Temperature

Front

What is the direction of heat flow in nature?

Back

Heat always flows from a warm object to a cold object.

Front

What is the state of molecules in a substance at temperatures above absolute zero?

Back

Molecules are always in motion.

Front

What happens to objects when they are heated?

Back

They expand.

Front

What is heat in terms of energy?

Back

Heat is the movement of thermal energy.

Front

How does the speed of molecules relate to temperature?

Back

The slower molecules move, the less temperature they have.

Front

What is absolute zero?

Back

Absolute zero is the theoretical temperature at which molecular motion stops.

Front

What is thermal energy?

Back

Thermal energy is the total kinetic energy of the molecules in a substance.

Front

What is the relationship between temperature and molecular motion?

Back

Temperature is a measure of the average kinetic energy of the molecules in a substance.

Front

What occurs to the volume of a substance when it is heated?

Back

The volume of a substance generally increases when it is heated.

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials.