Unit 2 PreTest Review

Front

What is an insulator?

Back

An insulator is a material that does not allow heat or electricity to pass through it easily.

Front

Which material is a good insulator?

Back

Styrofoam is a good insulator because it traps air and reduces heat transfer.

Front

How does thermal energy move?

Back

Thermal energy moves from hot to cold objects.

Front

What happens to a metal spoon in a hot cup of tea?

Back

The metal spoon gets warm because heat is transferred from the hot tea to the spoon.

Front

Why do people use lids on cups of hot drinks?

Back

Lids are used to keep the drink warm by reducing heat loss.

Front

What is heat transfer?

Back

Heat transfer is the movement of thermal energy from one object to another.

Front

What are the three methods of heat transfer?

Back

The three methods of heat transfer are conduction, convection, and radiation.

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases).

Front

What is radiation?

Back

Radiation is the transfer of heat through electromagnetic waves, such as sunlight.