What is the most common way to name a geologic period?

A) by the name of the place where rocks of that period were first described
B) by the name of the tectonic continent that existed at that time
C) by the name of the scientist who first defined that period
D) by the name of the metamorphic processes that were occurring at that time


Answer: A

Environmental & Atmospheric Sciences

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Which of the above sections of this molecule would be considered an unsaturated portion of the molecule?

A. a B. b C. c D. a and b E. all of the above

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List two problems scientists encounter as they attempt to divide the Earth into climatic zones

What will be an ideal response?

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Which is an external cause of climate change? a. Changes in the composition of the atmosphere

b. Changes in the earth's surface. c. Changes in incoming solar radiation. d. All of these choices.

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A factor that can influence earth's temperature but not be influenced by humans

A. variations in solar radiance. B. surface albedo. C. aerosol concentration. D. atmospheric albedo.

Environmental & Atmospheric Sciences