CAMBRIDGE LOWER SECONDARY SCIENCE 8: END-OF-UNIT TEST
Name ___________________________________
Soham
Date _____________
Disclaimer: This test and mark scheme have been written by the authors.
End-of-unit test
Unit 3
1
Complete the equation for speed. Use the words distance and time.
[1]
distance
time
speed = _______________
2
This is a distance/time graph for a train journey between two stations, A and B.
Use the graph to answer these questions.
a
State the distance between station A and station B.
[1]
_______________
50 km
b State the time taken to travel between station A and station B.
[1]
_______________
1 h
3
Which of these require unbalanced forces? Tick (✓) two boxes.
[1]
A car getting slower in a straight line.
A bicycle moving at constant speed in a straight line.
A computer sitting on a desk and not moving.
A train travelling around a circular track at constant speed.
Cambridge Lower Secondary Science 8 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021
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CAMBRIDGE LOWER SECONDARY SCIENCE 8: END-OF-UNIT TEST
4
The diagram shows a force of 15 N pulling to open a door.
The distance from the hinge (pivot) to the door handle is 0.8 m.
The diagram is drawn from above.
Calculate the moment caused by the 15 N force on the door.
Show your working.
[2]
0.8 x 15 = 8 x 15 ÷ 10 = 120 ÷ 10
= 12
12
__________
Nm
5
a
Complete the equation for pressure. Use the words force and area.
[1]
force
area
pressure = _______________
b Sofia pumps air into the tyre of a bicycle. The pressure of the air in the tyre is
higher than the pressure of the air outside the tyre.
Explain what causes the pressure of the air inside the tyre.
[2]
_______________________________________________________________________________
As Sofia pumps air into the tyre of a bicycle, the pressure will increase, because the
particles will keep colliding with the inside of the tyre, this causes the pressure of air inside
_______________________________________________________________________________
the tyre.
_______________________________________________________________________________
6
Marcus heats soup in a saucepan. Explain why the smell of the soup spreads faster
as the soup becomes hotter.
[1]
__________________________________________________________________________________
It is because the more the temperature, the smell of the food, because as it is heated, some
particles of the food change state and become gas.
__________________________________________________________________________________
Cambridge Lower Secondary Science 8 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021
6
CAMBRIDGE LOWER SECONDARY SCIENCE 8: END-OF-UNIT TEST
Name ___________________________________
Date _____________
Disclaimer: This test and mark scheme have been written by the authors.
End-of-unit test
Unit 4
1
The diagram shows a food web in an Asian country.
a
Name the producer in this food web.
[1]
_______________________________________________________________________________
Rice
Cambridge Lower Secondary Science 8 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021
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CAMBRIDGE LOWER SECONDARY SCIENCE 8: END-OF-UNIT TEST
b The food web was investigated at two sites that were close to each other.
At site A, mercury is used to extract metals at a nearby mine. There is no mine near site B.
The table shows the concentrations of mercury in some of the organisms in the food webs
at each site.
organism
concentration of mercury in organism in parts per million
site A
site B
rice
0.2
0.0
insect
1.8
0.1
frog
6.0
0.3
snake
10.0
2.0
Describe how the concentrations of mercury in the organisms at site B are different from the
concentrations at site A.
[2]
_______________________________________________________________________________
It is because the mercury can change state into gas, and can turn to water vapour,
which affects the organism's health.
_______________________________________________________________________________
c
Look at the results for Site A.
Explain why the concentration of mercury in a snake is greater than the concentration
of mercury in an insect.
[2]
_______________________________________________________________________________
The concentration of mercury in a snake is greater than the concentration of mercury in
insect because as the more higher the food chain goes, the concentration of the mercury
_______________________________________________________________________________
increases.
_______________________________________________________________________________
_______________________________________________________________________________
2
Which biological terms are described?
a
The interactions between all the organisms and their environment.
[1]
_______________________________________________________________________________
Ecosystem
b A place where an organism lives.
[1]
_______________________________________________________________________________
Habitat
Cambridge Lower Secondary Science 8 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021
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CAMBRIDGE LOWER SECONDARY SCIENCE 8: END-OF-UNIT TEST
3
a
Which two sentences describe reasons why invasive species can reduce the numbers
of a native species?
Tick (✓) two boxes.
They compete with the native species for food.
They can be eaten by the native species.
They can be a predator of the native species.
They provide new habitats for the native species.
They help to pollinate the native species.
[2]
b Explain why introduced species often cause harm in their new environment, but do not cause
harm in their native country.
[1]
It_______________________________________________________________________________
is because introduced species can become predators for the native species of their new
environment,
and can reduce the number of native species in the new environment.
_______________________________________________________________________________
Cambridge Lower Secondary Science 8 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021
9
CAMBRIDGE LOWER SECONDARY SCIENCE 8: END-OF-UNIT TEST
Name ___________________________________
Date _____________
Disclaimer: This test and mark scheme have been written by the authors.
End-of-unit test
Unit 5
1
Write true or false next to each of these statements about atoms.
a
[4]
true
Protons have a positive electric charge. ________________
b Electrons have a positive electric charge. ________________
false
c
Neutrons have a negative electric charge. ________________
false
d Electrons have a larger mass than protons and neutrons. ________________
false
2
Explain the difference between weather and climate.
[2]
__________________________________________________________________________________
Weather is the prediction of the condition of a place, over a short period of time, day to day, hour to hour, etc.
__________________________________________________________________________________
Climate is the condition of a place for a long time, usually more that 50 years.
3
Which of the following energy resources are renewable?
[2]
Tick (✓) two boxes.
petroleum
wind
coal
solar
4
Billions of years ago, the climate and the atmosphere on Earth were not able to support life.
State at least two ways in which the early atmosphere of Earth was different from that of today.
[2]
--> __________________________________________________________________________________
The early atmosphere was mostly made up of carbon dioxide and little to no oxygen, this shows that life
__________________________________________________________________________________
could
not hav been supported.
--> __________________________________________________________________________________
Life can be supported now due to most of the earth having nitrogen, 21% oxygen and little carbon dioxide.
Cambridge Lower Secondary Science 8 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021
10
CAMBRIDGE LOWER SECONDARY SCIENCE 8: END-OF-UNIT TEST
Name ___________________________________
Date _____________
Disclaimer: This test and mark scheme have been written by the authors.
End-of-unit test
Unit 6
1
a
State the law of reflection.
[1]
_______________________________________________________________________________
_______________________________________________________________________________
b The diagram shows a plane mirror and a normal line.
Draw a ray of light being reflected at the point where the normal meets the mirror.
Cambridge Lower Secondary Science 8 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021
[2]
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CAMBRIDGE LOWER SECONDARY SCIENCE 8: END-OF-UNIT TEST
2
a
State what happens to the speed of light when light passes from air into glass.
[1]
_______________________________________________________________________________
the speed decreases
b The diagram shows the surface of a glass block and a normal line.
Draw a ray of light passing from air into the glass at the point where the normal meets the surface. [2]
3
White light is made from many colours.
Use the best words to complete these sentences about light.
a
[2]
White light can be split into many colours by passing the white light through a ______________.
prism
b Splitting white light into many colours is called __________________.
dispersion
4
State the colour of light produced when red and green light of equal brightness are added.
[1]
__________________________________________________________________________________
brown
5
Which of these explains where asteroids came from?
[1]
Tick (✓) one box.
They were formed when a planet in the Solar System broke apart.
They were formed when another star in the Solar System broke apart.
They were formed from rocks left over from the formation of the Solar System.
They arrived from space after the formation of the Solar System.
Cambridge Lower Secondary Science 8 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021
12
CAMBRIDGE LOWER SECONDARY SCIENCE 8: END-OF-UNIT TEST
Name ___________________________________
Date _____________
Disclaimer: This test and mark scheme have been written by the authors.
End-of-unit test
Unit 7
1
a
A balanced diet should include the correct amount of energy each day.
What else should be included in a balanced diet?
[1]
_______________________________________________________________________________
_______________________________________________________________________________
_______________________________________________________________________________
_______________________________________________________________________________
Marcus wanted to know if cashew nuts contain more energy than pecan nuts.
•
•
•
•
•
He measured 20 cm3 of water into a test tube.
He measured the temperature of the water.
He held a cashew nut in a flame until it started to burn.
He held the burning nut under the test tube that contained the water.
When the nut finished burning, he measured the temperature of the water again.
Cambridge Lower Secondary Science 8 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021
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CAMBRIDGE LOWER SECONDARY SCIENCE 8: END-OF-UNIT TEST
b What apparatus should Marcus use to measure 20 cm3 of water?
[1]
_______________________________________________________________________________
c
Marcus repeats the experiment using a pecan nut.
How can Marcus use his results to decide which kind of nut contains more energy?
[1]
_______________________________________________________________________________
_______________________________________________________________________________
2
The food that we eat affects our health.
a
Explain why fats and oils should be included in a balanced diet.
[1]
_______________________________________________________________________________
_______________________________________________________________________________
_______________________________________________________________________________
b Explain why eating too many fatty foods can harm a person’s health.
[2]
_______________________________________________________________________________
_______________________________________________________________________________
_______________________________________________________________________________
Cambridge Lower Secondary Science 8 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021
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CAMBRIDGE LOWER SECONDARY SCIENCE 8: END-OF-UNIT TEST
3
The diagram shows a ball-and-socket joint.
The joint is between the bone at the top of the leg, and the hip bone.
a
What kind of movement can happen at a ball-and-socket joint?
[1]
_______________________________________________________________________________
_______________________________________________________________________________
b Name one other place in the human body where there is a ball-and-socket joint.
[1]
_______________________________________________________________________________
c
The skeleton also has hinge joints.
A pair of antagonistic muscles moves the bones at a hinge joint.
Explain why a pair of muscles is needed to move the bones.
[2]
_______________________________________________________________________________
_______________________________________________________________________________
_______________________________________________________________________________
Cambridge Lower Secondary Science 8 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021
15
CAMBRIDGE LOWER SECONDARY SCIENCE 8: END-OF-UNIT TEST
Name ___________________________________
Date _____________
Disclaimer: This test and mark scheme have been written by the authors.
End-of-unit test
Unit 8
1
Match each word with one meaning.
[3]
a reaction that gives out thermal
energy
inert
very reactive
pure
a reaction that absorbs thermal
energy
exothermic
unreactive
made of only one substance
2
When magnesium metal reacts with dilute sulfuric acid, lots of bubbles of gas are produced.
a
Name the gas given off.
[1]
Hydrogen
_______________________________________________________________________________
b Name a metal that does not react with dilute acid.
[1]
_______________________________________________________________________________
c
Name a metal that is so reactive with acid that it would be unsafe to carry out the reaction
in a school laboratory.
[1]
Calcium
_______________________________________________________________________________
Cambridge Lower Secondary Science 8 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021
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CAMBRIDGE LOWER SECONDARY SCIENCE 8: END-OF-UNIT TEST
3
Complete the following word equations.
a
4
magnesium + oxygen  ______________________________________________
magnesium oxide
[1]
potassium
b ______________________________________________
+ water  potassium hydroxide
[1]
Why is sodium metal stored under oil?
[1]
__________________________________________________________________________________
It is because sodium metal is reactive with oxygen
5
What chemical reaction is used in self-heating food cans?
[1]
__________________________________________________________________________________
calcium oxide + water
Cambridge Lower Secondary Science 8 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021
17
CAMBRIDGE LOWER SECONDARY SCIENCE 8: END-OF-UNIT TEST
Name ___________________________________
Date _____________
Disclaimer: This test and mark scheme have been written by the authors.
End-of-unit test
Unit 9
1
a
Draw the magnetic field pattern around this magnet.
[1]
b Complete the sentences using words from the list.
[2]
Each word can be used once, more than once, or not at all.
attract
force
repel
pull
A magnetic field will exert a _______________
on another magnetic field.
pull
The magnetic field around a north pole will _______________
the magnetic field around
repel
another north pole.
2
A magnetic compass can be used to navigate around the Earth.
Complete these sentences to explain why.
The Earth is surrounded by a _______________
field.
magnetic
This field is caused by the _______________
of the Earth acting like a magnet.
inner core
Cambridge Lower Secondary Science 8 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021
[2]
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CAMBRIDGE LOWER SECONDARY SCIENCE 8: END-OF-UNIT TEST
3
This diagram shows an electromagnet.
iron rod
coiled wire
battery
Complete the diagram by adding labels.
4
[2]
Sofia investigates how the current in an electromagnet affects the strength of the electromagnet.
a
State two variables that Sofia must keep constant during this investigation.
[1]
number of coils around the iron rod
1. _____________________________________________________________________________
2. _____________________________________________________________________________
type of rod used to make a electromagnet
b Sofia measures the number of paperclips that can be lifted by the electromagnet
each time the current is changed.
This table shows her results.
i
ii
current in A
number of
paperclips
0.1
5
0.2
11
0.3
16
0.4
19
0.5
24
0.6
28
Plot the results from the table as points on the graph.
The first three points have been plotted for you.
[1]
Complete the graph by drawing a straight line of best fit.
[1]
Cambridge Lower Secondary Science 8 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021
19