Physical Science Crossword puzzle

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Across
  1. 4. A fundamental particle with a negative charge
  2. 7. The process by which plants convert sunlight into chemical energy
  3. 8. A circuit component that stores electrical energy
  4. 9. The force that opposes the motion of an object through a fluid (e.g., air or water)
  5. 11. The unit of electrical current
  6. 13. The amount of matter in an object
  7. 15. The unit of electrical resistance
  8. 17. The bending of light as it passes from one medium to another
  9. 19. The process by which an unstable atomic nucleus releases energy
Down
  1. 1. A subatomic particle found in the nucleus of an atom
  2. 2. A measure of the average kinetic energy of particles in a substance
  3. 3. The SI unit of force
  4. 5. The SI unit of electric charge
  5. 6. A device that converts mechanical energy into electrical energy
  6. 10. A substance that speeds up chemical reactions without being consumed
  7. 12. A measure of disorder or randomness in a system
  8. 14. The branch of physics that deals with the behavior of very small particles
  9. 16. A type of electromagnetic radiation with the shortest wavelength
  10. 18. The study of the behavior of fluids at rest and in motion