1.
element that consists of these ore minerals: carnotite, uraninite
2.
a method that is often used to mine large quantities of near-surface ore.
3.
__ __ may form along coastlines from heavy minerals that wash down to the ocean in streams.
4.
__ mining methods are used when ore deposits are located close to earth's surface.
5.
minerals that have no commercial value.
6.
__ produce clay, gypsum, and talc.
7.
a naturally occurring inorganic solid that has composition, internal structure, and physical properties
8.
atoms of two or more elements chemically bonded together.
9.
__ __ consists of gold, silver, and copper.
10.
minerals that are valuable and economical to extract are known as __ __.
11.
conduct electricity, have shiny surfaces, are opaque.
12.
element that consists of these ore minerals: bornite, cuprite, chalcocite, and chalcopyrite
13.
__ are the main products of quarrying.
14.
__ solutions flow through cracks in rocks.
15.
often, two or more metals are combined to form __.
16.
__ mining is a more efficient way to remove coal from a subsurface seam.
17.
the __ is piled alongside the cut.
