CAMBRIDGE LOWER SECONDARY SCIENCE 9:MID-POINT TEST: UNITS 3 AND 6
Name ___________________________________ Date _____________
Disclaimer: This test and mark scheme have been written by the authors.
Mid-point test: Units 3 and 6
1 a State the law of conservation of energy. [2]
Energy cannot be created or destroyed; it can only be transferred or transformed from one form to
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another
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b Thermal energy spreads out from hot objects.
Which term describes the process of energy spreading out and becoming less useful? [1]
Tick (✓) one box.
evaporation
dissipation
conservation
condensation
2 Conduction is one method of transferring thermal energy.
a Name the other two methods. [2]
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Convection and radiation
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b i Name one method of thermal energy transfer that cannot occur in a vacuum. [1]
Convection
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ii Explain your choice. [2]
Convection requires air or liquid to transfer heat through the movement of particles.
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In a vacuum, there are no particles to transfer heat by convection
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Cambridge Lower Secondary Science 9 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021 1
CAMBRIDGE LOWER SECONDARY SCIENCE 9:MID-POINT TEST: UNITS 3 AND 6
3 The diagrams show the waveforms of four sounds, A–D.
a Which sound is the loudest? [1]
Write the letter: _______________
A
b Which sound has the lowest pitch? [1]
C
Write the letter: _______________
4 There are different theories about how the Moon was formed.
Name the theory that is currently accepted by most scientists. [1]
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The Giant Impact Hypothesis
5 a List these objects in the correct order of size, from smallest to largest. [1]
star planet nebula
Planet
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Star
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Nebula
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b There are different types of nebula.
Some of them appear bright and contain areas of greater brightness. This type of nebula emits
its own light.
Suggest why this type of nebula is thought to contain stellar nurseries. [3]
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A bright nebula emits its own light, which suggests the presence of new stars forming within it.
Other nebulae are regions where new stars are beginning to form.
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Cambridge Lower Secondary Science 9 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021 2
