(1) The process that dries clothes in the Sun is called superficial expansion.

(2) Condensation can happen at any temperature.

(3) Evaporation happens only from the surface of a liquid.

(4) On heating, glass expands more than steel.

(5) In bimetallic strip the curve happens on the side of metal with lower expansion.

(6) Temperature remains constant as long as boiling happens.

(7) The density of a liquid at higher temperature will be more.

(8) The expansion in liquids is of superficial type.

(1) A reason for increased evaporation of liquid at room temperature is increase of ____________.

(2) The process of boiling happens at ____________.

(3) Change of state from gaseous to solid state is called ____________.

(4) In a pressure cooker water boils at ____________ temperature.

(5) In thermal expansion the space between the molecules ____________.

(6) Superficial expansion is the increase in ____________.

(7) Kinetic energy of hot objects is always ____________.

(8) The density of water is maximum at ____________.

(9) Mercury is used in thermometers because it has a ____________ expansion.

(10) Liquids expand ____________ than gases.

(3) How does the density of a solid change when its temperature falls?

(4) When ice melts what is the change in its volume?

(5) What is coefficient of linear expansion of solids?

(9) Name a practical application of thermal expansion of liquids.

(1) Why evaporation produces cooling?

(2) Name three factors that affect evaporation?

(6) What is the reason for sagging of electrical cables in summer?

(7) Why do railway lines have gaps have gaps between them?

(8) Why liquids and gases do not have linear expansion?

(10) Water boils at lower temperature at hill stations, how does it affect cooking?

(6) Explain the factors on which volume expansion of a metal ball depends?

(10) Explain why liquids and gases have greater thermal expansion than solids.

(2) Give three differences between evaporation and boiling.

(1) How kinetic theory explains evaporation?

(3) What are the factors that affect the linear expansion of solids?

(4) Name three types of expansion in solids and the relationship between them?

(5) Explain the functioning of a bimetallic strip.

(7) Temperature of a boiling liquid does not change, so why will its temperature change if heating is stopped?

(8) How can you prove that different liquids have different coefficient of expansion?

(9) Explain why substances expand upon heating?

At high altitudes

In the beginning the container expands on heating

They have high intermolecular spaces.

It evaporates faster

They are not heated at the same temperature

Rod Y will expand less than rod X, because its initial temperature is more.

Expansion of the cables

When we heat liquids their density usually decreases.

Liquid is more volatile

They are not heated at the same temperature

Thermal expansion in solids is less than gases but more than liquids.

When we heat liquids their density usually decreases.