Which of the following best describes what an aquifer is?
A) An underground area of permeable rock or sediment that is filled with water.
B) An aboveground lake that is fed by underground streams.
C) An underground river that generally flows through cave networks.
D) An underground water source that is superheated by volcanic activity producing plumes of steam aboveground.
A
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What is the main reason for the large ecological footprint associated with urban sprawl?
A. gasoline powered cars B. diesel powered public buses C. motorcycles D. bicycle use
The charitable organization Heifer International uses donations to provide people in developing nations with farm animals to help feed hungry families. Heifer International is therefore contributing to
A) the Green Revolution. B) subsistence farming. C) the Industrial Revolution. D) high-impact farming.
When will an area experience high tide?
A. when the moon is directly overhead or on the opposite side of Earth B. in the early afternoon when water temperatures are highest C. when there is a quarter moon in the sky D. during a period of intense sunspot activity
E.G. Ravenstein considered it a "law of migration" that longer distance migrations would gravitate away from centers of economic strength
Indicate whether the statement is true or false.