HOW DOES A RADIO WORK
When you hear the word radio you probably think of music and entertainment. Now you can also think of radios as sending information. There are two types of radios, one that you can listen music to, and the other that sends messages like mores code. Both of these radios use the continuous frequency of sine waves to send information, though different radio signals use different frequencies of sine waves. This makes all the sine waves separate which lets different devices tune into them.
The receiver and the transmitter are the two setup parts in a communicating type of radio. Taking a message and making it into sine wave, which is made by the negative charge electrons moving up own the antenna, and sending it with the radio sine wave is what a transmitter does. The receiver gets the wave by an antenna and finds the message in the sine wave, you can find this process in my picture that I made below. In a receiver there is an important thing that has to be there for the radio to correctly .It is a tuner, a tuner picks up one sine wave that it needs by finding the frequency of it. The musical radio has the same two setup parts, everything is the same except that the transmitter sends music and people talking, not necessarily messages. The radio that we use as a communicator and the radio that we use to listen to music are also different because they tune into different frequencies of sine waves.
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Process of sending and receiving information

Antennas
Antennas are very important to the radio. The antennas on a receiver pick up the information that the transmitter gives. The antennas on transmitters send the information that the receiver needs to pick up. The frequency of sine waves determines if the antenna is big or small. The bigger the antenna, the easier it is to receive or send sine waves with great frequency. The smaller the antenna, the harder it is to pick up or send the sine waves. Antennas are very important because without them the information would not be sent or picked up.




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Receiver picking up information


Transmitters
Transmitters are the part that sends the information and starts the process. There are different types of transmitters all over the world. As long as the device can send a message or information in a sine wave so that the receiver can pick it up, then it can be a transmitter. On a transmitter you might see an antenna. The transmitter needs an antenna to send out the information in the sine waves. Transmitters are just as important as antennas because it starts the process of communication.

Glossary
Frequency: the rate of something
Transmitter: the device that sends electrical sine waves that hold information
Receiver: the device that receives the sine waves and gets the information

Citations
Brain, Marshall. Radio Basics: The Parts. Howstuffworks.com. How stuff works, 7 December 2000. Web. 27 September, 2012.

Sinclair, Jim. How radio Signals work. New York: McGraw-Hill, 1997. Print.
Brian, Marshall. How stuff works. New York: Hungry Minds, 2001. Print.
Encyclopedia Britannica. Radiation. Encyclopedia Britannica Online School Edition.2012: page 11.Encyclopedia Britannica. Web. 27 September, 2012.
Brain, Marshall. Antenna Basics. Howstuffworks.com. How stuff works, 7 December 2000. Web. 27 September, 2012.