Oceanic crust is primarily composed of ____________, a heavy dark colored rock composed mostly of oxygen,

silicon, magnesium, and iron. Fill in the blank(s) with the appropriate word(s).


basalt

Environmental & Atmospheric Sciences

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Within a lake, eutrophic conditions predominate in deep, open water

Indicate whether the statement is true or false

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South Asia is primarily a region of

A) mid-sized industrial towns B) major urban conurbations C) suburban enclaves D) pastoral nomadic encampments E) rural villages

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All of the following are conducive to the formation of tornadoes except

A) vertical wind shear. B) internal rotation and updrafts. C) mountains and other topographic barriers. D) tightening internal rotation.

Environmental & Atmospheric Sciences

Red tides are caused by dinoflagellates

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences