Podcast
Questions and Answers
Why do bird seeds bounce off a drum skin when it is tapped?
Why do bird seeds bounce off a drum skin when it is tapped?
- The drum skin becomes slippery when tapped.
- The seeds are naturally bouncy.
- The drum skin is vibrating. (correct)
- The air particles push the seeds upwards.
What happens when you hold your hand over a drum and someone hits it?
What happens when you hold your hand over a drum and someone hits it?
- You can see the drum changing shape.
- You can feel the heat generated by the drum.
- You feel nothing because the air is still.
- You can feel the air above the drum vibrate. (correct)
How does the vibration from a vibrating object reach your ear?
How does the vibration from a vibrating object reach your ear?
- The vibrating object creates light waves that carry the vibration.
- The vibrating object creates a vacuum, sucking the vibration towards your ear.
- The air particles carry the vibration from one to the next until it reaches your ear. (correct)
- The vibrating object shoots the vibration directly into your ear canal.
What does your brain do when a vibration reaches your ear?
What does your brain do when a vibration reaches your ear?
Imagine a guitar string vibrating, what is the first thing that happens to propagate the sound?
Imagine a guitar string vibrating, what is the first thing that happens to propagate the sound?
If you shout in an empty room, how can you feel your voice vibrate?
If you shout in an empty room, how can you feel your voice vibrate?
Why is it impossible to hear sound in space?
Why is it impossible to hear sound in space?
Two drums of different sizes are hit with the same force. Which drum will likely produce a lower pitched sound, and why?
Two drums of different sizes are hit with the same force. Which drum will likely produce a lower pitched sound, and why?
How would the loudness of sound be affected if air particles transferred less energy when they bumped into one another?
How would the loudness of sound be affected if air particles transferred less energy when they bumped into one another?
Which material would allow you to hear sound from the furthest distance?
Which material would allow you to hear sound from the furthest distance?
Flashcards
What is vibration?
What is vibration?
Back and forth movement of an object.
How do vibrations travel?
How do vibrations travel?
Vibrations cause the particles around them to also vibrate, transferring energy.
How do we hear sound?
How do we hear sound?
When vibrations reach your ear, your brain interprets them as sound.
Study Notes
- Bird seeds will bounce off a drum skin when the drum is tapped.
- This is caused by the vibration of the drum skin.
- The air above a drum vibrates when the drum vibrates.
- When something vibrates, the air around it also vibrates.
- Vibrating objects cause the air particles next to them to vibrate.
- Air particles bump against each other, passing the vibration.
- Vibration is passed from one particle to the next until it reaches ears.
- The brain interprets this vibration as sound.
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