Conduction Convection and 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, less dense areas of a fluid rise and cooler, denser areas 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, allowing heat to be transferred through empty space.

Front

How does a microwave transfer heat?

Back

A microwave primarily uses radiation to transfer heat, cooking food by emitting microwave radiation that excites water molecules in the food.

Front

Why does the handle of a metal spoon get warm in hot soup?

Back

The handle warms up due to conduction, as heat is transferred from the hot soup to the spoon through direct contact.

Front

What type of heat transfer occurs when friends gather around a fire?

Back

The heat from the fire reaches the friends through radiation, as the warmth travels through the air.

Front

How does a lamp keep a lizard warm?

Back

The heat from the lamp warms the lizard through radiation, as the heat travels in waves from the lamp to the lizard.

Front

What happens to an egg on hot pavement?

Back

The pavement conducts heat to the egg, cooking it as the heat moves from the hot surface to the cooler egg.

Front

What is an example of convection in everyday life?

Back

An example of convection is the way warm air rises and cool air sinks in a room, creating a circulation of air that helps distribute heat.

Front

What is the difference between conduction and convection?

Back

Conduction involves heat transfer through direct contact, while convection involves heat transfer through the movement of fluids.