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Magma=liquid or molten rock deep in the earth, Igneous Rock=Geology produced under conditions involving intense heat, as rocks of volcanic origin or rocks crystallized from molten magma. Sediment=the matter that settles to the bottom of a liquid; lees; dregs.Sedimentary Rock=Rock that has formed through the deposition and solidification of sediment, especially sediment transported by water (rivers, lakes, and oceans), ice (glaciers), and wind.Metamorphic Rock =Rock that was once one form of rock but has changed to another under the influence of heat, pressure, or some other agent without passing through a liquid phase.Melting=to become liquefied by warmth or heat, as ice, snow. Heat & Pressure=Heat is defined as any spthe destructive physical and chemical effects flow of energy from one object to another, caused by a difference in temperature between the objects. Weathering=the disintegration and decomposition of rocks and minerals by natural processes such as the action of frost or percolating ground water. Erosion=The group of natural processes, including weathering, dissolution, abrasion, corrosion, and transportation, by which material is worn away from the earth's surface. Deposition=The act of depositing, especially the laying down of matter by a natural process.
