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