Question

State any three effects of heat.

Answer 1

Following are the three effects of heat:

Change in temperature:-

Whenever a substance is heated its temperature rises and it becomes hot. On the other hand, if a hot substance gives out heat, its temperature falls.

Thermal expansion/contraction:-

When heat energy is supplied to a substance its dimension increases. On the other hand, a substance contracts on cooling.

Change in the state:-

On gaining heat energy a solid may change into a liquid state or a liquid may change into a gaseous state. On the other hand, a gas on losing energy may change into a liquid and a liquid on losing energy may change into a solid.