Science Crossword Puzzle

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Across
  1. 4. Middle
  2. 7. Straigh line
  3. 9. Bb
  4. 10. Force acting on an object
  5. 13. Time
  6. 14. Freckles
  7. 15. tt
  8. 16. Division finishes
  9. 17. Rocket speed
  10. 18. Building
  11. 19. Hitting a nail
Down
  1. 1. Start to divide
  2. 2. TT
  3. 3. AA
  4. 4. Push or Pull
  5. 5. Bottle caps
  6. 6. MPH
  7. 8. Used to raise heavy weights
  8. 11. Walking
  9. 12. Pendelum