Which of these is a source of light?

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Which one of these is the most important source of light on earth?

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Identify the natural sources of light

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Some of these items do NOT produce light.

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We cannot see if there is no ....

• heat

• light

• sound

Select the things that give out heat

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What gives out sound?

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Which sound in the picture are loud?

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... is soft.

• A lion's roar.

• A whisper

• A thunder

• An alarm bell

The picture shows that sound ....

• tells people what to do

• helps us to relax

• warns us of danger

• keeps us warm