Across
- 3. dioxide you breathe it out
- 6. what teeth are made from
- 8. swimming pools are cleaned with this
- 9. bright lights
Down
- 1. bananas are rich in this
- 2. what bridges are made from
- 4. you breathe it
- 5. this is in batteries
- 6. a strong bond
- 7. canned foods are in this