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8I

End of Unit Test Standard (S)

Name

Class

Date

1 This boat has an engine. a Draw an arrow to show the direction of the force from the engine. [1 mark] b How will this force affect the boat?

[1 mark] 2 a The table describes some properties of solids, liquids and gases. Tick the boxes to show which states have which properties. Property

Solid

Liquid

Gas

Fixed volume Compressible Fixed shape

[3 marks] b Each circle in the diagrams below represents a particle of a substance. Put a ring around the diagram which shows the arrangement of particles in a solid.

[1 mark] c Use the particle model to explain which states of matter can be compressed.

[2 marks]

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8I

End of Unit Test Standard (S)

3 The graph shows how the temperature of a block of ice changes as it is heated.

a

In what state is the substance at point E? [1 mark]

b What is happening to the ice at X? [1 mark] c What temperature is B? [1 mark] d Explain why this is a physical change, not a chemical change.

[1 mark] e Give one example of a chemical change.

[1 mark] 4 Icebergs float in water. a Draw an arrow on the iceberg to show the direction of the upthrust. [1 mark] b Is ice denser than water or less dense than water?

[1 mark]

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8I

End of Unit Test Standard (S)

5 This is the formula for working out density. density =

mass volume

An object has a mass of 60 g and a volume of 150 cm3 Calculate its density in g/cm3.

[2 marks] 6 A boy dives to a depth of 2 metres. The boy can feel pressure from the water. a What causes this pressure? Answer in terms of particles.

[1 mark] b The boy dives down to 4 metres. What will he notice about the pressure?

[1 mark] 7 Mrs Jones is pumping up a tyre on her car. a There is pressure from the air on the outside of the tyre. Write down a unit that can be used for measuring pressure.

[1 mark] b What happens to the number of particles in the tyre as Mrs Jones pumps it up?

[1 mark] c What will happen to the pressure of air inside the tyre?

[1 mark] 8 a What affect does ‘drag’ have on a moving object? [1 mark]

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8I

End of Unit Test Standard (S)

b The picture shows an Olympic cyclist. Give 2 ways in which the drag on the cyclist has been reduced. [2 marks] c A parachutist has more drag when she opens her parachute. Explain why. [1 mark] 9 John is doing an experiment into floating and sinking. He knows the density of some mystery objects and is predicting whether they will float. Look at the table. Object Density (g/cm3) A

0.34

B

1.76

C

2.49

D

0.57

The density of water is 1 g/cm3. Which objects in the table will float? ______________________________________________________________________________ [2 marks] John notices that when he pushes one of the floating objects under the surface of the water, it bobs back up. Explain why this happens using the word ‘upthrust’. __________________________________________________________________________ ___________________________________________________________________________ [2 marks]

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