Copper is a metal that is used for many purposes. it is mined from the earth using various methods. though the amount of copper in the earth's crust is very large, if the mining of copper continues, it will eventually run out. all but one method listed below will conserve the world copper supply. which method might actually increase copper mining? a) a plan to collect copper bound for landfills and recycling it instead b) the development of a cheaper and more efficient way to mine for copper c) development of a material that could serve as a substitute for copper wiring d) the use of other metals to replace the copper normally found in electric motors

Island arcs island arcs are long, curved chains of oceanic islands associated with seismic activity and mountain-building processes at certain plate boundaries. they occur where oceanic tectonic plates collide. along one side of these island arcs, there is usually a long, narrow deep-sea trench. at island arcs, the denser plate is subducted and is forced into the partially molten mantle under the less dense plate. the islands are composed of the extrusive igneous rocks basalt and andesite. the basalt originates most likely from the plastic mantle. the andesite originates most likely from the melting of parts of the descending plate and sediments that had accumulated on its surface. which list identifies minerals present in andesite from the greatest percentage by volume to the least percentage by volume?