Week 10 Test Answers

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1
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The main difference between stream pools and ponds is that stream pools _______.

A
have an observable current
B
are located inland
C
have no access to rivers or streams
D
are usually larger than ponds
2
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Littoral zones are more likely to contain vegetation than riparian zones.

A
T
B
F
3

Aquifers are _______.

A
located below the water table
B
important sources of freshwater
C
located in the saturated zone
D
all of the above
4

Groundwater overdraft occurs when _______.

A
the location of the water table changes due to season
B
aquifers become polluted
C
the rate of use exceeds the rate of replenishment
D
trees are planted
5

Australian aborigines could not use wells in the desert due to lack of groundwater.

A
T
B
F
6

Eutrophication disrupts the balance of ecosystems.

A
T
B
F
7

Insects are most likely found in which aquatic zone?

A
pelagic
B
littoral
C
benthic
D
all of the above
8

Which statement explains one way that lakes form?

A
Lava flows block a river.
B
Streams flow into shallow areas.
C
Groundwater feeds into low-lying areas.
D
Grassy wetlands get covered by a stream.
9

Which is most likely true about water in chemical systems?

A
Water dissolves nonpolar ionic compounds.
B
Water dissociates ionic compounds.
C
Water dissociates covalent molecules.
D
Water dissolves nonpolar covalent substances.
10

Which describes the polarity in a water molecule?

A
partial negative charge on the oxygen atom because its electrons are pulled toward the hydrogen atoms
B
partial negative charge on the oxygen atom because it pulls electrons from the hydrogen atoms
C
partial positive charge on the oxygen atom because it pulls electrons from the hydrogen atoms
D
partial positive charge on the oxygen atom because its electrons are pulled toward the hydrogen atoms
11

Eutrophication is often the result of _______.

A
increases in animal populations
B
lack of oxygen in the water
C
fertilizer runoff entering aquatic ecosystems
D
a decrease in phytoplankton populations
12

Explain the process of eutrophication.

Answer not available
13

Human use of groundwater has _______ over time.

A
increased
B
decreased
C
decreased and then increased
D
remained the same
14

Compare ponds, lakes, and stream pools.

Answer not available
15

Decomposition in pools, ponds, and lakes takes place mostly in the _______ zone.

A
pelagic
B
littoral
C
benthic
D
all of the above

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