Which of the following is an igneous rock?
A. gneiss
B. salt
C. granite
D. limestone
Answer: C
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A stream channel has a cross-sectional area of 20 square meters (20 m2). The stream's velocity at that point is 4 meters per second (4 m/s). Calculate the stream's discharge.
A. 150 m3/s B. 15 m3/s C. 80 m3/s D. 40 m3/s
A cone of depression can form if
A. limestone caverns collapse. B. groundwater is overpumped from an aquifer. C. an artesian well goes dry.
A farmer decides he will wait until the number of crop-eating insects gets large enough to create economic damage before he takes action. When that occurs, he will first try natural biological controls. If that does not work, he will use less harmful biopesticides in small amounts to target specific species; and then only use synthetic chemicals if he has no other choice. What is this approach called?
A. Integrated pest management B. Conventional pest management C. Polyculture management D. Biodiversity management system
Which one of the following gases has the greatest effect on weather?
A) ozone B) water vapor C) oxygen D) argon E) nitrogen