Front

Why are liquids sometimes used in a thermometer?

Back

Because most liquids expand when heated and contract when cooled.

Front

What process causes the water around Bill's feet in a swimming pool to be cooler than the water near the surface?

Back

Convection.

Front

What happens to metal railroad tracks during the heat of a summer day?

Back

They increase in length.

Front

What is the best example of the transfer of heat by radiation?

Back

A lightbulb glowing.

Front

How do people sitting around a campfire feel the heat from the fire without touching it?

Back

The heat from the fire radiates from the fire to the people.

Front

What is conduction?

Back

The transfer of heat through direct contact between materials.

Front

What is convection?

Back

The transfer of heat through the movement of fluids (liquids and gases).

Front

What is radiation?

Back

The transfer of heat in the form of electromagnetic waves.

Front

What happens to the volume of most liquids when they are heated?

Back

They expand.

Front

What happens to the volume of most liquids when they are cooled?

Back

They contract.