movement measures of waves

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Across
  1. 4. a system of detecting a sound wave
  2. 5. the energy or height of a wave also related to volume
  3. 6. the highness or lowness of a tone/sound
  4. 9. loosely packed part of the wave
  5. 11. the movement of going back and forth
  6. 12. the process of changing in shape or distorting when pressure is applied
  7. 13. strength or energy as an attribute of physical action or movement
  8. 15. energy traveling through a medium
  9. 17. the number of waves per second
  10. 18. the substance though which sound waves travel though (liquid solid gas)
  11. 20. bending as the wave passes though different mediums
Down
  1. 1. how loud or intensity of a sound based on its amplitude
  2. 2. energy the energy an object has due its motion, mass, and speed
  3. 3. Sound waves that have frequencies above 20,000 Hz that humans can't ear
  4. 7. the particles in the wave bunch together compressing
  5. 8. the use of reflection of sound waves to navigate and find prey
  6. 10. a substance that makes up space
  7. 14. bouncing off a surface
  8. 16. the distance between wave crests
  9. 19. power derived chemical resources most of the time to provide light and heat or to work machines.