What is the current population of the Earth?
A) over 7 million
B) 670 million
C) nearly 2 billion
D) over 7 billion
E) nearly 2 trillion
D
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Which of the following is not a greenhouse gas?
A. carbon dioxide B. methane C. water vapor D. nitrous oxide E. stratospheric ozone
What are some of the useful products humans obtain from volcanoes? What will be an ideal response?
An organism such as a fish whose body temperature is nearly the same as the environment is referred to as ________
A) homeothermic B) warm-blooded C) poikilothermic D) endothermic
During the spring, on a warm, sunny day in Boston, Massachusetts, the wind shifts from southwesterly to northeasterly and the weather turns cold, damp, and overcast. This suggests that a “back door” cold front approached Boston from the
a. southeast b. southwest c. northeast d. west e. northwest