Thermal Energy Transfer

Front

What are the three ways heat transfers?

Back

Convection, Radiation, Conduction

Front

What is a thermal conductor?

Back

A substance that conducts thermal energy well.

Front

What is a thermal insulator?

Back

A substance that conducts very little thermal energy.

Front

Why do metals feel cold to the touch?

Back

Metals are good conductors and quickly conduct heat away from your hand.

Front

What happens to the temperature of a liquid or gas when it is heated?

Back

The heated molecules expand, become less dense, and rise.

Front

What is convection?

Back

The transfer of heat through liquids and gases due to density differences.

Front

What is thermal radiation?

Back

Infrared radiation emitted by all objects, which does not require a medium to travel.

Front

How does surface color affect thermal radiation?

Back

Matt black surfaces are the best emitters and absorbers, while shiny surfaces are the best reflectors.

Front

What is the greenhouse effect?

Back

The trapping of heat in a greenhouse due to thermal radiation.

Front

What is the role of a vacuum in a vacuum flask?

Back

It reduces heat loss by conduction and convection.