WONDER #1789: How Do Refrigerators Work?

Question 1 of 3

A gas does what upon expansion?

1. cools
2. warms
3. heats
4. solidifies

Question 2 of 3

The refrigerant is in what state when it enters the expansion valve?

1. solid
2. liquid
3. gas
4. plasma

Question 3 of 3

Which of the following is NOT one of the basic components of a refrigerator?

1. fluid refrigerant
2. compressor
3. expansion valve
4. heating element

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