The Water Planet

How much of the earth's water is saltwater?

• 97%

• 3%

• 30%

• 70%

Freshwater is considered scarce because

• only about 3% of Earth's water is fresh and of that, 70% is frozen.

• 97% of Earth's water is fresh and of that, 70% is frozen

• only about 3% of water is fresh, of that 30% is frozen

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The continuous movement of water through environment of the Earth is called:

• water recycling

• the water cycle

• condensation

• precipitation

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An area of land in which water drains into a steam system which usually leads to an ocean is called

• divide

• drainage basin/watershed

• tributary

• river

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What is lake turnover?

• rising and sinking of cold and warm water layers in a lake

• the layers of water, with the warmest on top and the coolest at the bottom

• the physical process by which people stir up lakes

• the rising of nutrients in a lake

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What is a glacier?

• layers of ice and snow that quickly move on land

• layers of ice on water

• a large mass of ice and snow that slowly moves over land

• a permanently frozen layer of soil

What is an iceberg?

• A piece of ocean water that has frozen

• The thing that sank the Titanic

• A mass of ice floating in the ocean that broke off a glacier

• A type of lettuce

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In order for an aquifer to exist there must be

• a water source

• a semipermeable layer of rock or sediment

• an impermeable layer of rock or sediment

• a permeable layer of rock or sediment

The top of the area underground that is completely saturated with water is called

• saturation zone

• aquifer

• unsaturated zone

• water table

Aquifers are important because

• water that moves through the ground is filtered

• it allows water to move

• it is a source of freshwater

• they are not important

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