Page 88 - ScienceStd4

2. Metal and wood are good conductors of heat.

3. Heat can travel through solids, liquids and gases.

4. We dry crops using heat energy.
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5. Heat and temperature have the same meaning.

Section B: Questions with short answers

6. Name any three materials that are good conductors of
heat.

7. Explain the importance of heat energy at home.

8. Why are the handles of cooking pots or irons made of
plastic or wood?

9. Why do some clothes take a long time to dry during the
rainy season?

10. Why are we advised to wear sweaters and use blankets

during cold weather?

Light energy

Light energy is a type of electromagnetic radiation. There are two
main sources of light energy: natural and artificial light sources.

Examples of natural light sources are stars including the sun,
lightning and bioluminescent organisms such as fireflies. The
artificial light sources include fire, flashlights, candles and

fireworks. Figure 6 shows sources of light energy.

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