Concept 2.2

Any matter has thermal energy, because………………

• It’s molecules always move

• It’s molecules don’t move

• It has fixed shape

• It has fixed volume

If heat transfers to a lower temperature object, it’s molecules will. ………………..

• Stop moving

• Move slower

• Move faster

• Not be affected

Heat is the flow of ………………. energy

• Electric

• Solar

• Thermal

• Kinetic

Heat can be …………….

• Transferred

• Lost

Heat transfers from ………….. object to ……………… object

• Cooler - hotter

• Hotter - cooler

• Bigger - smaller

• Smaller - bigger

The handle of electric iron is made of …………….

• Iron

• Thermal insulator material

• Metal

• Thermal conductor material

All the following are properties of heat, except ………….

• It is an essential component of life on Earth

• It cannot be lost but it is only transferred

• It flows from a cooler object to a hotter object

• It flows from a hotter object to a cooler object

If you stand on hot sand in bare feet, you will feel the hotness of the sand, because ………………

• Heat transfers from your legs to sand

• Your legs are hotter than sand

• Heat transfers from sand to your feet

• Your legs and sand have the same temperature

If you hold an ice cube in your hand, which of the following sentences is correct ?

• Your hand temperature is lower than the ice temperature

• The ice temperature is higher than your hand temperature

• The ice and your hand have the same temperature

• The molecules of ice will start to move faster

Heat is transferred through solids by …………….

• Radiation only

• Conduction and convection

• Conduction only

• Radiation and convection