Page 224 - Primary Five Science

Sources of Heat

Uses of Heat energy

Heat energy is useful in many ways.

 It enables processes in our bodies to work well

 to cook food

 Heat is key in formation of rainfall

 Many times heat produce light which helps

sight

 Heat is used to kill germs

 Heat from the sun provides warmth to

seeds to enable growth
.
Effects of heat on matter

 Heat causes temperature of matter to increase

 Heat can cause change of state. E.g. from solid to liquid

 Heat causes expansion