The ultimate source of geothermal energy is
A) the sun
B) heat generated in the Earth's interior
C) hydroelectric
D) deeply buried biomass
B
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One of the most serious consequences of long-term irrigation is
A) desertification. B) soil salinization. C) virgin soil epidemics. D) deforestation.
Volcanoes and earthquakes along the Mid-Atlantic Ridge are ____.?
a. ?rare, but create catastrophic damage to island chains b. ?rare, and do not threaten populations c. ?common, and cause moderate coastal damage from storm surge d. ?rare, but cause catastrophic coastal damage from tsunamis e. ?common, and do not threaten populations
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
Scientists are now able to produce desirable traits in some organisms by adding, deleting, or changing segments of its DNA. This process is known as ____.
A. genetic modification B. genetic engineering C. genetic drift D. mutation E. speciation