Thermal Energy & Heat Review

Front

What is convection?

Back

Convection is the transfer of thermal energy through the movement of fluids (liquids or gases). It occurs when warmer, less dense fluid rises and cooler, denser fluid sinks, creating a current.

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials. It occurs when heat is transferred from a hotter object to a cooler one through molecular collisions.

Front

What is radiation?

Back

Radiation is the transfer of heat in the form of electromagnetic waves. It does not require a medium to travel through, allowing heat to be transferred through empty space.

Front

How does heat flow between substances?

Back

Heat always flows from a hotter substance to a colder substance until thermal equilibrium is reached.

Front

What happens to the density of air when it is heated?

Back

Warm air is less dense than cold air, causing it to rise and create convection currents.

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 is the difference between heat and temperature?

Back

Heat is the energy transferred between substances due to a temperature difference, while temperature is a measure of the average kinetic energy of the particles in a substance.

Front

What is an example of conduction?

Back

An example of conduction is a metal spoon getting hot when placed in a pot of boiling water.

Front

What is an example of convection?

Back

An example of convection is the warm air rising from a heater and circulating throughout a room.

Front

What is an example of radiation?

Back

An example of radiation is feeling the warmth of the sun on your skin, even when standing in the shade.