The zipper is a wonderful invention. They are very common so we forget that they are wonderful. They are strong, but they open and close very easily. They come in many colors and sizes. In the 1810s, people in the USA wore high shoes and clothes with a long row of buttons. It was hard for them to wear anything. They wanted an easier way to put on and take off clothes. Whitcomb Judson invented the first zipper in 1839. He called it a slide fastener. A zipper has three parts. There are dozens of metal or plastic teeth in two rows. These are fastened to two flexible strips of cloth. A fastener slides along and fastens the teeth together. When it slides the other way, it takes the teeth apart.                                                                                                                                            TRUE / FALSE 1.      The people in the USA have used zippers since 1810s.                                  2.      Zippers are hard for us to wear anything.                                                     3.      Whitcomb Judson was the first zipper inventor.                                                          4.       Zippers are only made of metal.