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Rock Cycle Unit Vocabulary 7 th Grade Science

Explore the essential vocabulary for 7th-grade Science unit on the Rock Cycle, including Weathering, Erosion, Deposition, Melting, Solidification, Recrystallization, Igneous, Sedimentary, and Metamorphic rocks. Learn about the Law of Superposition and how rocks transform through the rock cycle processes.

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Rock Cycle Unit Vocabulary 7 th Grade Science

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  1. Rock Cycle UnitVocabulary7th Grade Science

  2. Weathering • The breaking down of Earth’s materials by natural processes (water, wind, ice, chemicals, etc.) into smaller pieces or sediments

  3. Erosion • Weathered rock and soil particles are moved from place to place by water, wind, or ice

  4. Deposition • Weathered sediments are laid down in a new location helping create new landforms or rocks

  5. Melting • Caused by heat and pressure around the rock to form magma

  6. Solidification • Magma or lava cools and hardens

  7. Recrystallization • Through heat and pressure, the rock’s atoms and crystals are rearranged

  8. Igneous Rock • Formed from the cooling and solidification of magma or lava • 2 Types • Extrusive Igneous Rock • Intrusive Igneous Rock

  9. Extrusive Igneous Rock • Formed above ground from lava cooling and hardening • Characteristics from Cooling Quickly • Small or no crystals • Fine-grained texture

  10. Intrusive Igneous Rock • Formed below ground from magma cooling and hardening • Characteristics from Cooling Slowly • Large or small crystals • Coarse-grained texture

  11. 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

  12. 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

  13. Youngest Rocks Here ! Volcano Roots here! Oldest Rocks Here !

  14. 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

  15. Bands (can) Form = Foliated Metamorphic means “changed” Metamorphic!

  16. The Rock Cycle

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