AnswersFL-2001340-Environmental Science Sem 1 CRCumulative Exam

Cumulative Exam — Cumulative exam Answers

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1
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A fish living in an environment cold enough to freeze the water in its body is not an extremophile.

A
T
B
F
2
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Freshwater biomes have _______.

A
organisms adjusted to high salinity
B
more diversity than marine biomes
C
a salinity of less than 1%
D
the ability to maintain their temperature year round
3

There are risks associated with drinking potable water.

A
T
B
F
4

Which of the following is a way that climate affects soil formation?

A
increased precipitation
B
warmer temperatures
C
increased winds
D
all of the above
5

Which of the following statements about large scale mineral extraction is true?

A
The economic benefits of large scale mineral extraction outweigh the environmental costs.
B
Large scale mineral extraction is more destructive than in the past.
C
Large scale extraction is vital to the economy of mining towns.
D
Mineral extraction cannot be done in ways that do not completely destroy the environment.
6

Land clearing and irrigation in Australia have only resulted in an increase in the amount of land available for use as farmland.

A
T
B
F
7

Continued deforestation will most likely lead to _______.

A
a decrease in the number of endangered species
B
an increase in the number of endangered species
C
an increase in the number of oil and chemical spills
D
a decrease in glacial melting
8

What characteristic is shared by both inceptisols and entisols, the soils of flood plains?

A
They both have well-developed soil horizons and profiles.
B
Both are young and only beginning to develop horizons and a soil profile.
C
They are both at the final stage of soil development.
D
None of the above
9

Buffer zones _______.

A
can help regulate the acidity of aquatic ecosystems
B
help increase erosion rates
C
are set up around natural resource areas
D
all of the above
10

Which of the following best explains why humans need constant supplies of fresh water?

A
Humans need a constant supply of water to provide them with essential vitamins.
B
Humans need a constant supply of water to maintain proper hygiene.
C
Constant supplies of freshwater are needed because body water is continually being lost.
D
Constant supplies of freshwater are not actually necessary for survival.
11

Areas with more rainfall will have the same rate of soil formation as areas with less rainfall.

A
T
B
F
12

Humus creates good soil tilth, which is an indirect benefit of microorganism action.

A
T
B
F
13

Why is phytoplankton located near the ocean’s surface?

A
It cannot live in areas of high salinity.
B
It can more easily evade predators on the oceans’s surface.
C
It needs access to oxygen only found at the ocean’s surface.
D
It needs sunlight to survive.
14

If predators A and B prey upon the same species and predator A is eliminated, the population of predator B will likely __________.

A
be eliminated
B
increase
C
decrease
D
remain the same
15

Fossil fuels are an important natural resource used by society. Which of the following best describes fossil fuels?

A
They are any liquid fuel derived from once-living matter.
B
They are organic fuels derived from ancient plants and animals.
C
They are fuels in which dinosaur fossils are commonly found.
D
They are naturally occurring inorganic fuels like coal and petroleum.
16

How is the heat generated by the reactor core of a nuclear power plant used to provide power to buildings?

A
It is used directly to heat homes and offices.
B
It generates steam, which turns a turbine, powering a generator.
C
It generates steam, which is then condensed back to water. This process produces energy.
D
All of the above
17

Which of the following best explains how human activities can directly contribute to landslides?

A
Removing plants from hillsides eliminates the root structures that anchor soil.
B
Clearing trees from hills increases the frequency of rainstorms.
C
Human activities tend to reduce the risk of fires.
D
Landslides are not impacted by human activities.
18

Which of the following statements about biodiversity is not true?

A
Changes to biodiversity never occur naturally.
B
Changes to biodiversity can lead to a decrease in ecosystem stability.
C
Changes to biodiversity can positively and negatively affect on an ecosystem.
D
Changes to biodiversity can lead to an increase in ecosystem stability.
19

Decomposers such as fungi break down the nutrients in dead plant and animal matter for use by _______.

A
producers
B
primary consumers
C
secondary consumers
D
tertiary consumers
20

Minerals are extracted from the Earth through various mining practices.

A
T
B
F

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