Shades of gray or green in iron-bearing rocks are caused by:

a. native iron
b. ferric iron
c. ferrous iron
d. oxidized iron


c

Environmental & Atmospheric Sciences

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The Enhanced Fujita scale classifies tornadoes according to the ____ of the tornado

a. wind direction b. rotational wind speed c. vertical wind speed d. diameter and height e. length of the path of damage

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How is biotechnology helping to reduce the environmental impacts of mining?

A) through efficient treatment of mine wastes and contaminated water B) plant uptake of precious metals permits mining of plants rather than rock C) through the use of plants that revegetate mine waste piles D) through better environmental regulations relating to mine waste

Environmental & Atmospheric Sciences

What do most scholars agree is the most significant component of globalization?

A) climate change B) political transition around the planet C) international terrorism D) cultural hybridization E) economic reorganization of the world

Environmental & Atmospheric Sciences