Heat

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases). It occurs when warmer areas of a liquid or gas rise and cooler areas sink, creating a current.

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials. It occurs when heat moves 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

What is a convection current?

Back

A convection current is a continuous cycle of rising warm fluid and sinking cool fluid, which helps distribute heat within a fluid.

Front

Why does a metal spoon feel hot when touching boiling water?

Back

The metal spoon feels hot due to conduction, as heat is transferred from the hot water to the spoon through direct contact.

Front

Heat always moves from an object of __________ temperature to an object of __________ temperature.

Back

higher, lower

Front

What is an example of conduction in everyday life?

Back

An example of conduction is when you touch a hot stove and feel the heat transfer to your hand.

Front

What is an example of convection in nature?

Back

An example of convection in nature is the formation of wind, where warm air rises and cool air moves in to replace it.

Front

What is an example of radiation in everyday life?

Back

An example of radiation is feeling the warmth of the sun on your skin, even when you are not in direct contact with it.

Front

What role does air play in convection?

Back

Air acts as a fluid in convection processes, allowing warm air to rise and cool air to sink, creating convection currents.