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Published byMaryann Hill Modified over 8 years ago
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Rocks!!!! Page 19 & 21 of INB
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EQ: How do the different types of rocks form?
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ROCKS A rock is a naturally occurring solid mixture composed of minerals, smaller rock fragments, organic matter, or glass.rock The individual particles in rocks are called grains.grains Igneous, Metamorphic, Sedimentary.
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Igneous As magma or lava cools, mineral crystals form and become the grains Molten rock is called magma when it is inside Earth.magma forms granite Course grained rocks, large crystals
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Molten rock that erupts onto Earth’s surface is called lavalava forms basalt. Fine grained, small crystals
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Sedimentary rocks Rock and mineral fragments that are loose or suspended in water are called sediment. sediment Usually sediment is formed through weathering by water, ice, or wind. It is eventually deposited in low areas called basins.
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Sediment is the source material for sedimentary rocks. Sedimentary rock forms from sediment that has been compacted and cemented together. Lithification is the process through which sediment turns into rock. Lithification
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Metamorphic Metamorphic rocks form when parent rocks are squeezed, heated, or exposed to hot fluids. The textures of most metamorphic rocks result from increases in temperature and pressure.
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Minerals with flat shapes, such as mica, have a texture called foliation. Foliation results when uneven pressures cause flat minerals to line up, giving the rock a layered appearance. Foliation
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