Unit 17 Review Questions

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. Which of the following climates has the lowest average annual temperature?

Dfd correct incorrect

Dfa correct incorrect

Dwb correct incorrect

Dfb correct incorrect

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. Permafrost:

has increased rapidly in geographic expanse in recent decades correct incorrect

is a permanently frozen layer of the subsoil correct incorrect

occurs in winter, but thaws by midsummer correct incorrect

is most common in humid continental climates correct incorrect

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. Acid precipitation:

can raise the pH of freshwater lakes correct incorrect

is more prevalent now than three decades ago correct incorrect

is caused primarily by the burning of fossil fuels correct incorrect

has had a strong impact in Europe, but only a negligible impact in North America correct incorrect

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. Precipitation in tundra climates:

occurs primarily in the warmer months correct incorrect

is sufficient for low pine forests to grow correct incorrect

typically exceeds 30 inches per year correct incorrect

is evenly spaced throughout the year correct incorrect

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. All of the following typically increase with elevation, EXCEPT:

precipitation correct incorrect

cloud cover correct incorrect

wind speed correct incorrect

temperature correct incorrect