On October 23rd, 2014, we updated our
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1. All sound waves are .
A. longitudinal waves
B. transverse waves
C. electromagnetic waves
D. standing waves
2. The speed of sound depends on .
A. the temperature of the medium
B. the density of the medium
C. the type of medium
D. how well the medium will transfer energy
E. All of the above
3. A sonar device can use echoes of ultrasound under water to find .
A. the speed of sound
B. the depth of the water
C. the temperature of the water
D. underwater objects
E. both B and D
4. During a thunderstorm, you see lightning before you hear thunder because .
A. the thunder occurs after the lightning
B. the thunder is farther away than the lightning
C. sound travels faster than light
D. light travels faster than sound
E. light travels in the form of a wave and sound does not