Unit 19 Review Questions

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. Which of the following is NOT evidence of global warming over the last century?

Global temperature trends from 1920 to 1940 correct incorrect

Changes in the number of extreme cold events correct incorrect

Movements of alpine glaciers correct incorrect

Changes in the number of frost days correct incorrect

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. Which of the following regions has seen the most warming, on average, over the last three decades?

Antarctica correct incorrect

Asia correct incorrect

South America correct incorrect

Indian Ocean correct incorrect

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. Scientific consensus holds that increased atmospheric carbon dioxide is due primarily to:

land clearing correct incorrect

outgassing from volcanoes correct incorrect

burning of fossil fuels correct incorrect

release from warming oceans correct incorrect

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. Which of the following is NOT a greenhouse gas?

Methane correct incorrect

Carbon dioxide correct incorrect

Oxygen correct incorrect

Nitrous oxide correct incorrect

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. What is the most convincing evidence suggesting greenhouse gases are responsible for much of the observed warming over the past century?

There is a correlation between increasing greenhouse gases and increasing temperatures. correct incorrect

There were no greenhouse gases in the atmosphere during past periods of extensive glaciation. correct incorrect

Average temperatures have risen the most over industrial areas with the highest emissions of greenhouse gases. correct incorrect

When greenhouse gas increases are removed from GCMs, global warming disappears. correct incorrect

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. General circulation models:

change only one forcing variable per model run correct incorrect

currently number about a half-dozen correct incorrect

by necessity must ignore basic physical laws of motion and state correct incorrect

are mostly in agreement about the causes of global warming correct incorrect

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. According to general circulation models, continued global warming will result in:

decreased cold-related deaths correct incorrect

increased energy demand for heating buildings correct incorrect

decreased soil erosion correct incorrect

lower sea levels correct incorrect