Across
- 2. we breathe this
- 3. two elements chemically bonded
- 5. gives out heat
- 8. single type of atom
- 9. we can use a .... in a reaction
- 11. something that reacts with other things
- 13. if water cools down it becomes a....
- 15. makes up everything
- 16. this makes up over 70% of air
- 17. this process breaks bonds in compounds
- 18. chemical reaction are what we did in....
- 19. this attracts some metals
Down
- 1. we can write chemical reactions in a ......
- 4. a invisible force in magnets
- 5. a magnet that can be turned on and off
- 6. if water is at room temp it is a .....
- 7. if a substance is .......... it emits radiation
- 10. two elements mixed
- 12. takes in heat
- 14. we get burn this to get a white powder