Speed of Sound

Which state of matter do sounds travel fastest in?

• Solid

• Liquid

• Gas

• Plasma

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Why does sound travel faster in solids than in liquids or gases.

• They are harder.

• The particles are closer together.

• Solids have more energy.

• Gases fill their container.

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Roughly what is the speed of sound in air?

• About 350 m/s

• About 1 500 m/s

• About 5000 m/s

• About 1800 m/s

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Roughly what is the speed of sound in water?

• About 350 m/s

• About 1 500 m/s

• About 5000 m/s

• About 1800 m/s

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Calculate the speed of sound if a sound wave travels 680 m in 2 seconds.

• 1360 m/s

• 340 m/s

• The speed of sound is always the same

• 250 m/s

A sound wave travels through air. It travels 3 400m at a speed of 340 m/s. How long does it take to get there?

• 102000 seconds

• 666 seconds

• 4.25 seconds

• 10 seconds

A teacher tries to work out the speed of sound. She bangs two bits of wood together. She hears an echo from a wall. The wall is 25m away. How far has the sound travelled?

• 340 m

• 25 m

• 50 m

• 12.5 m

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