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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