Across
- 2. in milk
- 4. used in bulbs
- 6. strong metal
- 7. song made about it
- 10. a gray metal
- 13. think clean swimming pool
- 15. orange then turns green when left out
- 17. used to test for starch
Down
- 1. used in party balloons
- 3. tin foil
- 5. 78% of the air around us
- 8. coke, fanta, sprite, 7up
- 9. planet
- 11. think superman
- 12. used in advertising signs
- 14. heaviest metal
- 16. rich