What caused holes in marble Roman columns 6 meters above sea level?
A) salt-water corrosion
B) physical weathering
C) clams
D) chemical weathering
Answer: C
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Two identical arrows, one twice as fast as the other, are fired into a bale of hay. The faster arrow penetrates the bale
A. more than four times as far as the slower arrow. B. twice as far as the slower arrow. C. four times as far as the slower arrow. D. the same distance as the slower arrow.
What is a nation-state?
A) a large group of people with shared sociocultural traits and a political identity with clear territorial boundaries B) a cultural group with shared sociocultural traits that poses a homeland within a larger country C) a country that has two or more states, for example, the U.S. D) a large cultural group with many different sociocultural traits and its own fully independent political territory E) a large cultural group that possesses a homeland within a larger country
Upwelling areas are more productive than oceanic areas because ________ in upwellings.
A. there are more nutrients B. organic matter is more concentrated C. food chains are shorter D. All of these are correct. E. None of these is correct.
Which of the following is true about the trade in animals and animal parts?
A) investors "bank" on extinction of elephants B) tigers are wanted for medicine C) Slow Loris is an endangered species D) CITES treaty bans ivory trade E) investors "bank" on extinction of elephants; tigers are wanted for medicine; Slow Loris is an endangered species