1. Rock Cycle Unit Vocabulary 7 th 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. Oldest Rocks Here ! Youngest Rocks Here ! Volcano Roots 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”

17. The Rock Cycle