The original method of processing oil shale involved crushing the rock and then heating it. What environmental problem did this create that the new method (heating the rock in place) seeks to avoid?
A. carbon dioxide emissions
B. landslides
C. water pollution
D. acid rain
E. disposing of large volumes of waste rock
Answer: E
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The resistance of your skin is reduced when
A. tightened. B. wet. C. stretched. D. all of the above
The mature stage of air-mass thunderstorms
A) is marked by an absence of significant downdrafts. B) occurs before the anvil shape at the top of the cloud has formed. C) sees the end of additional water vapor entering the cloud. D) is marked by the heaviest precipitation.
The science is based on the assumption that the natural world behaves in an unpredictable manner.
Indicate whether the statement is true or false.
Which of the following is NOT true about alternative sources of energy?
A. Ethanol is mostly produced from corn and sugar cane, which can also be foods. B. Biomass energy can involve burning scrap wood and methane from landfills. C. Using solar energy requires a large investment in photovoltaic panels and other infrastructure. D. Fuel cells use oxygen and hydrogen as a fuel.