Heat transfer-Conduction Convection Radiation

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 physical touch.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases). It occurs when warmer parts of a fluid rise and cooler parts sink, creating a circulation pattern.

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, which means it can occur in a vacuum.

Front

How does a microwave heat food?

Back

A microwave heats food through radiation. The microwave emits waves that excite water molecules in the food, causing them to heat up.

Front

What type of heat transfer occurs when you touch a hot stove?

Back

Conduction occurs when you touch a hot stove, as heat is transferred directly from the stove to your hand.

Front

What type of heat transfer is involved in boiling water?

Back

Convection is involved in boiling water, as the hot water rises to the top and cooler water sinks to the bottom, creating a circulation.

Front

How does the sun warm the Earth?

Back

The sun warms the Earth through radiation, as sunlight travels through space and heats the surface of the Earth.

Front

What happens when you place a cold spoon in a hot soup?

Back

Conduction occurs as heat from the hot soup transfers to the cold spoon, warming it up.

Front

What is an example of convection in everyday life?

Back

An example of convection is when warm air rises and cool air sinks in a room, creating a draft.

Front

How does heat travel from a campfire to a person sitting nearby?

Back

Heat travels from a campfire to a person sitting nearby through radiation, as the heat is emitted in waves.