Across
- 2. used to power cars back in the 19s
- 5. really small pebbles
- 7. in a dime
- 9. atomic number 100
- 11. the best heats conductor
- 15. named after a planet
Down
- 1. a common crystal
- 2. will turn brown to green after a while
- 3. stuff you breath
- 4. put in balloons
- 5. very expensive
- 6. put on a ring
- 8. It’s more radioactive than uranium
- 10. used for pipes
- 12. something that turns into Sapphire after many many years
- 13. green ore
- 14. the gas that comes of 2