Earth and Human Activity

What is a scarcity of water?

• when water is in short supply

• when there is an abundance of water

• when there is so much water it causes flooding

• when water causes people to be scared

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What is the purpose of a Desalination Plant? (how does it help with water supply?)

• it sells fresh water in plastic water bottles

• it makes different flavors of water

• it removes salt from seawater to make clean drinking water

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How do astronauts in space use their limited supply of water?

• NASA sends new water from Earth to the astronauts in space.

• Astronauts recycle their "used" water by filtering and reusing it.

• Most space ships now include running water faucets.

What is conservation?

• when water changes from a liquid to a solid

• using extra resources

• protecting the resources we have

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Which of the following is NOT a way to FIX the problem of short supply of water?

• Bring in water from other sources

• Desalination plants to turn seawater into drinking water

• Recycle and reuse water

• Take longer showers

Earth has a certain amount of water that's been circling the globe for _____

• dozens of years
• hundreds of years
• thousands of years
• millions of years

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The vast majority of the world's water is _____

• in reservoirs
• in lakes and rivers
• in the ocean
• trapped in icebergs

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The processes of evaporation, condensation and precipitation are part of _____

• the water cycle
• the hydrogen wheel
• the carbon circuit
• the liquid circle

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Which process takes water from the surface of the ocean and turns it into water vapor?

• sublimation
• evaporation
• condensation
• precipitation

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In general, water released from clouds is called _____

• sublimation
• evaporation
• condensation
• precipitation

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