Benchmark 3 review

Front

What are the three main processes by which thermal energy is transferred?

Back

Conduction, radiation, and convection.

Front

Define conduction.

Back

The transfer of thermal energy that occurs in solids, liquids, and gases when two substances of different temperatures touch.

Front

What is radiation?

Back

The transfer of energy by the movement of electromagnetic waves or subatomic particles.

Front

Explain convection.

Back

Heat transfer caused by the rising of hotter, less dense fluids and the falling of cooler, denser fluids.

Front

What is the difference between heat and thermal energy?

Back

Heat is thermal energy being transferred from one place to another, while thermal energy is the total energy of all moving particles in an object.

Front

How does heat flow between objects of different temperatures?

Back

Heat always moves from the warmer object to the cooler object until their temperatures are equal.

Front

Why do warm air particles rise?

Back

As particles increase their speed, they move farther apart, making the group lighter than the cooler surrounding particles.

Front

What happens to thermal energy in a light bulb?

Back

Electrical energy is converted into light energy and some changes into heat energy, which is considered wasted energy.

Front

How does a refrigerator stay cool?

Back

It uses the properties of gases to transfer heat, with a compressor and an expansion valve controlling the flow of a cooling substance.

Front

Describe what happens when you touch a hot burner.

Back

Heat moves from the hotter burner to your cooler hand, making your hand feel warm.