Unit 18 Review Questions

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. When did humans first begin to have a major impact on climate change?

Around 200 A.D. at the height of the Roman Empire correct incorrect

Around 1500 A.D. as colonial expansion began correct incorrect

In the mid-1700s at the beginning of the Industrial Revolution correct incorrect

In the mid-twentieth century with a major expansion of global population correct incorrect

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. On a time scale of billions of years, which of the following best describes Earth's climate?

Ice-house climate correct incorrect

Hot-house climate correct incorrect

Snowball Earth correct incorrect

Glacial/interglacial climate correct incorrect

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. What drives glacial/interglacial cycles?

Volcanic outgassing of carbon dioxide correct incorrect

Fluctuations in the Sun's output of solar radiation correct incorrect

Milankovitch cycles correct incorrect

Carbon dioxide-weathering feedback correct incorrect

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. Water molecules containing O-18:

move faster at the same temperature than do water molecules containing O-16 correct incorrect

are found almost exclusively in the ocean correct incorrect

evaporate at a slightly lower rate than water molecules containing O-16 correct incorrect

were present in the first billion years of Earth's history, but are now rare correct incorrect

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. Carbon dioxide-weathering feedback leads to warmer temperatures when:

chemical weathering increases correct incorrect

precipitation decreases correct incorrect

continents shift toward the poles correct incorrect

incoming solar radiation decreases correct incorrect

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. Ice-albedo feedback:

amplifies warming only correct incorrect

amplifies cooling only correct incorrect

amplifies both warming and cooling correct incorrect

suppresses warming and amplifies cooling correct incorrect

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. Regarding climate change, negative feedback:

amplifies the initial change correct incorrect

is quite rare compared to positive feedback correct incorrect

leads to a progressively cooler climate correct incorrect

has a stabilizing effect on climate correct incorrect

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. The Little Ice Age:

brought temperatures that were lower than the previous glacial maximum correct incorrect

led Vikings to move to Greenland correct incorrect

began around 1100 A.D. correct incorrect

was global in scope correct incorrect

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. Snowball Earth:

has its effects reduced through ice-albedo feedback correct incorrect

occurs about every 100 million years correct incorrect

amplifies carbon dioxide-weathering feedback correct incorrect

is evidenced by glacial deposits at tropical latitudes correct incorrect

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. Why is the carbon dioxide-weathering feedback not a good solution for human-induced global warming?

It occurs on too slow a time scale. correct incorrect

The continents are not well positioned for high rates of chemical weathering. correct incorrect

Carbon dioxide-weathering feedback is only effective to stop cooling. correct incorrect

The oceans now have a greatly reduced capacity to absorb carbon dioxide. correct incorrect