plate tectonics
Across
- 3. a deep trench in the ocean floor that is much deeper than the rest of the ocean floor
- 4. a layer of plastic semi-solid rock in the lower mantle
- 5. molten rock that has erupted onto the earths surface
- 7. the process of new crust forming at the ocean ridges and spreading outwards
- 8. where the crust is sinking down into the earth
- 9. a huge wave in the ocean caused by and earthquake occurring on the seafloor
- 10. molten rock below the earth surface
Down
- 1. the process of the
- 2. the separating of continents by drifting across the ocean
- 6. a place where extremely hot material from inside the earth erupts at the surface
- 7. a seismic wave that travels along the surface of the earth in the crust