science

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