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Across
2.maxinum distance particles can travel from rest, positive.
5.frequencies above the normal range of hearing
7.energy travels through
13.the close together
14.what energy travels through
16.a wave that moves the wave particles back and forth
18.what travels through waves
19.see through somewhat, but not in detail
20. requires medium
Down
1. cannot see through
3.travels at a right angle to its direction, up and down wave
4.the distance of the direction of a wave
6.certain amount of waves produced in a certain amount of time
8.what causes waves to start
9.the spread out part of a wave
10.no medium needed, vacuum
11.frenquencies below normal hearing range
12.speed/frenquency x wavelength
15.the highest part of the wave
17.the lowest part of the wave
