Sound Wave Experiment
You'll need a few items that I'm sure you can easily find around the house -- the affiliate links in our list will give you a quick description of each item:
Pull tightly so that the spoon hangs in the center of the yarn/string and you have two long pieces of approximately equal length.
Take each string and wrap them around your pointer finger on each hand.
Then push the string against each ear (not into the ear but just outside like you are going to plug your ears because you don't want to hear something)
You'll want the spoon to hang just below the waist once both ends of the yarn are placed near the ears.
Once the string in pushed against the ears, have someone GENTLY hit the ruler against the round part of the spoon -- and watch the look on your child's face.
Pretty cool!
Here's what's really happening during the activity --
When the ruler hits the spoon, it creates vibrations which make sound
waves. These sound waves travel up the yarn/string and to the ear
instead of just spreading out into the air around you. The yarn acts as a
conductor -- an object that allows sound waves to travel.
Depending on the size of the spoon and the length of yarn, the sound will appear higher (like a church bell) or deeper (like a gong).
And because the yarn allows the sound waves to continue to travel, the sound of the spoon will resonate or reverberate -- meaning they will continue for a while after you have hit the spoon.
Another thing we found was that the only one who can hear the bell or gong sound will be the person with the string near their ears -- which we thought was also pretty cool. Everyone else in the room will just hear a faint 'tink' when the ruler hits the spoon.
Taken from
https://www.kcedventures.com/blog/the-science-of-sound-waves-an-awesome-experiment-for-kids
You'll need a few items that I'm sure you can easily find around the house -- the affiliate links in our list will give you a quick description of each item:
- A ruler (we found a wooden or heavy plastic ruler worked best)
- Two different size spoons (try using a teaspoon and a serving spoon)
- About 4 feet of string or yarn (this will depend on how tall you are as you can see below)
Pull tightly so that the spoon hangs in the center of the yarn/string and you have two long pieces of approximately equal length.
Take each string and wrap them around your pointer finger on each hand.
Then push the string against each ear (not into the ear but just outside like you are going to plug your ears because you don't want to hear something)
You'll want the spoon to hang just below the waist once both ends of the yarn are placed near the ears.
Once the string in pushed against the ears, have someone GENTLY hit the ruler against the round part of the spoon -- and watch the look on your child's face.
Warning: Kids often think that the HARDER they hit the spoon, the louder the sound -- be sure to test out this theory too!
If you are using a small spoon, you should hear a distinct bell sound -- with a larger spoon, it will sound more like a gong.Pretty cool!
The Science Behind the Sound Wave Experiment
Here's what's really happening during the activity --
When the ruler hits the spoon, it creates vibrations which make sound
waves. These sound waves travel up the yarn/string and to the ear
instead of just spreading out into the air around you. The yarn acts as a
conductor -- an object that allows sound waves to travel.
Depending on the size of the spoon and the length of yarn, the sound will appear higher (like a church bell) or deeper (like a gong).
And because the yarn allows the sound waves to continue to travel, the sound of the spoon will resonate or reverberate -- meaning they will continue for a while after you have hit the spoon.
Another thing we found was that the only one who can hear the bell or gong sound will be the person with the string near their ears -- which we thought was also pretty cool. Everyone else in the room will just hear a faint 'tink' when the ruler hits the spoon.
Taken from
https://www.kcedventures.com/blog/the-science-of-sound-waves-an-awesome-experiment-for-kids
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