Which of the following is the fastest form of mass movement?
A. earth flow
B. debris flow
C. soil creep
D. rockfall
Answer: D
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Most of the water in the hydrosphere is found in
A. aquifers. B. the polar ice caps. C. the atmosphere. D. the oceans.
According to recent EPA studies, 70% of pesticide poisonings in humans come from
A) heavy metals such as arsenic and lead. B) persistent chemicals like DDT. C) non-persistent organophosphates. D) eating meat tainted with persistent pesticides.
The current generation of ethanol as a biofuel requires
A) sugars and the process of fermentation. B) any plant material and the process of fermentation. C) manure, water, and aerobic bacteria. D) bioengineered bacteria and any form of cellulose.
Groundwater begins as
A) soil moisture. B) outgas materials from Earth's crust. C) surplus water that percolates downward below the surface. D) lakes that are slowly buried by impermeable materials. E) stream discharge.