Earth's Systems Crossword

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Across
  1. 4. The semi-fluid layer below the lithosphere that plates move on.
  2. 5. The theory explaining the movement of Earth's plates.
  3. 10. A boundary where tectonic plates collide.
  4. 11. The supercontinent that existed millions of years ago.
  5. 15. A scale used to describe Earth’s history over billions of years.
  6. 16. A landform created when magma reaches the surface.
  7. 17. The rigid outer layer of Earth broken into tectonic plates.
  8. 18. Molten rock beneath Earth’s surface.
  9. 19. The process where one tectonic plate sinks beneath another.
  10. 20. A deep underwater valley formed by subduction.
  11. 22. The process that creates new oceanic crust at mid-ocean ridges.
  12. 23. The idea that continents slowly move across Earth's surface.
  13. 25. An underwater mountain range formed at divergent boundaries.
Down
  1. 1. A destructive force that wears away landforms.
  2. 2. The laying down of sediment in new locations.
  3. 3. The outermost layer of Earth.
  4. 6. A boundary where tectonic plates slide past each other.
  5. 7. Large pieces of Earth's crust that move over time.
  6. 8. A sudden shaking caused by movement along plate boundaries.
  7. 9. The thick layer of Earth where convection currents occur.
  8. 12. A boundary where tectonic plates move away from each other.
  9. 13. The movement of heat through fluids, responsible for driving plate movement.
  10. 14. Remains of ancient organisms used as evidence of plate movement.
  11. 21. Strata used to study Earth's history and plate movements.
  12. 24. The center of Earth, which provides the heat that powers convection.