1 A) granite, basalt B) basalt, granite C) granite, rhyolite D) grabbo, basalt 2 A) often many times deeper than the mountain is high B) always as deep as the mountain is high C) always the same depth as the mountain is high D) often shallower than the mountain is high 3 A) 0 km to 1 km above sea level and 4 km to 5 km below sea level B) 1 km to 4 km above sea level C) 4 km to 5 km above sea level and 0 km to 1 km below sea level D) 4 km to 5 km above sea level 4 A) Continental crust floats on top of oceanic crust. B) mantle material upwelling around crustal material because of gravity C) equilibrium that has been established between continental and oceanic crust D) Continental and oceanic crust displace the mantle, so they are in equilibrium. 5 A) the process of mountains eroding to flat ground B) when oceanic crust rises above continental crust C) how the mantle keeps mountains upright D) when the crust rises as it loses overlying material and mass 6 A) If erosion removes mass from the mountains, the roots will keep the continental crust at the same elevation. B) The roots provide buoyancy to support the large mass of the mountains. C) Mountains are less dense than their roots. D) The roots of mountains keep the mountains in one geographic location. 7 A) Continental crust is less dense than the mantle. B) Continental crust is thinner and less dense. C) Oceanic crust is under continental crust. D) Continental crust is thicker and is less dense. 8 <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0078664233/184123/154_usmap_ls_202c.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"> (22.0K)</a>]]> A) in the center of the country B) in the south, along the Florida coast C) in the western states D) in the northeastern states
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