Worksheets and No Prep Teaching Resources
Worksheets and No Prep Teaching Resources
Reading Comprehension Worksheets
How Things Work
How Does a Cell Phone Work?

How Things Work
How Things Work


How Does a Cell Phone Work?
Print How Does a Cell Phone Work? Reading Comprehension


Reading Level
     edHelper's suggested reading level:   grades 7 to 9
     Flesch-Kincaid grade level:   8.07

Vocabulary
     challenging words:    smartphones, analog, wireless, cellular, high-tech, happening, files, restriction, download, honeycomb, adjacent, convert, advance, destination, power, access
     content words:    Systems Identification Code


How Does a Cell Phone Work?
By Sharon Fabian
  

1     How does a cell phone work? It works more like a radio than an older land line telephone - a high-tech, up-to-date radio.
 
2     Radio technology has been around for a long time - at least since the late 1800s. Radios send signals by means of electromagnetic waves. There's nothing new about sending messages by radio signals. However, having millions of people talk on cell phones at one time is new, and cellular technology is what made that possible.
 
3     Cellular technology is an efficient method of sending radio signals. With cellular technology, it is easy to send many, many signals at the same time. That is why millions of people can all be talking on their cell phones at any given moment.
 
4     The name "cellular" refers to cells, or small sections like the parts of a honeycomb. In cellular technology, an area of land, such as a city, is divided into many areas of about ten square miles each which are called cells.
 
5     Each cell has its own cell tower and radio equipment to send and receive messages. Each cell also has a certain number of radio frequencies assigned to it. Since cell phones only need to use low power radio equipment, the same radio frequencies can be used over and over in different cells. The only restriction is that the same frequencies cannot be used in adjacent cells.

Paragraphs 6 to 12:
For the complete story with questions: click here for printable



Weekly Reading Books

          Create Weekly Reading Books

Prepare for an entire week at once!


Feedback on How Does a Cell Phone Work?
Leave your feedback on How Does a Cell Phone Work?  (use this link if you found an error in the story)



How Things Work
             How Things Work


Science
             Science


    Careers in Science  
 
    Caring for Earth  
 
    Clouds  
 
    Dinosaurs  
 
    Earth's Land  
 
    Earth  
 
    Earthquakes  
 
    Electricity  
 
    Energy  
 
    Erosion  
 
    Food Pyramid  
 
    Food Webs and Food Chain  
 
    Forces and Motion  
 
    Fossils  
 
    Health and Nutrition  
 
    How Things Work  
 
    Landforms  
 
    Life Science  
 
    Light  
 
    Magnets  
 
    Matter  
 
 
    Moon  
 
    Natural Disasters  
 
    Photosynthesis  
 
    Plant and Animal Cells  
 
    Plants  
 
    Rocks and Minerals  
 
    Science Process Skills  
 
    Scientific Notation  
 
    Seasons  
 
    Simple Machines  
 
    Soil  
 
    Solar System  
 
    Sound  
 
    Space and Stars  
 
    Sun  
 
    Tsunami  
 
    Volcanoes  
 
    Water Cycle  
 
    Water  
 
    Weather  
 



Copyright © 2017 edHelper