Physics Puzzle

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Across
  1. 2. Force exerted per unit area
  2. 4. Capacity to do work or produce heat
  3. 6. EFFECT Change in frequency of waves due to motion
  4. 8. Electromagnetic radiation that is visible to the human eye
  5. 10. Rate at which an object moves
  6. 11. Unit of energy
  7. 12. HOLE Region of space with intense gravitational pull
  8. 15. Tiny, discrete units of energy
  9. 17. Amount of matter in an object
  10. 21. Rate of change of velocity
  11. 22. Path for electric current to flow
  12. 25. Speed in a given direction
  13. 27. Principle that certain properties remain constant in a system
  14. 28. STRENGTH Maximum stress a material can withstand without permanent deformation
  15. 29. Push or pull on an object
  16. 30. Bending of waves around obstacles or openings
Down
  1. 1. MODEL Model of the atom with electrons in specific energy levels
  2. 3. All of space, matter, and energy
  3. 5. Force that attracts objects toward each other
  4. 7. Study of light and its properties
  5. 9. Measure of the average kinetic energy of particles
  6. 13. Electromagnetic radiation with high energy
  7. 14. Resistance to change in motion
  8. 16. Relating to atomic nuclei or nuclear reactions
  9. 18. Relating to atoms or atomic structure
  10. 19. Disturbance that transfers energy through a medium
  11. 20. Transfer of thermal energy between objects
  12. 23. ENERGY Energy of motion
  13. 24. Opposition to the flow of electric current
  14. 26. GRAVITY Absence of gravitational forces