Very cold air is usually associated with

a. low density.
b. cyclones.
c. high humidity.
d. high pressure.


d. High pressure

Environmental & Atmospheric Sciences

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The explosive eruption of Mount St. Helens in 1980 generated a large amount of pyroclastic

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A) Atlantic Ocean B) Indian Ocean C) Arctic Ocean D) Pacific Ocean

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Which of the following terms refers to a second surge of electrons that proceeds from the base of a cloud toward the ground during cloud-to-ground lightning?

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What disease is diagnosed by monitoring amylase activity?

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