Across
- 4. used in teeth cleaners
- 5. used for microscope slides
- 6. sterling _________
- 7. we need this to breath
- 9. shares its name with a coin
- 11. found in expensive jewelry
- 12. fist element
Down
- 1. makes your voice higher than it is originally
- 2. element symbol is C
- 3. used in plastic materials
- 5. buildings are often made of this
- 6. used in fireworks and releases a bad odor
- 8. used in glowing signs
- 10. pennies used to be made of this