Thermal energy transferring

The transfer of energy through matter by the direct contact of particles is called __.

• Conduction

• Convection

• Radiation

• Thermal energy

__ is the transfer of energy in the form of electromagnetic waves. 

• Radiation

• Conduction

• Convection

• Temperature

Which type of energy transfer does not require matter?

• Radiation

• Conduction

• Convection

The handle of a metal spoon warms up when it is placed in a hot bowl of soup because of

• convection

• conduction

• radiation

Ironing a shirt is an example of _____

• Conduction

• Convection

• Radiation

A hot air balloon rising into the sky is an example of _____.

• Conduction

• Convection

• Radiation

An iron bar is held with one end in a fire. The other end soon becomes too hot to hold. hand
iron bar How has the heat travelled along the iron bar? 

•  by conduction
• by convection
• by expansion
• by radiation fire 

The diagram shows a cooling unit in a refrigerator. Why is the cooling unit placed at the top? 

• Cold air falls and warm air is displaced upwards.
• Cold air is a bad conductor so heat is not conducted into the refrigerator.
• Cold air is a good conductor so heat is conducted out of the refrigerator.
• Cold air stops at the top and so prevents convection. 

A heater is placed in a room.
Which diagram shows the movement of air as the room is heated? 

• A
• B
• C
• D

The heat from a lamp allows a lizard to remain warm. This is an example of which type of heat transfer?

• radiation
• conduction
• convection
• insulation