radio waves

3 interesting facts:

1.)  radio waves are electromagnetic waves propagated by an antenna

2.) when you listen to the radio  the stations like 94.5 it really means that you're listening on an fm signal of 94.5 megahertz

3.) radio waves are used for the radio, television, and telephones

2 things that i have learned from another source:

1.) Megahertz means  millions of cycles per second, so if the station is at 91.5 megahertz that means the frequency is 91,500,000 cycles per second

2.) When your listening to the radio and the station is Fm it's measured in megahertz, and when you're listening to Am it's measured in kilohertz.

My opinion:  I think that this information is pretty interesting because radio waves are the reason we can watch television or listen to music on the radio.  Also, radio waves are the reason we can talk on the telephone.  Life would be really different if we couldn't go home after school and watch t.v. or call our friends on the phone whenever we want.

http://www.howstuffworks.com/radio-spectrum.htm