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