Science crossword puzzle

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Across
  1. 4. A measurement of the amount of energy transferred by a wave.
  2. 5. A wave in which the vibrating element moves in a direction perpendicular to the direction of advance of the wave.
  3. 7. A decrease in the density of something
  4. 8. A physical force, agent, or process, either abiotic or biotic, causing a perturbation or stress
  5. 9. The distance from one crest to another, or from one trough to another, of a wave
Down
  1. 1. The substance that transfers the energy, or light from one substance to another substance or from one place to another, or from one surface to another.
  2. 2. The act of pressing something into a smaller space or putting pressure on it from different sides until it gets smaller
  3. 3. The ability to do work
  4. 6. A point on a surface wave where the displacement of the medium is at a maximum.
  5. 10. The lowest part of the wave