Factors that influence the speed of sound

How fast does sound travel in air?

• 500m/s

• 1500m/s

• 340m/s

• 5000m/s

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Have a guess from what you have just seen in the clip.

What is the relationship between, the distance between the particles and the speed of which sound travels?

Choose 2 answers.

Sound travels though solids faster because

• they have less distance between each particle

• the particles have more distance between each particle

• its easier for vibrations to hit the next particle

• it is harder for vibrations to hit the next particle

Sound travels faster in

• less dense substances

• more dense substances

Particles have more energy when

• the temperature decreases

• the temperture increases

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When temperature increases the kinetic energy of the particles also

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If particles have more kinetic energy then they can transmit sound

Why does sound travel faster at sea level compared to higher altitude on a mountain top?

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As speed​ (a)   , wavelength ​ (b)  

• increases
• decreases

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Can you think of an easy experiment you could do to measure the speed of sound?

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