Earth Science

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Across
  1. 2. Earth's thickest layer
  2. 4. Molten rock beneath the Earth's surface
  3. 8. A theory explaining the structure of the Earth's crust
  4. 13. Earth's outermost layer
  5. 15. Earth's solid center
  6. 16. The layer below Earth's mantle
  7. 17. A deep valley that is formed when an oceanic plate collides with a continental plate
  8. 19. An opening in the Earth's surface
  9. 20. The region where magma breaks through the surface
  10. 21. Made up of crust and uppermost mantle
Down
  1. 1. Sudden ground-shaking release of built up energy
  2. 3. When magma rises to the Earth's surface, pushing rock aside
  3. 5. Areas of subduction typically experience large earthquakes
  4. 6. Large breaks in rocks
  5. 7. Forms the lithosphere
  6. 9. Area where molten rock rises to the Earth's surface
  7. 10. Volcanoes that occur where magma erupts through long cracks in the lithosphere
  8. 11. The region where two tectonic plates are in contact
  9. 12. Point on Earth's surface directly above the focus where earthquakes form
  10. 14. Partly molten layer in the Earth's upper mantle
  11. 18. Steep sided valley formed on land