science definitions

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Across
  1. 3. / when its substance changes to a new substance
  2. 5. / the amount of space something takes up
  3. 6. / everything around you
  4. 9. / can see its parts
  5. 10. / substances that are a building block of matter
  6. 13. / electrons, protons, neutrons
  7. 14. / high matter,moves a lot
  8. 15. / medium matter, moves
Down
  1. 1. / looks like one substance
  2. 2. / physically joined together
  3. 3. / the branch of science that studies the properties of matter
  4. 4. / chemically joined together
  5. 7. / when its appearance changes
  6. 8. / more than one type of atom
  7. 11. / amount of matter in an object
  8. 12. / low matter, cant move