Heat and its effects

Heat is a _____________

When we rub our hands mechanical energy changes into _

• Heat energy

• Thermal energy

• both

If an electric bulb is lit, it will get hot after few hours because

• Electric energy will change into heat energy

• Electric energy will change into light energy

An object will have more heat energy if its kinetic energy is

• more

• less

• normal

The liquid (Mercury ) rises in thermometer if, kept in hot water bath because

• Liquid expands on heating

• Liquid contracts on heating

• Mercury moves if its disturbed

The balloon increases in size because

• The air inside the balloon expands on heating

• The air increases its weight on heating

Gases expands quickly because

• The space between their particles is more

• They have weak forces between their particles

• Both answers are correct

Gases expand more________ than liquids

When particles absorb heat their ____________ energy increases

• Kinetic Energy

• Potential Energy