heat transfer

Front

What is heat transfer?

Back

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

Front

What are the three main types of heat transfer?

Back

Conduction, Convection, and Radiation.

Front

Define conduction.

Back

Conduction is the transfer of heat through direct contact between materials, where heat moves from the hotter object to the cooler one.

Front

Define convection.

Back

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

Front

Define radiation.

Back

Radiation is the transfer of heat in the form of electromagnetic waves, such as sunlight, which can travel through a vacuum.

Front

What happens to molecules in hot substances?

Back

Molecules in hot substances move quickly and are more energetic compared to those in cold substances.

Front

What happens to molecules in cold substances?

Back

Molecules in cold substances move slowly and have less energy compared to those in hot substances.

Front

How does heat transfer occur when you hold an ice cube?

Back

Heat from your hand (warmer) is conducted to the ice cube (colder), causing it to melt.

Front

What is an example of convection in nature?

Back

An example of convection is the movement of magma in the Earth's mantle, where hot magma rises and cold magma sinks.

Front

What is an example of radiation?

Back

An example of radiation is the warmth felt from sunlight on your skin.