Sounds and vibrations

We are learning all about sounds and hearing.

Today we made an elastic guitar and we noticed that the bigger the elastic is the lower the note it makes.

The opposite is true too.  The smaller the elastic is the higher the sound it makes.

Teacher had a tuning fork.

She showed us how it makes a note and we all took turns listening the the note it makes.

Next she showed us what happens when you put the vibrating tuning fork in water.  It makes a huge splash.  We found this hard to do, but once you get good at it, it is really spectacular.

Teacher also showed us how a ping pong ball will bounce when you put a vibrating tuning fork against it.

We were able to get rice to vibrate and jump just by putting the vibrating tuning fork against the rice cup.

Finally we listened to what spoons sound like when you tap them against a table and hold their string outside your ear.  We could hear all sorts of different bells!  Again, the larger the spoon the lower the bell's note and the smaller the spoon the higher pitched the sound of the bell.