The hydrologic cycle is considered a(n) ________ system
A) open
B) infinite
C) collapsing
D) blue-colored
E) closed
Answer: E
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North America is about 80% urbanized. This mean that 80% of North American
A) cities contain 1 million or more people. B) people live in cities. C) territory is covered with urban structures like streets and commercial buildings. D) resources are used in cities. E) places are cities.
Sensible heat:
A) travels by convection through the laminar boundary layer. B) is released or absorbed when a substance undergoes a phase change. C) is dependent upon the specific heat of the substance involved. D) does not involve changes in temperature.
The greatest threat to global biodiversity is ________
A) habitat destruction B) chemical pollution C) overconsumption of rice, corn, and wheat D) the introduction of alien species
Which of the following statements regarding pH is true?
A) A pH of 10 is acidic, and a pH of 3 is alkaline. B) As a whole, the pH of the ocean is slightly acidic. C) Buffers accelerate large changes in the pH of a solution. D) pH will change in deeper water when organisms with calcite shells sink. E) pH relates to relative acid-base ion balance in a solution.