Across
- 3. the out-most layer in the earth
- 6. sideways and downward movements
- 8. a construction or structure
- 10. lard amount of matter
- 12. a measuring system
- 16. the middle of the earth
- 17. mass of matter.
Down
- 1. a type of substance
- 2. systematic activity
- 4. a rock formation
- 5. supercontinent that was from long ago
- 7. describing the class
- 9. earths fluid layer
- 11. between mountains and highlands
- 13. the amount of space
- 14. a system that scientist use
- 15. a movement