Light and Sound
Deborah Gauci Light and Sound
1. Luminous objects ________ their own light.
2. Examples of natural sources of light are (Choose 3)
sun
bulb
lightning
fire
torch
3. Examples of artificial sources of light are (choose 3)
mobile
lamp
candle
book
4. Choose 4 objects which reflect light (light reflectors)
chair
sun
table
book
bag
5. Light travels in ___________ lines.
6. To protect our eyes, we (choose 1)
wear sunglasses
look directly at the sun
7. Sound _________ travel in a vacuum.
8. Sound is made when objects ________
9. Sound _________ travel through solids, liquids and gases.
10. Sound vibrations travel best through _________ because the molecules of a solid are closely packed.
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