i) Luka heats each metal rod for the same amount of time.
Suggest two other things he should keep the same to make it a fair test.
1
2
[2]
(ii) He wants to compare how well the four metals conduct heat.
Suggest a measurement he could take and the apparatus he could use.
Measurement
Apparatus
[1]
12
(iii) Luka records his results. Draw a results table for him to use.
For
Teacher's
Use
(b) Luka’s second investigation is about the conduction of electricity.
Here are his results.
electrical
conductivity
Which metal would be the best to use for electrical wires?
[1]
(ii) Suggest one other property of metals that is important when making
electrical wires.
[1]
[Turn over
PREPARED BY Mr CHIBBELA
21
calcium
40
38
Sr
strontium
88
56
Ba
barium
137
88
potassium
39
37
Rb
rubidium
85
55
Cs
caesium
133
87
actinoids
lanthanoids
–
Ca
K
–
actinoids
20
19
Ra
24
23
radium
89–103
magnesium
sodium
Fr
57–71
Mg
Na
francium
89
12
11
22
cerium
140
90
Th
thorium
232
lanthanum
139
89
Ac
actinium
–
231
protactinium
Pa
91
141
praseodymium
Pr
59
58
Ce
57
–
–
dubnium
Db
105
181
tantalum
Ta
73
93
niobium
238
uranium
U
92
144
neodymium
Nd
60
–
seaborgium
Sg
106
184
tungsten
W
74
96
molybdenum
Mo
42
41
Nb
52
chromium
Cr
24
51
vanadium
V
23
relative atomic mass
rutherfordium
Rf
104
178
hafnium
Hf
72
91
zirconium
Zr
40
48
titanium
Ti
La
lanthanoids
yttrium
Y
39
45
scandium
Sc
9
7
name
atomic symbol
Be
beryllium
Li
lithium
atomic number
4
3
Key
2
1
–
neptunium
Np
93
–
promethium
Pm
61
–
bohrium
Bh
107
186
rhenium
Re
75
–
technetium
Tc
43
55
manganese
Mn
25
27
–
plutonium
Pu
94
150
samarium
Sm
62
–
hassium
Hs
108
190
osmium
Os
76
101
ruthenium
28
–
americium
Am
95
152
europium
Eu
63
–
meitnerium
Mt
109
192
–
curium
Cm
96
157
gadolinium
Gd
64
–
darmstadtium
Ds
110
195
platinum
Pt
Ir
iridium
78
106
palladium
Pd
46
59
nickel
Ni
77
103
rhodium
Rh
45
44
Ru
59
cobalt
Co
56
iron
Fe
26
29
30
–
berkelium
Bk
97
159
terbium
Tb
65
–
roentgenium
Rg
111
197
gold
Au
79
108
silver
Ag
47
64
copper
Cu
–
californium
Cf
98
163
dysprosium
Dy
66
–
copernicium
Cn
112
201
mercury
Hg
80
112
cadmium
Cd
48
65
zinc
Zn
B
C
–
einsteinium
Es
99
165
holmium
Ho
67
–
nihonium
Nh
113
204
thallium
Tl
81
115
–
fermium
Fm
100
167
erbium
Er
68
–
flerovium
Fl
114
207
lead
Pb
82
119
tin
Sn
In
indium
50
73
germanium
Ge
32
–
mendelevium
Md
101
169
thulium
Tm
69
–
moscovium
Mc
115
209
bismuth
Bi
83
122
antimony
Sb
51
75
arsenic
As
33
31
phosphorus
silicon
28
P
15
14
nitrogen
N
7
Si
14
12
carbon
49
70
gallium
Ga
31
27
aluminium
Al
13
11
boron
6
–
nobelium
No
102
173
ytterbium
Yb
70
–
livermorium
Lv
116
–
polonium
Po
84
128
tellurium
Te
52
79
selenium
Se
34
32
sulfur
S
16
16
oxygen
O
8
–
lawrencium
Lr
103
175
lutetium
Lu
71
–
tennessine
Ts
117
–
astatine
At
85
127
iodine
I
53
80
bromine
Br
35
35.5
chlorine
Cl
17
19
fluorine
F
9
–
oganesson
Og
118
–
radon
Rn
86
131
xenon
Xe
54
84
krypton
Kr
36
40
argon
Ar
18
20
neon
Ne
10
4
5
helium
8
1
7
hydrogen
6
2
5
He
4
H
3
1
Group
The Periodic Table of Elements
13