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WorksheetsUsing Sound
Total questions: 15
Worksheet time: 15mins
Objects can be detected underwater by using sound waves above 20,000 Hz; ultrasonic.
True
False
If a wrecked ship sits 1,500 meters beneath the surface of the ocean and sound travels 1,500 meters/second in water 20⁰C, how long will it take, in seconds, for the sound to travel to the surface of the wrecked ship and return to the surface of the ocean?
1 second
2 seconds
10 seconds
0.1 seconds
Humans perceive pitch primarily because of the wave's frequency.
True
False
Which of the following is the term that describes the frequency at which a material tends to vibrate when it is disturbed?
pitch
sound quality
resonance
natural frequency
Which of these instruments would have a resonator?
Violin
Guitar
Kettledrum
Flute
(a) is the use of reflected sound waves determine distances to locate objects.
A (a) device sends a burst of ultrasound waves that travel through the water.
Dogs can hear ultrasound frequencies up to about ______ Hz, well above the upper limit for humans.
25,000
45,000
30,000
50,000
Give an example of an animal that uses echolocation to navigate and find food.
Bats use ultrasound waves with frequencies up to ________ Hz, to move around and hunt.
150,000
10,000
100,000
110,000
Dolphins sense reflected sound wave through their (a) .
What happens to sound waves as they strike an object?
What is the phenomenon called when sound waves are used to measure the depth of the ocean?
Sonar
Radar
Lidar
Ultrasound
Which of the following devices uses sound waves to create images of organs inside the body?
X-ray machine
MRI scanner
Ultrasound machine
CT scanner
In which medium does sound travel the fastest?
Air
Water
Steel
Vacuum
