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), where warmer areas of a fluid rise and cooler areas sink.

Front

Define radiation.

Back

Radiation is the transfer of heat in the form of electromagnetic waves, which can occur in a vacuum, such as the heat from the sun.

Front

What happens to a metal spoon in boiling water?

Back

The metal spoon becomes too hot to touch because metals conduct heat better than wood.

Front

Why do lava lamps work?

Back

Lava lamps work through convection, where the heated wax rises and then cools down, sinking back down, creating a cycle.

Front

How does microwaving food heat it?

Back

Microwaving food heats it through radiation, as microwaves excite water molecules in the food, causing them to heat up.

Front

What is an example of conduction in everyday life?

Back

An example of conduction is touching a hot stove and feeling the heat transfer to your hand.

Front

What is an example of convection in everyday life?

Back

An example of convection is boiling water, where hot water rises to the top and cooler water sinks.