What are clouds

What are clouds made of?

• Large sheets of ice

• Millions of tiny water droplets or ice crystals

• Invisible gas particles

• Solid blocks of water

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What happens during evaporation in the water cycle?

• Water turns into ice and falls to the ground

• Water disappears completely

• Liquid water turns into gas and rises into the air

• Water becomes solid and floats in the air

What does relative humidity measure?

• The speed of air currents

• The total amount of water vapor in the air

• The percentage of water vapor the air can hold at a given temperature

• The temperature of the air

What happens when air cools to its dew point?

• The air becomes completely dry

• The air expands and holds more water vapor

• Water vapor turns into tiny liquid droplets

• The air becomes warmer

Which of the following is NOT an ingredient for cloud formation?

• Water vapor

• Microscopic particles like dust or salt

• Strong winds

• A way to cool air to its dew point