Planet Earth is actually a
A. huge magnet.
B. ball of cosmic rays.
C. magnetic organism.
D. none of the above
Answer: A
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How do existing nuclear power plants produce electricity?
A. Nuclear fission is used to heat water until it boils generating steam that spins a turbine. B. The blast from a nuclear bomb is used to turn wind turbines. C. Nuclear fission is used to melt salt that converts chemical energy to electricity. D. Nuclear fusion is used to heat water until it boils generating steam that spins a turbine.
Which of the following was not a result of the Industrial Revolution's impact on agriculture in Europe?
A. concentration B. abandonment C. intensification D. specialization
What causes a decrease in oxygen levels beyond the sunlit layer?
A) The respiration from marine animals and bacteria B) The by-products of photosynthesis C) There are fewer animals present D) None of these choices
Poverty encourages ________
A) high population growth rates B) low birth rates C) low fertility rates D) low population growth rates E) low death rates