Chapter 22, 23, and 24 Crossword Puzzle by Peter N.

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Across
  1. 4. a measure of the amount of electrical potential energy an electron flowing in a circuit can gain and is measured in volts
  2. 7. electric current that changes its direction repeatedly
  3. 9. complete range of electromagnetic wave frequencies and wavelengths
  4. 11. device used to increase or decrease the voltage of an alternating current
  5. 12. a measure of how difficult it is for electrons to flow in a material
  6. 14. magnet created by wrapping a current-carrying wire around an iron core.
  7. 18. mechanical wave that causes particles in matter to move back and forth along the direction the wave travels
  8. 21. distance between one point on a wave and the nearest point moving with the same speed and direction
  9. 24. mechanical wave that causes particles in matter to move at right angles to the direction the wave travels
  10. 27. states that the angle the incoming wave makes with the normal to the reflecting surface equals the angle the reflected wave makes with the surface
  11. 31. disturbance that moves through matter and space and carries energy
  12. 32. repeated echoes of sound waves
  13. 33. the flow of electric charge, measured in amperes
  14. 34. states that the current in a circuit equals the voltage divided by the resistance in the circuit
  15. 35. closed conducting loop in which electric current can flow continually
  16. 36. electric currrent that flows only in one direction
  17. 37. bending of waves around an object
  18. 39. amount of energy a wave carries past a certain area each second
  19. 40. device that transforms electrical energy into kinetic energy
Down
  1. 1. material where electrons can move easily
  2. 2. light display that occures when charged particles trapped in the magnetosphere collide with Earth's atmosphere above the poles
  3. 3. surrounds every electric charge and exerts force on other electric charges
  4. 5. imbalance of electric charge on an object
  5. 6. waves that cant ravel through matter or empty space
  6. 8. material where electrons can't move easily
  7. 10. electromagnetic waves with wavelengths between about 400 billionths and 10 billionths of a meter
  8. 13. rapid movement of excess charge from one place to another
  9. 15. number of wavelengths that pass a given point each second
  10. 16. circuit that has more than one path for electric current to follow
  11. 17. electromagnetic waves with wavelengths between about one thousandth of a meter and 700 billionths of a meter
  12. 19. rate at which electrical energy is convertend into other forms of energy
  13. 20. region of space affected by Earth's magnetic field.
  14. 22. group of atoms whose fieldspoint at the same direction
  15. 23. device that uses a magnetic field to turn kinetic energy into electrical energy
  16. 25. attractive or repulsive force exerted by all charged objects on each other
  17. 26. circuit that has only one path for electric current to follow
  18. 28. change in direction of a wave when it changes speed as it travels from one material into another
  19. 29. human perception of the frequency of sound
  20. 30. surrounds a magnet and exerts a magnetic force on other magnets
  21. 38. postively or negatively charged atom