Science

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Across
  1. 6. A blend of 2 or more substances
  2. 9. Number/ This tells you the element and the number of protons
  3. 11. Does not allow electrons to flow
  4. 12. A material that does not dissolve in something else
  5. 13. control group/ A substance we know should change
  6. 15. Is a characteristic of a substance that doesn’t change
  7. 16. The part of an atom with no charge
  8. 19. How a substance interact with fire
  9. 20. Light emitting diode
  10. 22. A power source
  11. 23. Its particles are slightly apart
  12. 24. The part of an atom with a positive charge
  13. 25. The center of an atom holding the proton and neutron
Down
  1. 1. Allows electrons to flow
  2. 2. control group/ A substance we know should not change
  3. 3. Anything that has mass and takes up space
  4. 4. A system that uses water to grow plants
  5. 5. Its particles are tightly packed together
  6. 7. Electron/ Electrons found in the outer ring
  7. 8. Made up of only one material
  8. 10. A device that permits current to flow in one direction
  9. 14. the tiny things that make up matter
  10. 17. The negative part of an atom
  11. 18. How much matter is in a certain space
  12. 21. A material that can dissolve in something else