Speed of Sound Worksheet
Explore the concept of the speed of sound, factors affecting it, and related calculations with this Grade 9 Science worksheet.
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Speed of Sound Worksheet
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Read each question carefully and answer to the best of your ability. Show all your work for calculations.
1. In which medium does sound travel fastest?
Air
Water
Steel
Vacuum
2. What is the approximate speed of sound in dry air at 20°C?
300 m/s
343 m/s
1500 m/s
5000 m/s
1. Sound waves are waves, meaning the particles of the medium vibrate parallel to the direction of wave propagation.
2. The speed of sound increases as the of the medium increases.
3. Sound cannot travel through a because there are no particles to transmit the vibrations.
1. The speed of sound is constant in all mediums.
True
False
2. Sound travels faster in warmer air than in colder air.
True
False
1. Explain why sound travels faster in solids than in liquids or gases.
2. A person shouts towards a cliff and hears an echo 3 seconds later. If the speed of sound in air is 340 m/s, how far away is the cliff?
Observe the diagram below showing sound waves.
1. Label the compressions and rarefactions on the diagram provided (or describe their positions if you cannot label directly).