Which of the following is not true of first generation stars?
A) They have violent, explosive deaths.
B) They are composed primarily of hydrogen.
C) They are massive.
D) They are short-lived.
E) They are very dense.
E
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What happens when water is withdrawn from an aquifer faster than it can be recharged?
A)The water table becomes lower. B)The water table remains stable. C)The water table rises. D)The lenses of salt water intrude on top of fresh groundwater. E)A drought occurs.
The lowest mean temperatures in the world occur in ____
A) Northwestern Europe B) the Arctic C) the Antarctic D) Northern Siberia
Most marine-protected areas ________
A) prohibit the installation of oil pipelines and fiber?optic cable lines within them B) are in the open oceans C) ban all fishing and extractive activities D) have been established without the consent of the United States E) are along the coastlines of developed nations
Sinkholes appear suddenly, and cannot be detected by precursor events
a. True b. False