What was the first orogeny to affect the Appalachian mobile belt?
a. Acadian
b. Taconic
c. Cordilleran
d. Alpine
e. Caledonian
b
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Which of the following is not a technique used for the desalination of salt water?
a. freezing b. distillation c. chemical precipitation d. reverse osmosis
Although clay has ________ porosity it does not make a good aquifer because it has ________ permeability
A) low, high B) low, low C) high, low D) high, high
How did the Greeks estimate the size of the earth?
A) They measured the angle of the sun above the horizon at midday in two places with different latitude and used the angle to estimate the circumference of the earth. B) They used the height of sailing ships as they sailed over the horizon to estimate curvature of the earth, which allowed estimation of the size of the earth. C) They didn't; everyone thought the world was flat until Columbus' time. D) They measured the altitude of mountains in Greece, then used the distance they were lost from sight to estimate the curvature of the earth, which allowed estimation of the size of the earth.
At low temperatures and very low rainfall:
a. moderate chemical and strong mechanical weathering will occur b. slight mechanical and moderate chemical weathering will occur c. moderate chemical and moderate mechanical weathering will occur d. slight to moderate mechanical weathering will occur