A watershed is ___.
A. the water held in the atmosphere prior to returning to Earth in the form of rainfall
B. the area of land that drains into a river or lake
C. a river that drains into the sea
D. an inland basin that
B. the area of land that drains into a river or lake
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What data is used in computer models run by climate scientists, and what exactly do the models tell us?
What will be an ideal response?
Match the energy source with the correct description.?
A. ?solid fossil fuel formed from the remains of land plants B. ?can be refined into various fuels and other components with different boiling points C. ?a mixture of gases, of which 50-90% is methane D. ?liquid fuel produced from coal E. ?uranium-235 nuclei are split into light nuclei
The only form of commercial agriculture that is an extensive agricultural pursuit is
A) mixed crop and livestock farming. B) grain farming. C) cattle ranching. D) Mediterranean cropping. E) horticulture and fruit farming.
Although the polar regions radiate away more heat energy than they receive by insolation in the course of a year, they are prevented from becoming progressively colder each year by the
a. conduction of heat through the interior of Earth. b. concentration of Earth's magnetic field lines at the poles. c. circulation of heat by the atmosphere and oceans. d. the insulating properties of snow. e. release of latent heat to the atmosphere when polar ice melts.