8th grade review

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Across
  1. 4. _________= distance / time
  2. 5. warm ocean currents originate here
  3. 6. stored energy
  4. 10. determines the atoms reactivity
  5. 12. atoms that are in the same ________ will behave similarly
  6. 14. warmer air rises because it is _______ dense than cooler air
  7. 15. this group on the periodic table has 7 valence electrons
  8. 16. positively charged particle
  9. 17. particle with no charge
  10. 19. a tendency to do nothing or remain unchanged (1st law)
  11. 21. energy of motion
Down
  1. 1. this group on the periodic table has a full outer shell
  2. 2. Newtons __________ law. F=ma
  3. 3. color change is an example of a _____________ reaction
  4. 7. an object that is acted on by unbalanced forces will ___________________________.
  5. 8. H2O is an example of a chemical ____________
  6. 9. a push or a pull on an object
  7. 11. negatively charged particle that orbits the nucleus
  8. 13. the speed of something in a given direction
  9. 18. _________= mass / volume
  10. 20. for every action, there is an equal and opposite reaction. Newtons __________ law.