WorksheetsReflection of Sound Waves
Total questions: 10
Worksheet time: 6mins
When Mr. Sunshine yells his name in a cave, the sound reflects off the walls of the cave and travels back to his ears. What is this called?
absorption
echo
frequency
refraction
Ultrasound is a kind of sound wave with its frequency of more than ......
20 kHz
30 kHz
40 kHz
50 kHz
__________ is a sound reflection technology applied in ships at sea using the reflection of sound waves to determine the depth of the sea.
Echo
Reflection
Solar
Sonar
What is the importance of sonar for submarine navigation?
Helps in weather forecast.
Helps the submarine to slow down its speed.
Helps the submarine to move faster.
Helps to detect object under the surface of water.
______ is used to see inside the human body during pregnancy or for diagnostics.
Ultrasound
Infrasound
Sonar
X-ray
Tick the correct applications of sound reflection in daily life
Which of these animals uses ultrasound?
Dolphins warn each other of the presence of predator using ultrasound. We cannot hear the ultrasound because
the sound is too low.
human can only hear sound of frequency range from 20 Hz to 20 000 Hz.
the sound was absorbed by water.
the sound produce multiple echo until our ears cannot capture it.
Tick the devices to overcome human limitations of hearing
(2 answers)
Microscopes
Stethoscopes
A megaphone
Periscope
Which of the following is used to listen to the heartbeat of a patient?
Stethoscope
Microphone
Microscope
Hearing aid
