Across
- 2. pennies used to be made from this element
- 4. Thomas Jefferson is on this coin
- 7. plants produce this element
- 8. the strongest metal on earth
- 9. this is put in pools to keep the water clear
- 13. the element wizards tried to make
- 14. milk helps your bones build this
- 16. soda cans are made from
- 19. this element is used in Iron Man's arc reactor
- 20. salt element
Down
- 1. is a gas used to make signs
- 3. makes your voice high when you breath it
- 5. the planet that Superman is from
- 6. is used to clean the skin before surgery
- 10. people mad cups from this and would get poisoned
- 11. bananas are a good source
- 12. this can help you sleep at night
- 15. element named after the best nation in the world
- 17. type of battery
- 18. used to make nuclear power