Acid mine drainage:
a. is a problem in many of the coal-mining regions of the eastern U.S.
b. often raises the pH of local streams.
c. is primarily related to mining salt from the waters of the Great Lakes.
d. is a procedure developed to reduce chemical pollutants in streams.
e. is a procedure developed to raise stream temperature.
A
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With no air resistance, a projectile launched at 30° has the same range as if it were fired at
A. 70° B. 60° C. 30° D. 45°
Which is considered a physical factor?
a. Diffusion b. Dissolved nutrients c. Surface-to-volume ratio d. Active transport
Which of the following is generally NOT a typical practice in growing rice in Asia?
A) preparing and terracing fields with a plow drawn by oxen B) flooding the plowed field with water C) growing seedlings in a nursery D) transplanting seedlings into the flooded field E) machine harvesting and winnowing
The large thermally driven convection cell that is driven by convective "hot" towers along the equator is the?
a. ?Ferrel cell. b. ?Hadley cell. c. ?Ekman spiral. d. ?El Niño cell. e. ?Doldrum cell.