Front

What happens to thermal energy when two samples come in contact?

Back

Energy flows from the warmer sample to the cooler sample.

Front

When does heat transfer stop between two samples?

Back

Heat transfer stops when both samples reach the same temperature.

Front

What is the best definition of temperature?

Back

A measure of the average speed of the molecules of a substance.

Front

What happens to molecules when they gain energy?

Back

Molecules speed up when they gain energy from other molecules.

Front

What happens to the temperature of a sample when its molecules speed up?

Back

The temperature of the sample increases.

Front

What is thermal energy?

Back

The total kinetic energy of all the particles in a substance.

Front

What is conduction?

Back

The transfer of heat through direct contact between materials.

Front

What is convection?

Back

The transfer of heat through the movement of fluids (liquids or gases).

Front

What is radiation?

Back

The transfer of heat through electromagnetic waves.

Front

What is the relationship between temperature and kinetic energy?

Back

As temperature increases, the average kinetic energy of the molecules increases.