Front

What is thermal energy?

Back

Thermal energy is the total kinetic energy of the particles in a substance, which is related to its temperature.

Front

What happens to molecules when an object gets hotter?

Back

When an object gets hotter, its molecules move faster and have more kinetic energy.

Front

What is equilibrium in the context of thermal energy?

Back

Equilibrium occurs when two colliding systems reach the same temperature, and energy transfer stops.

Front

What happens to energy in a closed system when one part increases?

Back

When energy increases in one part of a closed system, it decreases in another part.

Front

How does heat transfer occur between two objects?

Back

Heat transfer occurs from the hotter object to the colder object until they reach the same temperature.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of motion, which increases as the speed of an object increases.

Front

What is the relationship between temperature and molecular movement?

Back

As temperature increases, the movement of molecules increases; as temperature decreases, molecular movement slows down.

Front

What is conduction?

Back

Conduction is the transfer of thermal energy through direct contact between materials.

Front

What is convection?

Back

Convection is the transfer of thermal energy through the movement of fluids (liquids or gases) caused by differences in temperature.

Front

What is radiation?

Back

Radiation is the transfer of energy through electromagnetic waves, such as heat from the sun.