More Fun with Sounds

High and low sounds:





We cut the balloon so we could fit it easily over the wide end of the funnel.





We fastened the rubber band to help hold it into place. We took our time patting the balloon while it was lose and then stretched tighter. The sound would change from high to low. Elijah decided that it was very much like our vocal cords. ;) Gotta love experiments.





As he played around with it we found it was acting like an eardrum when we spoke close to the balloon or through the funnel. The sound waves would cause it to vibrate just like the eardrum.


Very fun and easy experiment.




We were reading about sounds that bounce back like echoes and ultrasound. Elijah thought it was very fitting we were learning this after I had just had a sonogram. ;)





With Remy's help he observed how the potential energy was converted to moving energy and how it bounced back and forth after released.

Elijah Playing With Sound

In science today we have moved on into the realm of sound. It always feels good to move on into a new unit.


We discussed how sound must have matter to travel through. Robert Boyle discovered this when he extracted the air (matter) out of an enclosed space and tried to ring a bell. The result was he couldn't hear it ring unless it had air inside.


Elijah thought this was super cool.





Eli did an experiment with a three-foot piece of string and a spoon. If you tie the string to the spoon and swing it until it bumps you can hear through the string (solid matter) and the second sound of the bell sound through the air (gas matter).

Happy experimenting!

Sound Waves to an Ear Drum

In science Remy is learning about the ear and how sounds vibrate into his ear and hit his "drum". With the help of his brother he plucked his rubber band, heard the sounds waves, and then he saw the sound waves rustle the paper. :)