Thermal energy and heat transfer

Front

What is thermal energy?

Back

Thermal energy is the total kinetic energy of moving particles in a substance.

Front

What is heat transfer?

Back

Heat transfer is the movement of thermal energy from one object or substance to another.

Front

What is conduction?

Back

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

Front

What is convection?

Back

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

Front

What is radiation?

Back

Radiation is the transfer of heat in the form of electromagnetic waves, such as sunlight.

Front

What happens to particles in a substance when it is heated?

Back

The particles move faster and spread apart, increasing the substance's thermal energy.

Front

What is density?

Back

Density is the mass of a substance divided by its volume, often determining whether it will float or sink in a fluid.

Front

Which is denser: oil or water?

Back

Water is denser than oil, which is why oil floats on water.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of movement; the faster an object moves, the more kinetic energy it has.

Front

How does temperature affect thermal energy?

Back

As temperature increases, the thermal energy of a substance also increases.