Which one of the following is the MOST abundant gas in the atmosphere?
A) nitrogen
B) carbon dioxide
C) oxygen
D) hydrogen
E) argon
A
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The Virgin Lands Campaign affected this republic the most
A. Moldova B. Latvia C. Kazakhstan D. Tajikistan
The cyanobacteria were
A) chemoautotrophs. B) responsible for introducing substantial amounts of oxygen into Earth's atmosphere. C) the earliest known prokaryotes. D) a group of heterotrophic bacteria.
Which of the following is true for fossil fuels?
A. Coal was formed in ancient oceans. B. Oil is formed from plant material. C. Oil and natural gas were formed by the same processes. D. None of these statements are correct.
Which device is least likely to waste large amounts of energy and money when used?
A. incandescent light bulbs B. internal combustion engine C. nuclear power plants D. coal-fired power plants E. mass transit