Across
- 4. supercontinent
- 6. geologic faults
- 9. is usually mass
- 11. combined with three types of rocks
- 14. interdependent elements
- 17. system measurement
- 19. oceanic trench
- 20. doing something active
Down
- 1. dark color rock
- 2. move across the earth's surface
- 3. the crust and upper mantle
- 5. bad judgement
- 7. a type of rock
- 8. a rock
- 10. to stretch
- 12. geologic process
- 13. is more than two thousand miles thick
- 15. solid ball of hot iron and nickel
- 16. mostly iron
- 18. scientist