The coldest and driest winter air-mass in North America is the:
A) cT. B) cA. C) mT. D) mP. E) cP.
B
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If the gradual rise of deep water at temperate and tropical zones were to stop, the thermocline would
rise, making the difference in water layers steeper Indicate whether the statement is true or false.
Raindrops fall to the ground when:
A) they are at least five times the size of a cloud droplet. B) they reach a large enough terminal velocity for both their size and the distance between them and the ground. C) they are able to catch a fast-moving downdraft. D) the coalescence rate exceeds that of the collision rate.
Mineral species can be further subdivided into ________
A) mineral classes B) mineraloids C) evaporites D) varieties
The most common volcanic rock found in lava flows on composite volcanoes is
A. andesite. B. obsidian. C. basalt.