Across
- 4. Once living things
- 6. To save from injury, loss, or ruin
- 7. Using carefully
- 9. To process
- 11. Not existing
- 13. A system made up of living things
Down
- 1. To give support
- 2. To spoil
- 3. Surrounds the earth
- 5. Relating to
- 8. Where a plant or animal lives or grows
- 10. To give birth
- 11. Relationship between living things
- 12. Social conditions