Geollllll

Ground Water and Lakes

1. In some karst areas, there are closed depressions kilometers across. They form by:

a. coalescence of small sinkholes

b. collapse of vast caverns all at once

c. movements of the earth's crust

d. drying out of ancient lakes

2. To prevent long-term pollution of ground water, it is most important to protect:

e. The recharge Zone

f. The area around the well

g. Streams and lakes

h. Springs and seeps

3. Most of the earth's water is:

i. Lakes and rivers

j. ground water

k. Ocean water

l. Glacial ice

4. One of the factors in the eruption of a geyser:

m. The boiling point of water increases with pressure

n. Hot water contains more minerals than cold water

o. Geyser water is full of high-pressure gases

p. Geyser water is unusually pure

5. Geysers can be destroyed by:

q. Minerals plugging the conduit of the geyser

r. Unusually violent eruptions

s. Both a and b.

t. Neither a nor b

6. Artesian wells:

u. Are always pure

v. Cannot be polluted because they are sealed

w. Always flow to the surface

x. None of the above

7. Center-pivot irrigation:

y. Has made it possible to farm soils that cannot be conventionally irrigate

z. Is causing the depletion of many aquifers

{. Is very distinctive seen from the air

|. All the above

8. Infiltration capacity is the:

}. rate at which a stream erodes

~. distance a stream flows from its source to the ocean

. maximum rate at which surface materials can absorb water

. vertical distance a stream can erode below sea level

. variation in flow velocity across a stream channel

9. Which of the following is an example of deposition by groundwater?

. karst topography

. caves

. stalactites

. caverns

. sinkholes

10. What percentage...