The circle of illumination divides Earth into two hemispheres known as:
a. east and west.
b. north and south.
c. day and night.
d. summer and winter.
C
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Photochemical oxidation reactions are driven by
A. Light, regardless of whether it is the sun or indoor light B. Solar energy C. Entropy D. The great instability of the reactants E. The heat of industrial activity
If air temperature near the surface increases, what will most likely happen?
A. Density will decrease, and pressure will decrease. B. Density will increase, and pressure will decrease. C. Density will decrease, and pressure will increase. D. Density will increase, and pressure will increase. E. Density and pressure will stay the same.
Which of the following is a "hard" shoreline protection measure?
A) jetties only B) groins only C) beach nourishment only D) both groins and jetties E) groins, jetties, beach nourishment
Drought is ________ while aridity is ________
A) temporary; permanent B) persistent; seasonal C) normal; unusual D) predictable; variable