The pH of the ocean has decreased by 0.1 pH units.
Answer the following statement true (T) or false (F)
True
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Which of the following is NOT true of lands near the North and South poles?
A) they are perpetually covered with ice or the ground is permanently frozen B) The polar regions are unsuitable for planting crops C) few animals can survive the extreme cold D) few human beings live there E) there is not enough light to make survival possible
A forecast of an extended period of dry weather would be made for a region beneath
a. ?an upper-level trough. b. ?the polar jet stream. c. ?a cold pool of air aloft. d. ?an upper-level ridge. e. ?a shortwave trough.
Water in the upper part of the saturated zone tends to move downward following the slope of the water table.
Answer the following statement true (T) or false (F)
According to plate-tectonic theory, plates of rigid, elastic ________ move over a weak plastic layer below.
A. mantle B. lithosphere C. asthenosphere D. core