Physics Crossword Puzzle

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Across
  1. 3. every action has an equal and opposite reaction
  2. 6. a type of wave that does not need a medium to travel through
  3. 7. a vector quantity that describes how an object's speed or direction is changing
  4. 9. the amount of matter in an object
  5. 10. how difficult it is to stop a moving object
  6. 11. a push or apull
  7. 14. the number of complete cycles in one second
  8. 16. when two or more waves occupy the same time and sopace
  9. 17. the imaginary line perpendicular to the surface of a medium in which all angles are measured from
  10. 18. a form of energy an object posesses due to its speed
  11. 19. a vector quantity that describes how fast an object is moving
Down
  1. 1. the force of gravity acting on an object
  2. 2. a type of wave in which the vibrations are perpendicular to motion
  3. 4. the contact force that opposes motion
  4. 5. the unit used for measuring forces
  5. 8. a wave phenomena in which one vibrating object can cause another to begin vibrations if it matches its natural frequency
  6. 12. the changing of a wave's speed as it crosses the boundary between mediums
  7. 13. a quantity with magnitude only
  8. 15. a form of energy an object possesses due to its position