7th-Grade Physical Science

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Across
  1. 2. electromagnetic wave that has a wavelength shorter than a microwave but longer than visible light
  2. 4. the transfer of light energy to matter
  3. 6. what you see when you see all colors of light combined in equal proportions
  4. 10. energy caused by an object's vibrations
  5. 15. permitting light to pass through, but not images
  6. 18. A measure of the average energy of motion of the particles of a substance.
  7. 19. the bouncing back of a ray of light, sound, or heat when the ray hits a surface that it does not go through
  8. 21. impossible to see through; preventing the passage of light
  9. 22. the energy an object has due to its motion
  10. 27. horizontal distance between the crests or between the troughs of two adjacent waves
  11. 28. an electromagnetic wave slightly more energetic than visible light, or "above purple"
  12. 29. the transfer of heat by the movement of a fluid in circular currents
Down
  1. 1. the part of the electromagnetic spectrum that you can see
  2. 3. the wave's height from the resting position to the crest
  3. 5. stored energy that results from the position or shape of an object
  4. 7. allowing light and images to pass through
  5. 8. A wave that requires no medium and can move through the vacuum of space.
  6. 9. energy released when atoms fuse or split apart
  7. 11. the electromagnetic wave with the lowest frequency and the longest wavelength
  8. 12. The bending of a wave as it passes at an angle from one medium to another
  9. 13. a wave that requires a medium through which to travel
  10. 14. the transfer of energy via electromagnetic waves
  11. 16. electromagnetic wave with a frequency higher than radio waves but lower than infrared
  12. 17. the total energy of motion in the particles of a substance
  13. 20. a form of energy that is released when atoms combine to form molecules,or when the bonds that form molecules are broken
  14. 23. the electromagnetic wave with the highest frequency and the shortest wavelength
  15. 24. the direct transfer of heat from molecule to molecule
  16. 25. reflection of light in all directions when it strikes an irregular surface
  17. 26. the number of complete wavelengths that pass a point in a given time