Conduction, convection, and Radiation Practice

Front

What is conduction?

Back

Conduction is the transfer of heat through a solid material without any movement of the material itself. It occurs when two objects at different temperatures are in direct contact.

Front

What is convection?

Back

Convection is the transfer of heat through fluids (liquids and gases) caused by the movement of the fluid itself. Warmer, less dense fluid rises while cooler, denser fluid sinks.

Front

What is radiation?

Back

Radiation is the transfer of heat in the form of electromagnetic waves, such as infrared radiation. It does not require a medium and can occur in a vacuum.

Front

Example of conduction in everyday life?

Back

An ice cube melting in a person’s hand is an example of conduction, where heat is transferred from the hand to the ice.

Front

Example of convection in weather systems?

Back

Convection causes warm air to rise and cool air to sink, leading to the formation of wind and weather patterns.

Front

Example of radiation in daily life?

Back

The sun heating the Earth is an example of radiation, where heat travels through space.

Front

What happens to heat flow between substances?

Back

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

Front

How does a microwave cook food?

Back

A microwave cooks food using radiation, specifically microwaves that excite water molecules in the food, generating heat.

Front

What is thermal equilibrium?

Back

Thermal equilibrium is the state in which two objects in contact with each other reach the same temperature and no heat flows between them.

Front

What role does conduction play in cooking?

Back

Conduction is important in cooking when heat is transferred from a hot pan to the food in contact with it.