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Physical Science Test 8 Review CW1

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20
Across
4
Sound heard distinctly after being reflected off an object
5
Hollow body that reverberates sound waves
6
Random sound with no intended pattern
9
When natural frequency = driving frequency
11
When two notes interfere harmoniously
13
Multiple reflections causing a persistence of sound not heard as separate sounds
14
Instruments distinctive sound quality
17
Max distance particles are displaced by a wave
19
Sound that can be heard
20
Series of organized sound waves produced by an instrument
Down
1
Number of waves that pass a given point per unit time
2
Time needed for one wave to pass
3
Periodic back and froth motion that transmits energy
7
Vibrations traveling through a medium in the form of longitudinal pressure waves
8
Change in a wave's direction when passing from one substance to another
10
Sound below the range of human hearing
12
Substance through which a wave transfers energy
15
Strength of a sound wave
16
Effect of sound wave strength on how the human ear perceives sound
18
Effect of frequency on the way our ear perceives sound