The most important process of cloud formation in the atmosphere is ________.
cooling by compression of air
cooling by release of latent heat and vaporization
cooling by expansion of air
radiation cooling
cooling by expansion of air
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A polar jet is a belt of winds about 600 miles wide, flowing as fast as ________ in its central "core."
A. 400 km/hr B. 4 km/hr C. 40 km/hr D. 4,000 km/hr E. half of the speed of light
An earthquake of magnitude 6 releases this much more energy than one of magnitude 5:
A. 100 times B. 10 times C. 30 times D. 20 times
Which two gases make up a combined total of 99% of clean, dry air in the homosphere?
A) carbon dioxide and water vapor B) nitrogen and oxygen C) oxygen and carbon dioxide D) nitrogen and argon
Which of the following lines of evidence did Alfred Wegener use to support the concept of drifting continents?
a) the distribution of species of fossils b) the way the shapes of the continents fit together like pieces of a jigsaw puzzle c) the composition of meteors from outer space d) the pattern of similar mountain belts on different continents e) evidence of glaciers in areas that are now tropical