igneous rock - rocks that form from cooling lava or magma, sedimentary rock - rocks that form under water from pressure and sediment, metamorphic rock - rocks that change from heat and pressure in the Earth, luster - how something shines, mineral - a pure non-living substance, rock - mixture of two or more minerals, cleavage - how a mineral breaks, streak test - a test to show the natural color of a mineral, scratch test - a test used to measure how hard a mineral is, Moh's Scale - determines the hardness of a mineral (1-10), magma - hot melted rock material beneath the Earth's surface, lava - magma that flows out onto Earth's surface, geologist - a scientist who studies Earth and rocks/minerals, diamond - the hardest known mineral, erosion - process by which rock, sand and soil are broken down and carried away, weathering - the breaking down of rocks and other materials on Earth's surface. They don't move, rock cycle - A series of processes on the surface and inside the Earth that slowly changes rocks from one kind to another, crystals - solid objects that have naturally occuring geometric forms, inner core - the center of Earth, outer core - the layer of Earth between the inner core and mantle, mantle - the layer of hot, solid material between the Earth's crust and the outer core., crust - the thin and solid outermost layer of the Earth above the mantle, obsidian - a type of igneous rock, sandstone - a type of sedimentary rock, marble - a type of metamorphic rock,

Rocks/Minerals

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