Caves usually form in
A) topsoil.
B) subsoil.
C) underground regions that contain little groundwater.
D) the saturated zone beneath the water table.
C
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All the organisms and their physical and chemical environment within a specific area best describe ________
A) ecosystems B) biomes C) ecological communities D) populations E) the biosphere
Which of the following best describes the major advantages of generating electricity with nuclear power plants?
A. there is an infinite supply of uranium and is easier to connect to the electrical grid. B. generates electricity on a large scale and does not emit carbon dioxide. C. generates electricity on a large scale and is easier to connect to the electrical grid. D. easier to connect to the electrical grid and does not emit carbon dioxide. E. there is an infinite supply of uranium and does not emit carbon dioxide.
Which fish species has been reduced by huge marine trawling operations?
Atlantic cod Beluga whales Walleye Sea trout
Liquefaction is
A. a quicksand-like condition arising in some wet soils during earthquakes. B. flooding caused by dam failure resulting from an earthquake. C. flooding caused by tsunamis. D. flooding of coastal areas due to tectonic subsidence.