If a scientist spends his time studying communities and the nonliving materials that they interact with, he or she would be considered a(n) __________.
Fill in the blank(s) with the appropriate word(s).
Answer: ecosystem ecologist
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Raindrops fall to the ground when:
A) they are at least five times the size of a cloud droplet. B) they reach a large enough terminal velocity for both their size and the distance between them and the ground. C) they are able to catch a fast-moving downdraft. D) the coalescence rate exceeds that of the collision rate.
The two principle climate components are
A) temperature and pressure. B) temperature and precipitation. C) precipitation and pressure. D) pressure and wind speed.
Only ________ of the Sun's energy reaches the Earth
A) 2 billionths B) 1 billionth C) 2 millionths D) 1 millionth E) 1 trillionth
Which of the following is a goal of urban transportation planning?
A. to provide transportation for handicapped and poor B. to conserve energy C. to reduce urban pollution D. All of these statements are correct