To be completely beyond Earth's gravity, you must travel to a region
A. beyond the solar system.
B. above the Earth's atmosphere.
C. well beyond the Moon.
D. Forget it; you can't travel far enough.
Answer: D
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What property of an electron makes it possible to use electron microscopes?
A. They are electrically charged. B. They have shorter wavelengths than visible light. C. They can be generated with electricity. D. They can be focused using smaller lenses. E. none of the above
Food in the intertidal zone is: a. abundant and accessible, and there are many animals to take advantage of it
b. none of these choices. c. abundant and inaccessible. d. not particularly abundant.
What happens at each stage of the commodity chain?
A) The commodity is transformed and value is added. B) Workers who produce the commodity are treated unfairly. C) The commodity is in danger of contamination. D) Producers make money. E) The government collects a tax of some sort.
The El Nino begins to weaken and eventually terminates when
A. cold water spreads out away from the equator, bringing warm upwelling waters from depth. B. the leading edge of the cold Kelvin wave finally reaches the eastern coast of South America. C. cold water converges on the equator, bringing cold upwelling waters from depth. D. warm water spreads out away from the equator, bringing cold upwelling waters from depth.