Earth Science Index Cards 3.2

etallic substance composed of two or more elements, as either a compound or a solution.

A set of seventeen metallic elements.

Process of extracting useful minerals from the surface of the Earth, including the seas.

The naturally occurring material from which a mineral or minerals of economic value can be extracted.

Any recovery operation by which waste materials are reprocessed into products, materials or substances whether for the original or other purposes

The combined process by which adverse environmental effects of surface mining are minimized and mined lands are returned to a beneficial end use.

You are the best, you work hard everyday to keep us entertained, in line, and help us learn. So please keep doing what you do best!