Across
- 2. Carbon, water and sulfa are ________ resources.
- 4. When vital resources deplete, they _______.
- 7. carbon, hyrdogen and oxygen are all
- 9. Worms, bacteria and ___ break down dead things.
- 10. combination of elements
- 11. 2 hydrogen atoms + 1 oxygen atom:pronounced H2O
- 12. water is amajor element in our_____ composition
- 13. sodium chloride
Down
- 1. raw material is available here
- 3. The Periodic _____ contains info about elements
- 5. what paper is made from
- 6. makes party balloons rise
- 8. scientific name for salt: ______ chloride
- 11. area of forrest
- 14. idea or argument that something is true