Science Revision 3 Year 3.4

Is fire a light source? (A light source is something that makes its own light)

• Yes

• No

Is the sun a natural or an artificial source of light?

• Natural

• Artificial

Is a candle a natural or an artificial source of light?

• Natural

• Artificial

This picture is called an optical illusion because it tricks your ____________________ and brain. In fact, in this picture you can see a young woman and an old woman.

Do we have goose bumps to keep warm or to cool down?

• To keep warm

• To cool down

Do we sweat to keep warm or to cool down?

• To keep warm

• To cool down

Is a plastic cup good to hold your hot drink?

• Yes.

• No.

Do we shiver to keep warm or to cool down?

• To keep warm.

• To cool down.

Which of these use electricity to work?

• television

• photo frame

• microwave

Before electricity, what did they use to light places?

• Light bulbs

• Candles