The frequency of a wave is ________.
A. the time between successive waves
B. the amount of displacement of the medium through which the wave is passing
C. the number of waves passing a given point per unit time
D. the energy of the wave
Answer: C
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Ecological diversity is a measure of the number of
A. Different versions of the same gene in an ecological community B. Different kinds of organisms within a community or ecosystem C. Niches, trophic levels, and ecological processes of a biological community D. Sizes, colors, and shapes of organisms within an ecological community E. Different species in an ecosystem
Where on the map is the center of high pressure influencing ocean currents with a counterclockwise circulation?
A) A
B) B
C) C
D) D
A secondary rainbow
A) is always brighter than a primary rainbow. B) produces a color pattern that is the same as a primary rainbow. C) is more likely when the Sun is straight over head, or nearly so. D) requires that light be reflected twice within a raindrop. E) all of the above
What was the primary cause of the decline in oil prices in 2016 to only 1/4 of the prices in 2008?
A) the soil supply glut caused by fracking B) a typographical error in a Black Friday sale ad C) the war against ISIS D) a prolonged peace in the Middle East E) energy conservation and the use of renewable technologies