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Published byMaximillian Matthews Modified over 9 years ago
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Rock Cycle Unit Vocabulary 7 th Grade Science
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Weathering The breaking down of Earth’s materials by natural processes (water, wind, ice, chemicals, etc.) into smaller pieces or sediments
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Erosion Weathered rock and soil particles are moved from place to place by water, wind, or ice
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Deposition Weathered sediments are laid down in a new location helping create new landforms or rocks
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Melting Caused by heat and pressure around the rock to form magma
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Solidification Magma or lava cools and hardens
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Recrystallization Through heat and pressure, the rock’s atoms and crystals are rearranged
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Igneous Rock Formed from the cooling and solidification of magma or lava 2 Types –Extrusive Igneous Rock –Intrusive Igneous Rock
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Extrusive Igneous Rock Formed above ground from lava cooling and hardening Characteristics from Cooling Quickly –Small or no crystals –Fine-grained texture
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Intrusive Igneous Rock Formed below ground from magma cooling and hardening Characteristics from Cooling Slowly –Large or small crystals –Coarse-grained texture
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Sedimentary Rock Formed from sediments (rock fragments, mineral grains, animal or plant remains) that are pressed or cemented together 3 Types –Clastic Sedimentary Rock –Organic Sedimentary Rock –Chemical Sedimentary Rock
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Law of Superposition States that layers and fossils on top are younger than lower layers Strata – horizontal layers formed from deposited sedimentary rock Stratification – process of arranging sedimentary rocks into layers
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Oldest Rocks Here ! Youngest Rocks Here ! Volcano Roots here!
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Metamorphic Rock Rock changes due to intense heat and high pressure then recrystallizes –Not heated enough to melt the rock 2 Types –Foliated Metamorphic Rock –Non-Foliated Metamorphic Rock
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Bands ( CAN ) Form = Foliated Metamorphic means “changed”
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The Rock Cycle
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