Chapter 11 Sect. 1: Water Resources

The ocean is an important part of the water cycle because

• a great deal of precipitation enters the world's oceans.

• a great deal of water evaporates from the world's oceans.

• the ocean is the source of nearly all of the Earth's water.

• All of the above.

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About how much of the water on Earth is available for human use?

• 77%

• 23%

• 3%

• a very small fraction

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Surface freshwater includes all of the following except

• lakes.

• oceans.

• rivers.

• wetlands.

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Which of the following best describes where rivers get their water?

• from runoff

• from precipitation

• through the water cycle

• from melting snowcaps and glaciers

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Watershed is another name for a

• divide.

• channel.

• tributary.

• drainage basin.

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Groundwater is defined as water that

• creates a water table.

• flows across the ground, or surface, of the Earth.

• collects where cracks occur naturally in the Earth.

• is located within the rocks below the Earth's surface.

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Which of the following statements about the water table is false?

• It can be at the surface in wet regions.

• It is the level where rocks and soil are saturated with water.

• It rises during dry seasons and drops during wet seasons.

• It can be hundreds of meters underground in desert regions.

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A(n) _____ is a(n)______ layer of rock that stores and allows the flow of groundwater.

• aquifer, porous

• aquifer, impermeable

• recharge zone, porous

• recharge zone, impermeable

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Which of the following statements about the Ogallala aquifer is false?

• Its water table has dropped dangerously low in some places.

• It runs beneath the ground through eight states.

• It is the largest known aquifer in North America.

• It has been used heavily by manufacturing plants.

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Which of the following statements about recharge zones is false?

• Recharge zones are environmentally sensitive areas.

• The water from recharge zones refreshes the water supply of an aquifer.

• Road and building construction in a recharge zone helps protect aquifers.

• A recharge zone is an area of permeable surface rock above an aquifer.

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