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Physical Science, 5/e
Bill Tillery, Arizona State University

Earths Waters

Essay Quiz



1

How are the waters of the earth distributed as a solid, a liquid, and a gas at a given time? How much of the water is salt water and how much is freshwater?
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2

Describe the hydrologic cycle. Why is the hydrologic cycle important in maintaining a supply of freshwater? Why is the hydrologic cycle called a cycle?
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3

Describe in general all the things that happen to the water that falls on the land.
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4

Explain how a stream can continue to flow even during a dry spell.
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5

What is the water table? What is the relationship between the depth to the water table and the depth that a well must be drilled? Explain.
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6

Compare the advantages and disadvantages of using (a) surface water, and (b) groundwater as a source of freshwater.
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7

Prepare arguments for (a) agriculture, (b) industries, and (c) cities each having first priority in the use of a limited water supply. Identify one of these arguments as being the "best case" for first priority, then justify your choice.
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8

Discuss some possible ways of extending the supply of freshwater.
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9

The world's rivers and streams carry millions of tons of dissolved materials to the ocean each year. Explain why this does not increase the salinity of the ocean.
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10

What is swell and how does it form?
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11

Why do waves always seem to approach the shore head-on?
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12

What factors determine the size of an ocean wave made by the wind?
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13

Describe how a breaker forms from swell. What is surf?
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14

Describe what you would look for to avoid where rip current occurs at a beach.
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