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Rocks and Minerals

natural resources a materials on Earth that is necessary or useful to people
rock a non-living material made of one or more minerals
humus bits of decayed plants and animals - add nutrients to soil
soil a mixture of minerals, weathered rocks, and other things
sediment tiny bits of weathered rock, shells, or sand
igneous rock a rock formed when magma or lava cools and hardens
metamorphic rock a rock is formed when other rocks change with heat and pressure
sedimentary rock rocks formed from layers of sediment cementing together
Moh's scale a scale used to tell how hard rocks or minerals are
topsoil the top layer of soil; the most humus
subsoil below the topsoil, has less humus
loam the best kind of soil for growing plants
clay soil the type of soil that holds the most water
Properties of Minerals color, streak, luster, hardness
the hardest mineral on Earth diamond
bedrock the bottom soil layer
roots hold plants in place and take in water
Created by: elise_kramer