The document summarizes the invention of the telephone by Alexander Bell and how it has changed since. It describes how Bell's original telephone worked by transmitting sound signals through wires to be heard on another phone. Phones have since become wireless and mobile, and phone numbers now contain seven digits instead of three to accommodate more subscribers. Bell's invention of the telephone fundamentally changed communication around the world.

1. How was the Phone Invented

2. The phone was invented by Alexander Bell. It was invented by talking into a mouth piece, which goes into a transmitter which makes a signal, that vibrates down a wire,

3. which sends the signal through another transmitter which changes it back to sound which comes out a small earphone

4. What Changes has there Been since the First Phone

5. The phone has developed a lot since the first phone was created by Alexander Bell. Now the phone can be carried away from the transmitter at the wall making them wireless and easy to have private conversations

6. The phone only used to have three digits in a phone number, but now we have seven digits because the phone has become more common and more phone numbers have been needed because there are more subscribers. Alexander Bell’s invention has changed the world for ever.

7. Produced by Daniel and Joseph Researched by Wikipedia Wikianswers The book: The top 10 inventions that changed the world. Wrote on the program Animation on Microsoft PowerPoint 2003