Science Crossword Puzzel

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Across
  1. 3. Waves: Are waves that can travels through matter or empty space.
  2. 6. number of wave lengths that pass by a point each second.
  3. 7. A disturbance that moves through matter or space.
  4. 9. Wave: Causes practicals in matter to move back and forth along the same direction the wave travels.
Down
  1. 1. the change in direction of a wave when it changes speed as it travels from one material to another
  2. 2. of Reflection: The angle that incoming wave makes withe the normal equals the angle that the outgoing makes with the normal.
  3. 4. Spectrum: The complete range of electromagnetic wave frequencies and wave length.
  4. 5. Wave: Causes practicals in matter to move back and forth at right angles to the direction in which the wave travels.
  5. 7. Length: The distance between one point on a wave and the nearest point moving with same speed and direction
  6. 8. Waves:Wavelengths that are greater then 0.3 meters