science

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Across
  1. 1. answers posed question
  2. 4. space object takes up
  3. 7. system of ideas intended to explain something
  4. 10. mesuarment of how much matter is in object
  5. 12. smallest building block
  6. 13. 2+ atoms w same atomic number
  7. 14. logical relationship between 2 things
Down
  1. 2. controlled by experimenter
  2. 3. educated guess
  3. 5. value of substance
  4. 6. statement that cant be proven
  5. 8. statement established by observation
  6. 9. mass # of protons + neutrons
  7. 11. atom created by gain of electron