Across
- 4. hard but liable to break.
- 7. outermost solid shell.
- 10. increase of pressure.
- 12. where two plates move away from each other.
- 13. a solid ball of dense metal.
- 14. no strain in a structure.
- 15. able to be deformed without losing toughness.
Down
- 1. made of magnesium oxide silicates.
- 2. a place where plates go under one another.
- 3. a rigid shell.
- 5. below the lithosphere.
- 6. liquid iron and nickle.
- 8. applying a force to.
- 9. getting closer.
- 11. a special variety of a strike-slip fault.