science cross word

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Across
  1. 5. rows
  2. 6. material that cannot be broken down into any simpler substance
  3. 10. Slow chemical reaction involving oxygen in air reacting with metal
  4. 11. a chemical reaction which releases heat
  5. 12. The material at the start of the reaction
  6. 13. solid to gas
  7. 14. forms news substance. The new material has new properties from the original properties
  8. 18. art magician, part scientist.They did event tools that are still used today
  9. 20. 2 or more elements combined
  10. 21. the material produced
  11. 22. Everything was made up of Earth, Air, Water, and Fire
  12. 23. particles that are so small its difficult to separate
Down
  1. 1. no new substance only the state of the substance changes
  2. 2. a reaction that absorbs heat
  3. 3. gas to liquad
  4. 4. You can see the different substances that make up the mixture
  5. 7. the total mass or the protons and neutrons
  6. 8. The different substances that make it up are not separately visible
  7. 9. have both metal and non-metal property's
  8. 15. It has only one proton, one electron and No neutrons
  9. 16. gas to solid
  10. 17. Accidentally discovered,used to make pot, coins, jewelry, and tools.
  11. 19. are positively charged in the nucleus