AnswersTX-Environmental SystemsUnit Test

Unit Test — Unit test Answers

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1
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During the entire month of June, temperatures increase in the Northern Hemisphere and decrease in the Southern Hemisphere.What causes these temperature changes?

A
The Sun reaches its lowest point in the sky.
B
The Sun reaches its highest point in the sky.
C
The north end of Earth’s axis is tilted toward the Sun.
D
The south end of Earth’s axis is tilted toward the Sun.
2
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Which statement describes the impact of ocean currents on climate?

A
Ocean currents create changes in the temperature of air over land masses.
B
Ocean currents cause the temperature of air over large bodies of water to change.
C
Ocean currents move cold water from the equator to the poles, creating cool weather regions.
D
Ocean currents carry warm water from the poles to the equator to create warm weather regions.
3

Acid rain occurs when sulfur dioxide in the atmosphere is oxidized in the presence of nitrogen dioxide. Acid rain is an example of _______.

A
a primary pollutant
B
a secondary pollutant
C
a tertiary pollutant
D
none of the above
4

Why was the concern over global cooling replaced with a concern over global warming?

A
The science community needed a cause to frighten the general population.
B
Steady surface temperature increases were noted between the 1970’s and 90’s.
C
Air pollution only became a concern in the 1980’s.
D
Scientists observed severe ocean acidification.
5

Which of the following is not true concerning the Pleistocene ice age?

A
Earth began warming out of the ice age 18,000 years ago.
B
Glaciers stopped advancing 15,000 years ago.
C
Sea levels during the ice age were higher than today.
D
Forests and grasslands became more common after the ice age.
6

Which of the following is the most likely cause for global climate change?

A
a decrease in the overall temperature of the Earth
B
an increase in the overall temperature of the Earth
C
an increase in the number of cold climates
D
no change to global climate
7

All scientists agree that global climate change will happen rapidly.

A
T
B
F
8

Which is one characteristic of deep ocean currents?

A
Deep ocean currents move quickly.
B
Deep ocean currents are caused by winds.
C
Deep ocean currents move cold water toward the equator.
D
Deep ocean currents are affected by temperature but not by salinity.
9

Which is one factor that adds to the greenhouse effect?

A
a decrease in the amount of dust in the atmosphere
B
a decrease in the amount of water on Earth’s surface
C
an increase in gases in the atmosphere that absorb heat
D
an increase in the amount of solar radiation that reflects into space
10

The increased ranges of plant and insect species resulting from climate change has only negative consequences.

A
T
B
F
11

Which action causes breakers?

A
Waves hit the shore at an angle and transport sand.
B
Water flows away from the shore and moves sand with it.
C
Underwater earthquakes cause motion throughout ocean water.
D
Waves meet the shore and cause the crest to spill over the trough.
12

What can happen to solar radiation when it enters Earth’s atmosphere?

A
It is increased as it hits the clouds.
B
It is absorbed or reflected as it travels to Earth’s surface.
C
It is changed into visible light.
D
It is destroyed by the water molecules in the atmosphere.
13

Alternative energy sources like solar and wind power _______.

A
are always available
B
are only replenished with human intervention
C
are renewable
D
are more versatile than fossil fuels
14

Ecosystems have trouble adjusting to short-term changes.

A
T
B
F
15

Air pollution affects everyone equally.

A
T
B
F
16

Driving cars lowers the pH of the oceans by _______.

A
releasing CO2 that dissolves and forms acid in the oceans
B
releasing pollutants that lead to smog
C
releasing CO that dissolves and forms acid in the oceans
D
releasing pollutants that lead to acid rain
17

Why does a coastal area have less variation in temperature than a noncoastal area?

A
Temperatures feel cool all year round due to the duration of daylight.
B
Temperatures change from warm to cool depending on the season.
C
The temperatures on land change more rapidly than temperatures on water.
D
The air is warm because warm water moves from the equator to the poles.
18

Which of the following is not a possible cause for air pollution?

A
volcanoes
B
industry
C
combustion
D
none of the above
19

The _______ is responsible for absorbing the most UV radiation.

A
troposphere
B
stratosphere
C
mesosphere
D
thermosphere
20

What occurs when the Northern Hemisphere experiences spring and the Southern Hemisphere experiences fall?

A
The Sun is directly overhead in the Northern Hemisphere.
B
The Southern Hemisphere receives more direct rays from the Sun.
C
The Northern and Southern Hemispheres get the same amount of energy from the Sun.
D
The Northern Hemisphere receives more daylight hours than the Southern Hemisphere.

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