Thermal Energy Transfer

When two materials that are in contact have the same temperature, the materials are said to be in thermal

• expansion

• equilibrium

• heat

Heat always moves from ________________ objects to ______________ objects.

• hot; cold

• cold; hot

• doesn't matter

Hot water is poured into a mug and the mug gets hot. This is an example of which type of energy transfer?

• radiation

• conduction

• this is not an energy transfer

Radiation transfers energy by moving matter.

• True

• False

A hot iron is turned off and cools down to room temperature. The iron cools because_____________________.

• The iron does not hold heat very well.

• The room transfers cold energy to the iron.

• Thermal energy is transferred from the warm iron TO the cooler room.

• Thermal energy is destroyed during an interaction with the room.

Which type of energy transfer allows the sun to warm Earth?

• Conduction

• Convection

• Radiation

• Transmission

Which type of energy transfer is responsible for the movement of magma in Earth's interior? (HINT: magma is a liquid!)

• Conduction

• Convection

• Radiation

What enables fireman to enter buildings that are on fire and return from them safely?

• Convection cells keep fire away.

• The heat makes the building expand so there is no more room.

• Fireman wear heat resistant suits.

• They are really fast.

Heat transfer always occurs

• from cold to hot.

• from hot to cold.

• in any direction.

Thermal energy ALWAYS moves from _____ to _____.

• solid to liquid
• ice to water
• hot to cold
• solid to gas