CAMBRIDGE LOWER SECONDARY SCIENCE 9: 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 Sound travels as sound waves.
Complete these sentences using the best words. [1]
As the loudness of a sound increases, the _______________ of the sound wave increases.
As the pitch of a sound increases, the _______________ of the sound wave increases.
2 The diagrams show the waveforms of four sounds, A–D, as displayed on an oscilloscope screen.
Complete the sentence using the correct letters. [1]
The quietest sound is _______________ and the highest pitch sound is _______________.
3 When two sound waves meet, they can reinforce each other or cancel each other.
a The diagram shows the waveform of one sound wave.
On the grid below, draw the waveform of a wave that will reinforce this sound. [1]
Cambridge Lower Secondary Science 9 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021 1
CAMBRIDGE LOWER SECONDARY SCIENCE 9: END-OF-UNIT TEST
b A sound wave, P, can be heard clearly. Wave P has constant frequency and constant amplitude.
Another sound wave, R, cancels P completely.
i Describe what is heard when P and R cancel. [1]
_________________________________________________________________________
ii State how wave P must compare with wave R, if they cancel completely. [1]
Amplitude of P compared to R is ______________________________________________
Frequency of P compared to R is ______________________________________________
4 The list shows four theories, A–D, of how the Moon was formed.
A The Moon was formed as a separate object at the same time as the Earth.
B The Moon was a passing object that was captured into orbit around the Earth.
C The Moon was formed after a collision between Earth and another large object.
D The Moon split away from the Earth soon after the Earth was formed without a collision.
Which theory is currently accepted by most scientists? [1]
Write the letter: _______________
5 Many different nebulae have been discovered.
a Describe what nebulae are. [1]
____________________________________________________________________________
b A dark nebula is a type of nebula that does not emit light. A dark nebula looks dark because
it blocks the light from stars that are behind it.
Suggest why dark nebulae are thought not to contain stellar nurseries. [1]
____________________________________________________________________________
____________________________________________________________________________
____________________________________________________________________________
Cambridge Lower Secondary Science 9 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021 2
CAMBRIDGE LOWER SECONDARY SCIENCE 9: END-OF-UNIT TEST
6 The Earth’s crust is made from many tectonic plates.
a The Nazca tectonic plate is moving towards the north-east at a speed of 4 to 5 cm per year.
State what causes this movement. [1]
____________________________________________________________________________
b The Nazca plate has a boundary with the South American plate. Earthquakes frequently
occur close to this boundary.
Explain how these earthquakes are evidence for tectonic plates. [1]
____________________________________________________________________________
____________________________________________________________________________
____________________________________________________________________________
Cambridge Lower Secondary Science 9 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021 3
