Geology

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Across
  1. 1. The upper layer of soil that is rich in organic matter
  2. 5. The wearing away and movement of soil and rock
  3. 6. The sudden shaking of Earth's surface
  4. 9. A sedimentary rock made from compacted sand
  5. 13. A crack in Earth's crust where rocks can move
  6. 14. A naturally occurring substance with a definite chemical composition
  7. 18. Related to volcanoes or volcanic activity
  8. 20. A metamorphic rock commonly formed from shale
  9. 22. The breakdown of rocks at Earth's surface
  10. 23. Molten rock that reaches Earth's surface
  11. 24. The thin outermost layer of Earth
  12. 25. A hot spring that periodically shoots water and steam
  13. 26. The rigid outer layer of Earth
  14. 29. A rock type formed when molten rock cools
  15. 30. An opening in Earth's crust where magma can escape
  16. 31. A very hard mineral made of carbon
  17. 32. A common igneous rock made of visible mineral grains
Down
  1. 2. A large moving section of Earth's lithosphere
  2. 3. A bowl-shaped depression around a volcanic opening
  3. 4. A naturally occurring solid made of minerals
  4. 7. A common mineral found in many types of rocks
  5. 8. The preserved remains or traces of ancient organisms
  6. 10. A deep valley with steep sides formed by erosion
  7. 11. Molten rock found beneath Earth's surface
  8. 12. A sedimentary rock made mainly from compacted mud
  9. 15. The thick layer beneath Earth's crust
  10. 16. Related to the movement of Earth's crustal plates
  11. 17. A metamorphic rock formed from limestone
  12. 19. The innermost layer of Earth
  13. 21. A sedimentary rock often formed from shells and marine organisms
  14. 25. The study of Earth, its rocks, and its history
  15. 27. Small pieces of rock, sand, or soil moved by water or wind
  16. 28. A dark volcanic rock formed from cooled lava