How Air Conditioners Make Cities Hotter

How do air conditioners cool the air inside a room?

• By adding energy to the air molecules

• By removing energy from the air molecules

• By increasing the speed of air molecules

• By decreasing the number of air molecules.

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What happens to the air outside when an air conditioner is running?

• It becomes cooler

• It becomes hotter

• It remains the same

• It becomes more humid.

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What is the result of the energy transfer from the forehead to the washcloth?

• The forehead gets warmer.

• The washcloth gets cooler.

• The forehead cools down.

• The washcloth stays the same.

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Why does the same washcloth not keep you cool forever?

• It eventually becomes the same temperature as the forehead.

• It creates more energy.

• It destroys energy.

• It stops transferring energy.

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What must happen for energy transfer to continue providing relief?

• The washcloth must be heated.

• A new, cool washcloth must be used.

• The forehead must be warmed.

• The washcloth must be dried.

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What does the diagram illustrate about the molecules in the washcloth and forehead?

• Molecules in the washcloth move faster than those in the forehead.

• Molecules in the forehead move faster than those in the washcloth.

• Molecules in both move at the same speed.

• Molecules in the washcloth are stationary.

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What is the key concept illustrated by the energy transfer process?

• A) Energy can be created.

• B) Energy can be destroyed.

• C) Energy is transferred from one place to another.

• D) Energy remains constant.

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What happens to the molecules of your forehead as they transfer energy to the washcloth?

• They speed up.

• They slow down.

• They stop moving.

• They remain unchanged.

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