How would the temperature of Earth differ if, on average, there were 50% more clouds?
A. Earth would be warmer
B. There would be no change in temperature
C. Earth would be cooler
Answer: C
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A sandstone is found to overlie a shale. The shale contains a volcanic ash layer that has been radiometrically dated to 84 million years ago. Both the shale and the sandstone are cut by a pluton of gabbro that has been dated to 60 million years old
How old is the sandstone layer? A) between 84 and 60 million years old B) older than 84 millions years old C) younger than 60 million years old D) more information is needed to constrain the age
In order to save the northern spotted owl, ________ was banned on much of the old-growth forest in the Pacific Northwest where the owl lives.
Fill in the blank(s) with the appropriate word(s).
Which of the following is true of antibodies?
A) An organism is born with its full complement of antibodies. B) A new antibody can appear whenever one is needed. C) The ability to produce new antibodies is determined by an organism's genetic blueprint. D) None of the above is correct.
Which one of the following is not true of glaciers?
A) originate on land B) exist only in the Northern Hemisphere C) form from the recrystallization of snow D) show evidence of past or present flow