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| Question | Answer |
| Module 5.3 Sound Energy |
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| What is Sound? | Sound is a type of energy produced by vibrations. |
| What happens when you pluck a string on the guitar? | You start the string vibrating. The vibrating string pushes on nearby air particles. |
| What is A Mexican wave? |
A flow of energy around a stadium.
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Giphy (binary/octet-stream)
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| How is sound produced from your mouth? | The folds of your skin making up your vocal cords vibrate when air form the lungs pushes through them. |
| How is sound produced from a trumpet? | The vibrating limbs of a trumpet player make the air inside the trumpet vibrate. |
| How is a sound produced from a drum? | When the skin of a drum is hit. |
| Explain the kinetic energy in air particles. | This kinetic energy in the particle is transferred from air particle to air particle as a sound wave travels. |
| What is an echo ? | An echo is a reflected sound. |
| What is acoustics? | Acoustics is the science of sound |
| What is the speed that sound travels in? | 340m/s |
| How fast does sound travel in gas at 20°C? | 343m/s |
| How fast does sound travel in liquid at 25°C? | 2439m/s |
| How fast does sound travel in Iron? | 5130m/s |
| Why does sound travel faster in a solid? | Sound travels faster in a solid than through gas, because the particles in the solid are spaced much more closely. |
| What is a pitch? | Pitch of a sound depends upon how quickly the particles vibrate, the higher the pitch of the sound. |
| What is frequency? | The number of waves that travel past a given point per second is called the frequency. |
| What is a wavelength? | A high-pitched s=ound has a higher frequency than a low deep-pitched sound has a higher frequency than a low, deep pitched-sound. |
| What is frequency measured in? | Hertz (Hz) |
| What is Loudness measured in? | Decibels (dB) |
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