AnswersEnvironmental Science Q3Topic Test

Topic Test Answers

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1
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Which of the following is a way that humans impact rivers and streams?

A
pollution
B
dams
C
flooding
D
all of the above
2
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Which of the following is not a true statement regarding lakes?

A
Lakes are fed by rivers.
B
Lakes have waves.
C
Lakes are found in mountainous regions.
D
Lakes are smaller and more shallow than ponds.
3

Due to decreased light penetration, which area of rivers and streams will have less diversity of plant life?

A
the source
B
the mouth
C
the middle portion
D
none of the above
4

An increase in the number of phytoplankton in an aquatic ecosystem is always beneficial.

A
T
B
F
5

What characteristic is important for plants found in saltwater wetlands?

A
tolerance to high temperatures
B
tolerance to salinity
C
a range of climate zones
D
all of the above
6

Which of the following factors is least influential in affecting the biodiversity of wetlands?

A
type of wetland
B
food abundance
C
high levels of nutrients
D
water abundance
7

Eutrophication is caused by _______.

A
an increase in nutrients
B
a decrease in nutrients
C
the introduction of new species of animals
D
the introduction of new species of plants
8

The effects of agriculture and industry can be more harmful with the further loss of wetlands.

A
T
B
F
9

Which of the following is not a characteristic of rivers and streams?

A
vary in size
B
mainly saltwater
C
part of the water cycle
D
flow toward other bodies of water
10

Location plays a role in wetland type, but is not the sole determining factor.

A
T
B
F
11

Fish that feed on sediment will most likely be found in _______ rivers.

A
shallow
B
narrow
C
deep
D
fast-moving
12

Riparian zones can reduce the impact of water pollution.

A
T
B
F
13

Which of the following is not characteristic of marshes?

A
shallow water
B
frequent floods
C
acidic groundwater
D
herbaceous plants
14

Which area of rivers and streams will most likely contain the most sediment?

A
the source
B
the mouth
C
the middle portion
D
none of the above
15

What characteristic sets streams and rivers apart?

A
water quality
B
direction of flow
C
size
D
biodiversity
16

How are littoral and riparian zones different?

A
Littoral zones contain vegetation, while riparian zones do not.
B
Littoral zones have greater access to sunlight than riparian zones.
C
Riparian zones are more important to aquatic animals than littoral zones.
D
Riparian zones occur where water meets land, while littoral zones occur at depths of less than 15 feet.
17

The abundance and variety of foods available in wetlands is a large contributor to their biodiversity.

A
T
B
F
18

Rivers are more important to the water cycle than streams.

A
T
B
F
19

Which of the following best describes how levees impact wetlands?

A
Levees protect wetlands from destructive river floods.
B
Levees promote healthy wetland formation.
C
Levees prevent rivers from adding their sediment to wetlands.
D
None of the above.
20

Which of the following is not a way in which wetlands filter water?

A
nutrient absorption
B
oil absorption
C
sediment trapping
D
bacterial absorption

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