CAST Earth Science Vocabulary

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Across
  1. 1. a layer of gases that surrounds the Earth and interacts with the Earth's surface, climate, and life
  2. 4. a sedimentary deposit composed predominantly of carbon that is readily combustible
  3. 6. V-shaped depressions in the ocean that form when tectonic plates converge
  4. 12. a large, solid piece of Earth's crust that moves along with other tectonic plates
  5. 15. the process by which rocks are broken down at the Earth's surface through physical, chemical, or biological mechanisms
  6. 17. when two tectonic plates move apart, creating new crust
  7. 18. when two tectonic plates move toward each other and collide
  8. 20. vertical (or nearly vertical) fractures where the blocks have mostly moved horizontally
Down
  1. 2. process of deposition of a solid material from a state of suspension or solution in a fluid (usually air or water)
  2. 3. a large, solid slab of rock that makes up Earth's surface or crust
  3. 5. a process that occurs when the pH of a body of water or soil decreases
  4. 7. the mass movement of a material due to density differences caused by a variation in either composition or temperature
  5. 8. depressions in the Earth's surface that are caused by volcanic eruptions or meteorite impacts
  6. 9. fine sand, clay, or other material carried by running water and deposited as a sediment
  7. 10. a fracture or zone of fractures between two blocks of rock
  8. 11. fuel that occurs in geological formations such as shale, sandstone, coal beds, and other sedimentary rocks
  9. 13. a measure of the acidity or basicity of water which can be affected by the surrounding landscape
  10. 14. a natural resource that can be replenished by nature and is not depleted over time
  11. 16. a lowland area that forms when tectonic plates move apart
  12. 19. the geological process in which earthen materials are worn away and transported by natural forces such as wind or water