The expansion of desert-like landscapes, generally as a result of human activities in marginal lands, is called _______________
Fill in the blank(s) with correct word
desertification
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Which of the following methods do scientists use to determine air temperature in the thermosphere?
A. use of radiosondes B. observation of changes in satellite orbits C. use of temperature probes in orbiting satellites D. direct measurement in manned, high-altitude balloons
The amount of water in pore spaces has no effect on mass movements of earth materials.
Answer the following statement true (T) or false (F)
What two factors speed up rates of chemical reaction and weathering in rocks and soils?
a. low temperatures; very moist b. low temperatures; very dry c. high temperatures; very dry d. warm temperatures; very moist
The phenomenon of waves changing direction as they approach the shoreline is known as ________
A) submergence B) eruption C) magic D) refraction E) carbonation