Water's temperature at the bottom of Lake Tahoe, high in the Sierra Mountains in California, at this moment is
A. 4°C.
B. below 4°C.
C. above 4°C.
D. uncertain.
Answer: A
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One benefit of irrigating crops is that it ____.
A. increases surface water supply B. increases salinization C. increases groundwater supp D. prevents waterlogging E. boosts crop productivity on farms
The western U.S. climate is different from the western European climate because ________
A) the water along the coast of Europe is warmer than the water along the western coast of the U.S. B) the western U.S. has mountains near the coast and Europe does not C) the water along the western coast of the U.S. is warmer than the water along the coast of Europe D) the winds that dominate the weather in the U.S. come from the west but in Europe they come from the southeast E) the U.S. is significantly closer to the equator than Europe
Which of the following is not a baleen whale?
A) Blue whales B) Fin whales C) Gray whales D) Right whales E) Sperm whales
Some city water treatment facilities combine storm water and sanitary sewage systems
During heavy storms, these treatment facilities may be overwhelmed with water, and untreated storm water mixes with sewage and flows directly back into the streams and rivers, where treated water usually returns. What might be the best way to address this problem? A) Not collecting rainwater in storm sewers and let it just accumulate on the roads B) Collecting and treating storm sewer and sanitary sewage systems separately C) Draining the sewage system onto a field near the stream or river D) Using the excess sewer water as a source of water for the city