AnswersSC332 Environmental Science BA History of Global Climate Change

A History of Global Climate Change — Unit test Answers

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1
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Africa was covered by glaciers during the Pleistocene ice age.

A
T
B
F
2
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“In a 2009 study, presented by the National Academy of Science, 97% of climate scientists agree that human activity is causing global warming." Which of the following statements is best supported by this study?

A
Most climate scientists dispute the theory of human influence on global warming.
B
Global warming is most likely alarmist propaganda based on false data.
C
Global warming is definitely not caused by human influence on nature.
D
Most climate scientists believe that there is evidence that explains global warming.
3

Human activities _______.

A
exacerbate the natural greenhouse effect
B
create the greenhouse effect
C
diminish the greenhouse effect
D
eliminate the greenhouse effect
4

Which of the following best explains why air pollution that was once blamed for global cooling is now considered responsible for global warming?

A
Pollution began reflecting sunlight and heat rather than absorbing it.
B
Evidence of global warming became overwhelming.
C
Scientists mistakenly thought pollution reflected sunlight and heat rather than absorbed it.
D
Congress required scientists to assign a cause to global climate change.
5

Between 1940 and 1970 most scientists were already concerned about global warming.

A
T
B
F
6

Greenhouse gases are essential to support life on earth.

A
T
B
F
7

Greenhouse gases are best described as _______.

A
the result of fossil fuel use
B
gases that cause the greenhouse effect
C
carbon dioxide and methane
D
gases that trap energy from the sun in Earth’s atmosphere
8

Which of the following is not a manmade cause of global warming?

A
burning fossil fuels
B
deforestation
C
respiration
D
population growth
9

“In a 2009 study, presented by the National Academy of Science, 97% of climate scientists agree that human activity is causing global warming." Which of the following statements is best supported by this study?

A
Most climate scientists dispute the theory of human influence on global warming.
B
Global warming is most likely alarmist propaganda based on false data.
C
Global warming is definitely not caused by human influence on nature.
D
Most climate scientists believe that there is evidence that explains global warming.
10

Greenhouse gases are best described as _______.

A
the result of fossil fuel use
B
gases that cause the greenhouse effect
C
carbon dioxide and methane
D
gases that trap energy from the sun in Earth’s atmosphere
11

Which of the following best explains why air pollution that was once blamed for global cooling is now considered responsible for global warming?

A
Pollution began reflecting sunlight and heat rather than absorbing it.
B
Evidence of global warming became overwhelming.
C
Scientists mistakenly thought pollution reflected sunlight and heat rather than absorbed it.
D
Congress required scientists to assign a cause to global climate change.
12

Which of the following best describes the impact of glaciers upon the surface of the earth?

A
Ice buried continents under a few hundred feet of ice.
B
Glaciers scraped across the surface and altered landscapes and the course of rivers.
C
The passage of glaciers created new ecosystems.
D
All of the above.
13

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.
14

Question is locked

Answer not available
15

Global warming is a theory accepted by a majority of scientists.

A
T
B
F
16

Greenhouse gases are essential to support life on earth.

A
T
B
F
17

Question is locked

Answer not available
18

Between 1940 and 1970 most scientists were already concerned about global warming.

A
T
B
F
19

Which of the following best describes the impact of glaciers upon the surface of the earth?

A
Ice buried continents under a few hundred feet of ice.
B
Glaciers scraped across the surface and altered landscapes and the course of rivers.
C
The passage of glaciers created new ecosystems.
D
All of the above.
20

Which of the following continents was not covered by ice during the Pleistocene ice age?

A
Europe
B
Asia
C
Australia
D
North America

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