High-energy waves of winter storms ________.
A. move sand from the beach out to bars
B. hold sand on the beach and keep the beach stable
C. move sand from bars onto the beach
D. build sand spits and tombolos
E. All of these are correct.
Answer: A
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The Pacific coast is commonly called a(n) ____
A) ?active margin B) ?passive margin C) ?margin that gradually transitions from a passive to an active margin D) ?margin that continually changes from being a passive margin to an active margin and then back to passive margin
In the past 40 years, pesticide use has tripled yet pests still cause extensive damage to crops. Why has this increased use of pesticides not been more effective?
A) The pesticides in use today are much less powerful due to government regulations. B) The pesticides available are no longer suited for the most common types of pests. C) Increases in ultraviolet radiation and global warming break down pesticides faster. D) The widespread use of pesticides has resulted in the evolution of pesticide resistant pests.
How has increased mobility changed the United States?
Our alternating days and nights are caused by:
a. Earth rotation. b. Earth revolution. c. both Earth rotation and Earth revolution. d. none of these