Cone of Sound

Today I was playing with sound experiments, and had so much fun with this one that I thought I would share it.  It is based on the original phonographs, which used a very similar setup to play recordings of music or voices.  They used a large cone to increase the volume of the sound.

Catching Money

This experiment is one that I was reminded of while presenting a teacher workshop on hands-on science in the classroom. We were going over some of the easy, spur of the moment things that you can do for science, and one of the teachers reminded me of this one. It is fun and a bit amazing too.

Cat Wiggles

If you have ever watched a cat preparing to pounce on its favorite toy, you may have seen it wiggle its back legs from side to side just before it leaps. Why do they do that? It would seem that the movement would alert their prey, so there has to be a good reason for the behavior. To understand that, we need to learn a bit about muscles and tendons.