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491 © Pearson Education Limited 2002Exploring Science for QCA Copymaster File 8

8K End of Unit Test

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Name Class

1 Which sentence about light is correct? Tick the right box.

Light cannot travel through air.

Light cannot travel through stone.

Light cannot travel through a vacuum.

Light cannot travel through water.

[1 mark]

2 It is night time and the table lamp is lit.

a Which object in the picture is a luminous source?

[1 mark]

b Give an example of an opaque object.

[1 mark]

c Give an example of a transparent object.

[1 mark]

d On the diagram draw a ray of light from the lamp that reflects from the book to the girl’s eye. Put an arrow on your light ray to show the direction the light is travelling. [2 marks]

3 Each diagram shows a mirror with a ray of light hitting it. Put a tick in the box nextto the diagram where the ray is reflected correctly.

[1 mark]

4

Draw a ray of light on the diagram to show how the person can see the ball.

[3 marks]

5 This diagram shows reflections from a rough surface.

a What is the dotted line called?

[1 mark]

b Why are you not able to see an image in the surface?

[1 mark]

492 © Pearson Education Limited 2002Exploring Science for QCA Copymaster File 8

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A

C

B

D

6 The diagram below shows a ray of light entering a glass block.

a As the light goes into and out of the glass block it changes direction.

What is this effect called? [1 mark]

b Complete the ray of light on the diagram to show what happens when the

light goes into and comes out of the block. [2 marks]

7 The diagram below shows a white light passing through a prism and forming aspectrum on a white screen.

a Why do we see a spectrum of different colours?

[2 marks]

b A pupil puts a red filter in the ray of white light. What happens to the spectrum?Put a tick in the correct box.

All the spectrum turns red.

All the spectrum disappears.

The red part disappears but the rest stays the same.

The red part of the spectrum stays the same but the other colours disappear.

[1 mark]

redorangeyellowgreenblueindigoviolet

ray of white light

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c What would happen if you put a blue filter in the ray of light coming from thered filter? Explain your answer.

[2 marks]

8 This is Joe ready to go clubbing.

a What colour will his clothes appear in a green disco light?

i His red cap will look .

ii His white shirt will look .

iii His green trousers will look . [3 marks]

b Why will his cap look the colour you have described?

[2 marks]

white shirt

red cap

green trousers

494 © Pearson Education Limited 2002Exploring Science for QCA Copymaster File 8

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