Ch 1 and 2 Crossword

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Across
  1. 4. a guess that can be tested for
  2. 6. anything that occupies space and has mass
  3. 7. the smallest units that retain all of the properties of their type of matter
  4. 8. 65% of our body weight
  5. 9. any field of study that is falsely presented as having a scientific basis
  6. 10. have a positive charge
  7. 13. have a negative charge
Down
  1. 1. written on the left of chemical reactions
  2. 2. the scientific study of matter
  3. 3. have no charge
  4. 5. type of bond that involves the sharing of electrons
  5. 9. written on the right of chemical reactions
  6. 11. ties together and explains ideas based upon evidence and experiments
  7. 12. type of bond that involves the transfer of electrons