Across
- 4. fossil fuel.
- 8. Almost extinct.
- 11. very hard material.
- 13. Mixture of organic material.
- 14. Has an atomic number of 15.
Down
- 1. Area of land full of trees.
- 2. Inorganic element compound.
- 3. Black rock.
- 5. Area saturated with water.
- 6. fruits or vegetables grown for human consumption
- 7. radiation from the sun
- 9. Element that helps muscles store and use oxygen.
- 10. Aquatic animal.
- 12. Also known as petroleum.
- 15. Gas that we need to breathe.