1 <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0078746361/561695/146_renewr_ca_250c.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (21.0K)</a>]]> A) A B) B C) C D) D 2 A) Nitrogen B) Water C) Methane D) Carbon dioxide 3 <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0078746361/561695/193_phsc_ls_250c.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (5.0K)</a>]]> A) rainwater is just pure water B) rainwater is the same pH as seawater C) rainwater is too acidic D) rainwater is too basic 4 A) fuel burning B) solar energy C) wind evaporation D) super saturation and precipitation 5 A) settling of crystals B) hydrothermal fluids C) chemical precipitation D) placer deposits 6 A) diamonds B) crystals C) aggregates D) ores 7 A) dams B) aquifers C) glacial lakes D) wells 8 A) burning fossil fuels B) photosynthetic plants C) volcanic eruptions D) burning forests 9 A) at least 50 years B) 10 months to one year C) 10 to 20 years D) 100 to 200 years 10 A) It has not always been a part of Earth’s atmosphere. B) It has been in Earth’s atmosphere for the past 4.6 billion years. C) It is released by volcanic eruptions in large quantities. D) It was used up by early life-forms during photosynthesis. 11 2 in the atmosphere can be reduced?A) limit forest clear cutting B) increase our use of fossil fuels C) add certain bacteria to the soil D) recycle carbon based materials 12 A) all renewable B) all nonrenewable C) the resources that the oceans provide D) the resources that Earth provides 13 A) acid precipitation B) smoke from forest fires C) carbon monoxide from engine exhaust D) dust from desertification 14 A) a natural resource that is dug out from underground B) a natural resource that can be mined at a profit C) any land resource D) any nonrenewable resource 15 A) cut back on overgrazing B) plant trees and shrubs C) keep topsoil covered with crops D) plow deeper into the soil 16 A) 25 B) 5 C) 125 D) 100 17 <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0078746361/561695/149_town_ca_258c.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (34.0K)</a>]]> A) gravel pit B) woods C) river D) highway 18 A) 2 percent B) 15 percent C) 30 percent D) 60 percent 19 A) recreational uses B) grazing for livestock C) mineral and energy uses D) distribution of housing communities 20 A) silver B) oil C) diamonds D) carbon
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