Thermal Energy Unit Review

Front

Warmer molecules move __________ than cooler molecules

Back

faster

Front

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

Back

The temperature of the sample increases.

Front

What is equilibrium in thermal energy?

Back

A balanced state in which a system is stable, such as when two samples are at the same temperature.

Front

Which system represents the best heating proposal for Riverdale Middle School?

Back

System Y because it represents Proposal #2, which heats the school longer.

Front

What happens to energy transfer when two objects are at different temperatures?

Back

Energy transfers from the warmer object to the cooler object until they reach equilibrium.

Front

What is thermal energy?

Back

The total energy of all the particles in an object, related to temperature.

Front

How does the size of a container affect the temperature of its contents?

Back

A larger container may have a lower temperature than a smaller one if the energy is spread out over more molecules.

Front

What is conduction?

Back

The transfer of thermal energy through direct contact between materials.

Front

What is convection?

Back

The transfer of thermal energy through the movement of fluids (liquids and gases).

Front

What is radiation?

Back

The transfer of thermal energy through electromagnetic waves, such as sunlight.