LCMS 8th Grade Science Extra Credit Crossword Puzzle

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Across
  1. 2. two or more elements chemically combined
  2. 4. a change in speed
  3. 7. sum of all forces acting on an object
  4. 9. two or more opposite forces that do not cause a change in motion
  5. 10. tendency of objects to resist change in motion
  6. 12. unit for distance
  7. 16. equals the total number of protons and neutrons
  8. 17. tells you how many protons in an atom
  9. 19. the force of gravity acting on an object
  10. 20. the amount of space an object takes up
Down
  1. 1. a push or a pull
  2. 3. the electrons on the outermost shell
  3. 5. the amount of mass in a known volume of an object
  4. 6. speed and direction
  5. 8. a pure substance that cannot be broken down into simpler substances
  6. 11. unit for force
  7. 13. cause a change in motion, speed, or direction
  8. 14. rate at which a chemical substance undergoes a chemical reaction
  9. 15. distance traveled over a given time
  10. 18. unit for mass
  11. 21. amount of matter in an object