By the time water percolates down to the zone of saturation, it is mostly free of sediment

a. True
b. False
Indicate whether the statement is true or false


True

Environmental & Atmospheric Sciences

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a. saltation. b. abrasion. c. deflation. d. saltation and abrasion. e. abrasion and deflation

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Chlorofluorocarbons

A) have decreased in concentration in the atmosphere since the implementation of the Montreal Protocol. B) are a common component of volcanic gases. C) cause increased levels of harmful ozone in the stratosphere. D) typically stay in the atmosphere for approximately six months. E) are naturally occurring compounds.

Environmental & Atmospheric Sciences

Which of the following is a way in which water weakens earth materials?

A. absorption/adsorption B. weight of water C. ability to dissolve cement D. all of the choices are correct

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Limestone is formed primarily through ________

A) evaporation of calcite rich seawater B) biochemical sediments secreted by marine organisms C) chemical interactions between ocean bottom sediments and ions in sea water D) direct precipitation from seawater

Environmental & Atmospheric Sciences