AnswersVA-Ecology -CRPR 26-27 MC S1A History of Global Climate Change

A History of Global Climate Change Answers

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1
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Greenhouse gases are essential to support life on earth.

A
T
B
F
2
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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
3

During ices ages our planet supports more glaciers and deserts than forests.

A
T
B
F
4

Africa was covered by glaciers during the Pleistocene ice age.

A
T
B
F
5

“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.
6

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

A
T
B
F
7

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

A
burning fossil fuels
B
deforestation
C
respiration
D
population growth
8

Which of the following is not a theory supporting global warming?

A
It is predicted that the average temperature will rise 1.4° C or more over the next 100 years.
B
Human activity has increased greenhouse gases.
C
Over the last 100 years the earth has warmed by 0.74° C
D
Carbon dioxide is an insignificant greenhouse gas.
9

Human activities _______.

A
exacerbate the natural greenhouse effect
B
create the greenhouse effect
C
diminish the greenhouse effect
D
eliminate the greenhouse effect
10

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.

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