End of Unit Test
8G
Name
Class
1 Rocks are made from minerals. What is the best description of a mineral?
Tick one box.
8
G
a pure element
a mixture of different elements
a chemical compound
a mixture of rocks
[1 mark]
2 These diagrams show the textures of three different rocks.
a Which diagram shows a mixture of three different minerals?
[1 mark]
b Which two rocks are made from rounded grains?
[1 mark]
c Some rocks soak up water easily. Other rocks do not.
Explain why rocks A, C and D can soak up water but rock B does not.
[2 marks]
3 This gravestone has been standing for over 100 years.
It is made from limestone. Rain has fallen on it,
and chemical weathering has worn it away.
a What makes rainwater acidic?
[1 mark]
b What happens when rainwater weathers the gravestone?
[1 mark]
c Suggest a different kind of rock that the gravestone could have been made
from to make it last longer.
[1 mark]
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8G
End of Unit Test (continued)
C
B
The bottom of this river is covered in rocks and stones.
a How do the rocks get into the river?
[2 marks]
b Draw a sketch of a piece of rock you might find at A, and one you might find
at C. There should be two differences between your two drawings.
Rock from A.
Rock from C.
[2 marks]
c What caused the changes in the rocks?
[2 marks]
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8
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8G
End of Unit Test (continued)
5 Jane stirred some sand and gravel in a beaker full of water.
This is what happened to the mixture when she stopped stirring.
a In which beaker is the water moving the fastest?
A
8
G
Just after she stopped stirring.
15 seconds later.
10 minutes later.
[1 mark]
b Explain why there are layers in the sediment in diagram C.
[2 marks]
6 Rocks can be weathered by freezethaw action.
Describe how freezethaw action breaks up rocks.
[3 marks]
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8G
End of Unit Test (continued)
7 This diagram shows four places A, B, C and D. Each has different weather
conditions.
8
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B
C
A
D
dry desert
Place
Average temperature (C)
Day
Night
20
15
10
10
30
10
a At which place is freezethaw action most likely to happen?
Explain your answer
[3 marks]
b Which type of weathering is most likely to happen at D?
Explain your answer
[2 marks]
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