PLATE TECTONICS
Across
- 1. Wegener proposed the theory of continental …… to explain why the same fossils exist on separate continents.
- 4. Magma that has flowed onto the Earth’s surface.
- 6. Type of plate boundary where plates move away from each other.
- 7. Lava from a volcano cools and solidifies into this.
- 11. Occurs when one plate sinks below another plate.
- 12. Type of plate boundary where plates move towards each other.
- 15. These occur around the “Ring of Fire”.
- 16. Layer of the Earth where convection currents occur.
- 18. Much of New Zealand’s south island rests on this plate.
Down
- 2. Huge wave caused by an undersea earthquake.
- 3. Forms under the ocean at the site of a diverging boundary – a mid-ocean ……
- 5. The crust and uppermost solid mantle.
- 8. Thinnest type of crust.
- 9. Type of current in the mantle that causes tectonic plates to move.
- 10. Large, but separate pieces of lithosphere are called …. plates.
- 13. This forms on the ocean floor above a subduction zone – an ocean …….
- 14. Very hot molten rock that rises by convection within the mantle.
- 17. Very fine, light rock particles that issue from a volcano & form a rapidly rising cloud - volcanic …