9. Which phenomenon explains why sound is
at long distance at night than in day?
a. Echolocation C. refraction
b. Reflection
d. reverberation
10. As you shorten the string, the sound you
make when pluck it.
a. Gets lower in pitch c. get higher in pitch
b. Get louder
d.gets quieter
11. What is the relationship of temperature
to the speed of sound?
a. Equal
c. directly proportional
b. No relationship d. inversely proportional
12. How does a sound travel if the air
temperature is 20 degrees Celsius?
a. 334m/s 6.340m/s 0.343m/s
d.345m/s
13. Sound wave need a _travel through.
a. Medium b.none C. space d.vaccum
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