The Changing Earth

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Across
  1. 1. / Molten rock below the Earth's surface
  2. 3. / When oceanic crust collides with continental crust, and the oceanic plate then sinks below the continental plate
  3. 4. Arc / A chain of islands formed at the edges of colliding tectonic plates where one plate subducts
  4. 5. Drift / The separating of continents by drifting across the oceans
  5. 8. / An instruments that detects the seismic waves from an earthquakes
  6. 11. Flow / A cloud of ash, rock and gas about 500°C that exists from a volcano like an avalanche
  7. 16. / The rapid movement of the ground, usually back and forth and up and down in a wave motion due to the movement of tectonic plates
  8. 18. Wave / The shaking, wave-like movement of the ground in an earthquake
  9. 19. Stripping / Patterns of magnetism trapped in rocks on each side of plate boundaries
  10. 20. / The point on the Earth's surface directly above the focus of an earthquake
  11. 21. A huge wave in the ocean caused by an earthquake occurring on the seafloor
  12. 22. Ground Station / A receiver and computer that can detect satellite signals and calculate its position on the Earth's surface
  13. 23. / The place below ground where an earthquake starts
  14. 24. Spots / Isolated places away from plate boundaries where a lot of hot magma is being created
  15. 25. Trench / A deep trench in the ocean floor that is much deeper than the rest of the ocean floor
  16. 26. Wave / A longitudinal seismic wave that travels fast through the Earth
Down
  1. 2. / A place where and extremely hot material from inside the Earth erupts at the surface
  2. 3. / Where the crust is sinking down into the Earth
  3. 6. Crust / The crust that forms the ocean floor
  4. 7. / A layer of 'plastic' semi-solid rock in the lower mantle
  5. 9. / The process of continents breaking up, subsiding and allowing in the sea
  6. 10. Wave / A seismic wave that travels along the surface of the Earth in the crust
  7. 11. Tectonics / The theory that the Earth's crust is cracked into many large pieces that move on the asthenosphere
  8. 12. Crust / The crust that forms the continents
  9. 13. Boundary / Where plates are colliding with each other
  10. 14. Boundary / Where plates are moving apart from each other in opposite directions
  11. 15. Wave / A transverse seismic wave that travels through the Earth
  12. 17. Boundary / Where plates are sliding parallel to each other but in opposite directions
  13. 18. Spreading / The process of new crust forming at the ocean ridges and spreading outwards