The high levels of atmospheric nitrogen are due primarily to the fact that:
A) the earth is constantly bombarded by small, house-sized comets.
B) nitrogen has a very long residence time.
C) nitrogen is the major component of the gas emitted from volcanoes.
D) nitrogen is produced by many species of bacteria.
Answer: B
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Judge the following sentence according to the criteria given below: Future offshore petroleum exploration will continue in the deeper waters of the continental margins BECAUSE offshore petroleum exploration has inevitable oil spills caused by
inadvertent leaks or blowouts during the drilling process. A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct, but the reason is incorrect. D) The assertion is incorrect, but the reason is correct. E) Both the assertion and the reason are incorrect.
Most of the world's human settlements are clustered
A. In wide arable plains B. Along coastlines and rivers C. In open valleys D. Between 30 and 50 degrees north latitude E. In mountainous regions
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What will be an ideal response?
Which of the following will be most impacted by President Obama's first climate change policy?
- coal-fired power plants - auto industry - ethanol industry - liquid propane companies