Plate Tectonics
Across
- 5. name for the crust and the upper mantle together, earth's tectonic plates.
- 7. transverse seismic wave that travels through earth
- 10. molten rock that has erupted onto earth's surface.
- 12. plate boundary where lithosphere is destroyed.
- 13. the centre of earth.
- 14. a zone where earth's crust and mantle are being pulled apart.
- 15. section of earth's crust that moves
- 16. where plates are moving apart from each other in opposite directions.
- 18. layer beneath earth's crust.
- 20. the separating of continents by drifting across earth's surface.
- 21. a layer of 'plastic' semi-solid rock in the lower mantle on which earth's tectonic plates move.
Down
- 1. when one plate sinks below another plate during collision.
- 2. a depression in the ocean floor.
- 3. plate boundary where new crust is formed.
- 4. a deep channel in the ocean floor where crust is sinking downwards.
- 6. patterns of magnetism trapped in rocks on each side of plate boundaries.
- 8. crust that forms the ocean floor.
- 9. earth's outermost solid layer.
- 11. on earth's surface.
- 17. the process of continents breaking up, subsiding and allowing in water from the sea.
- 19. molten rock below earth's surface.