The maritime tropical Pacific (mT) and maritime tropical Gulf and Atlantic (mT) air masses are
A) different from one another because the Pacific air mass usually has lower specific humidity than the Gulf/Atlantic air mass.
B) both usually extremely unstable.
C) very different because the Pacific air mass is very unstable and the Gulf/Atlantic air mass is usually stable.
D) both less active during summer months.
A
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Lions are
A) producers. B) primary consumers. C) secondary consumers. D) decomposers.
Which of the following statements about Earth of 56 million years ago is correct?
A) Climate change was triggered by a huge release of volcanic ash. B) It was marked by the extinction of many marine species. C) Ocean surface waters were enriched in dissolved oxygen. D) The climate was much colder than it is today. E) There was a decrease in ocean temperatures.
Scarp formation is often associated with
A. creep. B. rockfalls. C. slumps. D. rockslides.
The process of shifting loose particles by blowing them into the air or rolling them on the ground is called ________
A) deflation B) aggradation C) the fluvial process D) the arid cycle E) sand motion