What kind of temperature condition can result in air pollution?
What will be an ideal response?
Answer: temperature inversion
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Populations of zooplankton can ________.
A. accumulate at water-layer density boundaries B. move toward the sea surface at night C. accumulate at water-layer density boundaries and reflect sound waves D. accumulate at water-layer density boundaries, move toward the sea surface at night, and reflect sound waves E. reflect sound waves
Of these four lakes, which ones are above the water table?
A. 1 and 2 B. 3 and 4 C. 1 and 4 D. 2 and 3 E. None of these.
Which continent has the greatest proportion of arid and semi-arid climates?
a. Africa b. South America c. Asia d. Australia
Which ocean's name comes from a word meaning peace?
A) The Pacific Ocean B) The Atlantic Ocean C) The Indian Ocean D) The Arctic Ocean E) The Antarctic Ocean