The Mohorovi?i? discontinuity ____

a. marks the boundary between Earth's crust and mantle
b. has been reached by drilling in the Gulf of Mexico
c. indicates a change in rock type from basalt to granite
d. indicates a change in rock type from igneous to sedimentary


a

Environmental & Atmospheric Sciences

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All of the following human activities will increase the sediment load in a river except

A) logging of forests on steep slopes. B) converting cropland to natural vegetation. C) surface mining for coal. D) large-scale construction projects.

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System reliability is determined by

A. degree of control. B. technological reliability and human reliability C. toxicology. D. catastrophe. E. acceptance of risk.

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The world's largest bauxite deposits, in northern Australia, form in ancient ________ soils

A) forest B) rainforest C) grassland D) desert E) wetland

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Trees that keep their leaves through the winter and a ground covered with shed needlelike leaves characterize

A. chaparral. B. tropical forests. C. coniferous forests. D. temperate forests.

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