Changes Around Us

Which one of the steps while burning a candle is not reversible?

• Melting of solid wax

• Wax vapour bums into flame

• BOTH

Burning of wood in a chulha is a tan change.

Heat is a form of …………. .

• HOT AND HEATNESS

• ENERGY

• HEAT SUBSTANCE

Pressure is equal to the force per unit second.

• TURE

• FALSE

Change of seasons is a natural change.

• TURE

• FALSE

Formation of clouds is an irreversible change

TURE OR FALSE

Which is a way to make a change happen?

• Heating a substance

• Cooling a substance

• Mixing a substance with another substance

• All of these

. On cooling, liquid …………… into solid.

JUST ANSWER

Melting of candle wax is a/an ……………………. change.

• ENERGY

• IREVERSIBLE

• REVERSIBLE

Conversion of a liquid to vapour by heating is called ………….. .

• evaporation

• condenstion

• BOTH