Font size
WorksheetsReflection of Sound
Total questions: 30
Worksheet time: 1hrs 12mins
Which of these used the application of reflection of sound in medical field?
_______________________ is a system that uses sound waves to determine locations of objects in the water
ultrasonic scan
sonar
periscope
Sara and Maria made a telephone using two cups and a string. It was a very long string. Maria went upstairs in her house and Sara stayed downstairs. Maria spoke softly into the can. "I can hear you!" Sara said back. How can this happen?
Sound waves travel through a vacuum.
Sound waves travel through solids like the string.
Sound waves travel from high to low.
Maria talked so loudly that Sara could hear her without the phone.
Which of the following is NOT an application of sound reflection in daily life
Which of these animals uses ultrasound?
Tick ALL areas where echoes can be heard.
Cave
Field
Tunnel
A closed hall
Fishermen use a depth finder to send ultrasonic waves into the water. The time it takes for sound waves to return helps them determine where to fish. Which property of sound reveals the location?
frequency
intensity
pitch
reflection
Why can't humans hear sounds made by animals such as whales?
Humans have a great range of sounds that can be heard.
There are ultrasounds and infrasounds beyond human hearing.
Whales live in the water where sound is unable to be transmitted.
Whales are too large to make any sounds.
Sometimes echo of the same sound is heard more than once. Such multiple echoes are known as:
reverberation
restoration
density
amplitude
Simple devices based on multiple reflection of sound are:
Guitar, drum, trumpet
Beaker, test tubes, spatula
Bulb, candle, torch
Stethoscope, Megaphone, Hearing aid
Why is there no sound in space?
There is no material (medium) for the energy to travel through.
The molecules in space are too small.
Sound needs the correct temperature to travel through.
Sound only travels through solid material.
The frequency of sound that can be detected by humans is within the range of _________
67 Hz to 45 000 Hz
16 Hz to 12 000 Hz
20 Hz to 20 000 Hz
2 000 Hz to 110 000 Hz
What does SONAR stand for?
Science Navigation and Ranging
Sound Navigation and Roaming
Sound Navigation And Ranging
Sound Negativity And Ranging
Mr. On is floating in his submarine and is worried about crashing into an underwater cliff. He sends out a SONAR pulse at 1500 m/s. The sound is reflected after 7 s. How far is Mr. On's submarine to the underwater cliff?
10, 500 m
5, 250 m
21,000 m
214 m
The echo-sounder of a ship measures an interval of 0.6s and the speed of sound in water is 1200 ms-1.
Calculate the depth, in m, of the sea?
680 m
390 m
720 m
360 m
In industry, all true about ultrasonic scanning is used to, except ....
Cutting and welding metals
Locate the boundaries between rock layers
Measure depth of the sea
Detect cracks in metal structures
Which materials reflect sound well?
What is transferred from place to place by waves?
matter
energy
particles
waves
If the wavelength of a wave increased, what would happen to the frequency?
decrease
increase
stay the same
