Across
- 5. a rupture in the crust
- 7. relating to or involving volcanic or plutonic processes.
- 8. the outermost shell of a terrestrial planet.
- 12. a layer of silicate rock between the crust and the outer core.
- 13. type of rock made by mineral particles
- 15. the breaking down or dissolving of rocks
- 16. sudden violent shaking of the ground,
- 17. It is primarily a solid ball
- 19. places where plates slide sideways past each other.
- 20. when two tectonic plates move away from each other
Down
- 1. a dark-coloured igneous rock
- 2. a measure of the strength of earthquakes
- 3. a series of waves
- 4. rock that has undergone transformation by heat
- 6. an area on Earth where two or more lithospheric plates collide.
- 9. the theory that Earth's outer shell is divided into large slabs of solid rock
- 10. a record of the ground motion
- 11. the third layer of the Earth.
- 14. zone of a celestial body
- 18. a supercontinent that incorporated almost all the landmasses on Earth