CONDUCTION,CONVECTION AND RADIATION

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials. It occurs when two objects at different temperatures touch each other.

Front

Give an example of conduction.

Back

An ice cube melting in a person’s hand is an example of conduction.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases). It occurs when hot liquid or air expands, becomes less dense, and rises, while cooler, denser liquid or air sinks.

Front

Give an example of convection.

Back

A pot of water on a stove boiling is an example of convection.

Front

What is radiation?

Back

Radiation is the transfer of heat through electromagnetic waves. It does not require a medium (like air or water) to transfer heat.

Front

Give an example of radiation.

Back

The heat from a lamp warming a lizard is an example of radiation.

Front

What happens to air when it is heated?

Back

When air is heated, it expands, becomes less dense, and rises.

Front

What happens to air when it cools?

Back

When air cools, it becomes denser and sinks.

Front

How does a hot biscuit warm a plate?

Back

A hot biscuit warms the plate through conduction, as heat is transferred from the biscuit to the plate.

Front

What is an example of heat transfer by radiation?

Back

A car’s inside temperature rises to over 100 degrees on a sunny day due to radiation from the sun.