Why do volcanic eruptions cause cooling for the weeks/months following the eruption?

A) increased sulfur in the atmosphere reflect energy from the sun
B) volcanic ash acts as a shield to block the sun's energy from reaching earth
C) carbon dioxide is emitted during the eruption
D) both A and B


Answer: D

Environmental & Atmospheric Sciences

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-five -two -nine -six -eleven

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Cumulonimbus clouds indicate unstable atmospheric conditions. What stops the upward growth and causes the top of a cumulonimbus cloud to flatten out into an anvil??

What will be an ideal response?

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Haley's Comet visits Earth's atmosphere once every 76 years. What branch of the Earth sciences is the main group that studies these phenomena?

A) meteorology B) geology C) oceanography D) astronomy

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Hominins originated in ____

a. Africa b. Australia c. South America d. China e. North America

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