Exam 18: Global Climate

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Changes in the composition of the atmosphere that cause the Earth's climate to change are one example of a(n)____________________ cause of climate change.

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external

The ____________________ ratios of calcium carbonate shells have provided information about the sequence of glacier advances.

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oxygen isotope,oxygen isotopic

Climate models estimate that average global sea level will rise by an additional ____ or more by the end of this century.

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C

Why might geoengineering proposals pose complex political, financial, and technological challenges?

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When an oceanic plate encounters a lighter continental plate, it responds by ____.

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Changes in the circulation patterns of the ocean and atmosphere, which redistributes energy within the climate system, is an example of an external cause of climate change.

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Sunspots occur in cycles, with the number and size reaching a maximum approximately every ____ years.

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Because of precession, 11,000 years from now, seasonal variations in the Northern Hemisphere should be ____ at present, and seasonal variations in the Southern Hemisphere should be ____ at present.

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Why did periods of glacial advance in higher latitudes of the Northern Hemisphere tend to occur with cooler summers, but not necessarily with cooler winters?

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As oceans cool, they remove more CO2 from the atmosphere.

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The slow shifting of the continents and the ocean floors is explained by the ____.

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Describe how the climate of the Northern Hemisphere impacted Europe from the eleventh through the nineteenth centuries.

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Climate scientists believe that most of the recent global warming is due to increasing levels of ____________________.

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Volcanoes that have the most impact on global climate seem to be those rich in ____.

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The Viking colony in Greenland perished during the ____.

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If Earth were in a warming trend, which of the processes below would most likely act as a negative feedback mechanism?

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According to the 2013 Fifth Assessment Report of the IPCC, the primary source of the increased atmospheric concentration of carbon dioxide since the preindustrial period results from ____________________ use, with land-use change providing another significant but smaller contribution.

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Considering the Northern Hemisphere, describe the global warming trend seen since the late 1970s, including 2014 through 2016.

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____ may be the most important weather element in terms of the impact on humans.

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The atmospheric concentrations of which of the following greenhouse gases has been decreasing since the mid-1990s?

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