Todays Experiments

So today, we did a tele-class with Aurora Lipper. Today was on the Sonic Boom. Did anyone else get to join the tele-class? Really interesting indeed. Started off kinda blah as my kids say because well three of my kids are little ones, so they wanted to get to the fun part. Experiments. My oldest kinda got in to it, But the experiment I think was much of excitement and our kiddos, well lets say they were anxious. Lol! So what in the world is in the picture above? Why it is todays experiment of course. Lol! These experiments were made out of mostly everyday supplies. 

Todays Key Concepts: (Courtesy of Aurora Lipper)

Frequency is a measure of how many times something moves back and forth. A swing, a pendulum, a leg of a walking person all have a frequency. All those things start at one place, move, and come back to the same position that they started. This moving and coming back is one vibration. The faster something vibrates, the more frequency that something has. Frequency is measured in Hertz (Hz).

Waves are the way energy moves from place to place. Sound moves from a mouth to an ear by waves. Light moves from a light bulb to a book page to your eyes by waves. Waves are everywhere. As you sit there reading this, you are surrounded by radio waves, television waves, cell phone waves, light waves, sound waves and more. (If you happen to be reading this in a boat or a bathtub, you're surrounded by water waves as well.) There are waves everywhere!

Our ears are very good antennas. They are very effective at picking up quiet, loud, high-pitched and low-pitched sounds. It is difficult for people to make microphones that are as sensitive as our ears. Our ears can pick up and tell the difference between sounds as low-pitched as 20 Hz and as high-pitched as 20,000 Hz. Some animals can hear things that are even higher or lower pitched than that. Our ears and brain are also very good at picking out the direction a sound is coming from.

So what are the experiments we learned today? They are the following:

• A Resonance
• A Harmonica
• A Screaming Balloon

So, do you want to learn more about these experiments? Please visit the posts below as they are over up at my links blog.

To Make A Resonance, Please Visit the following link:  http://homeizcool101.blogspot.com/2011/10/experiments-2.html
To Make A Harmonica, Please Visit the following link - http://homeizcool101.blogspot.com/2011/10/experiments-part-1.html
To Make A Screaming Balloon, Please Visit the following link - http://homeizcool101.blogspot.com/2011/10/experiment-3.html