A decline of the productive potential of soil, especially on arid or semiarid land, by 10% or more because of prolonged drought and human activities is called ____.
A. salinization
B. desertification
C. soil erosion
D. overgrazing
E. waterlogging
Answer: B
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Discuss the use of fossils to determine the depositional environment of a sedimentary stratum. Give examples of some
fossils that imply a specific environment. Fill in the blank(s) with the appropriate word(s).
Society can reduce greenhouse gas emissions without major changes to our sources and consumption
of energy. Indicate whether the statement is true or false.
Weathering and erosion of the Acadian Highlands produced a clastic wedge known as the:a
Queenston Delta. b. Acadian Delta. c. Catskill Delta. d. Appalachian Delta. e. Mississippi Delta.
The thinning of the ozone layer over the Antarctic always occurs at the end of the Antarctic winter because
A. ozone is consumed by melting ice as winter transitions to summer. B. the Antarctic experiences its highest level of radiation during its winter. C. during their winter, residents of the southern hemisphere use more CFCs. D. UV from the sun is necessary to the creation of ozone from oxygen and the Antarctic receives no UV from the sun during its winter.