Here you have a video that explain how life have change 
            with satellites

           
            I have found a web made by  NASA that explain very well
            how satellites work

   https://www.nasa.gov/audience/forstudents/5-8/features/nasa-knows/what-is-a-satellite-58.html
                 I hope you like it and you have learn about satellites
           
               By : Rodrigo Pintos Gómez