In its path from the top of the atmosphere to the surface of the earth, radiation undergoes which of the following?
A) refraction
B) reflection
C) scattering
D) all of these
Answer: D
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According to statistics compiled by the World Bank, just over ________ of the world's population today lives in urban areas
A) 25% B) 50% C) 75% D) 100%
Which of the following statements gives the main reason that night-time radio broadcasts can be sent over long distances?
A. Radio waves propagate more efficiently through cooler, high-density air. B. Radio stations put out more power at night. C. The low D-level region of the ionosphere is weaker at night. D. There is less interference because many radio stations do not broadcast at night.
The Coriolis Effect turns
A) wind. B) ocean surface currents. C) wind and ocean surface currents. D) merry-go-rounds.
The addition of large amounts of bioavailable nitrogen and phosphorus to our streams, lakes, and coastal areas, is responsible for which of the following?
A) reduction in water levels B) lake size increases C) lake and stream eutrophication D) lake and stream magnetization E) increase in breast and prostate cancer in humans