Across
- 2. rocket fuel
- 4. glass ceramics and concrete
- 7. its used in soaps
- 8. in pools and water
- 9. makes food taste good
- 11. is used to make aircraft
- 12. like a shield
- 13. used for balloons
- 14. vital to survive
- 15. fireworks and medicine
- 18. its in toothpaste
Down
- 1. you breath it out
- 3. strong bones and teeth
- 5. a very light metal
- 6. used for explosive
- 7. matches and steel
- 10. to wrap sandwiches
- 16. our drive in volcano
- 17. bright lights
- 19. you need it to function