A History of Global Climate Change Answers

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

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

The science community needed a cause to frighten the general population.

Steady surface temperature increases were noted between the 1970’s and 90’s.

Air pollution only became a concern in the 1980’s.

Scientists observed severe ocean acidification.

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

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

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

Pollution began reflecting sunlight and heat rather than absorbing it.

Evidence of global warming became overwhelming.

Scientists mistakenly thought pollution reflected sunlight and heat rather than absorbed it.

Congress required scientists to assign a cause to global climate change.

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

burning fossil fuels

deforestation

respiration

population growth

Human activities _______.

exacerbate the natural greenhouse effect

create the greenhouse effect

diminish the greenhouse effect

eliminate the greenhouse effect

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

It is predicted that the average temperature will rise 1.4° C or more over the next 100 years.

Human activity has increased greenhouse gases.

Over the last 100 years the earth has warmed by 0.74° C

Carbon dioxide is an insignificant greenhouse gas.

Greenhouse gases are essential to support life on earth.

Greenhouse gases are best described as _______.

the result of fossil fuel use

gases that cause the greenhouse effect

carbon dioxide and methane

gases that trap energy from the sun in Earth’s atmosphere

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