Thermal Energy Practice 24/25

Front

What is thermal energy?

Back

Thermal energy is the total energy of all the particles in an object due to their motion and position. It is related to temperature and heat.

Front

What is the process of energy transfer through radiation?

Back

Radiation is the transfer of energy through electromagnetic waves. An example is feeling warmth from the sun.

Front

What is the process of energy conversion in a cell phone when it is turned on?

Back

The process is Chemical > Electrical > Light, where chemical energy from the battery is converted to electrical energy, which then produces light.

Front

What happens to ice when heat is added?

Back

When heat is added to ice, the thermal energy causes the molecules to move faster, leading to melting.

Front

What is the relationship between heat and thermal energy?

Back

Heat is the transfer of thermal energy from a warmer object to a colder one, increasing the thermal energy of the colder object.

Front

What happens to a battery's energy when a flashlight is used?

Back

The battery's energy changes from chemical energy to electrical energy and light energy as the flashlight operates.

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials, where faster-moving particles transfer energy to slower-moving ones.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases) caused by differences in temperature and density.

Front

What is the difference between potential energy and kinetic energy?

Back

Potential energy is stored energy based on position, while kinetic energy is the energy of motion.

Front

What is an example of energy transfer through conduction?

Back

An example is touching a metal spoon that has been sitting in a hot pot; heat transfers from the pot to the spoon.