A basin in which water leaves via evapotranspiration or subsurface gravitational flow instead of reaching the ocean is said to have
A) a disappearing stream.
B) sheetflow.
C) a closed system.
D) internal drainage.
D
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In a solution of 77% nitrogen and 23% oxygen, which is the solvent?
A. nitrogen B. oxygen C. both D. neither E. Gases cannot form solutions.
Why are igneous rocks that consist of very small crystals called aphanitic?
A) Aphanitic comes from the Greek word phaneros, meaning visible. B) Aphanitic comes from the Greek word aphaneros, meaning invisible. C) They form deep within the earth's crust. D) They form deep within the earth's ocean.
Considering the cost-effectiveness of pollution control over a 25-year period, the most expensive period of pollution control is from years
A) 0 to 5 while the least expensive is in years 20 to 25. B) 0 to 5 while the least expensive is in years 5 to 10. C) 20 to 25 while the least expensive is in years 0 to 5. D) 10 to 15 while the least expensive is in years 15 to 20.
The normal vertical temperature gradient (average lapse rate) is CLOSEST to how many degrees Celsius per 1,000 meters?
A) 1.5 B) 3.5 C) 6.5 D) 16.5 E) 32.5