Cell Phones

Science Encyclopedia for Kids

Cell Phones are Everywhere!

How many people do you know who have a cell phone? Do you have one? When you go to the store or the shopping mall, you'll probably see numerous people with cell phones at their ear, talking to family or friends. Cellular is the long word for cell. Sometimes, people call cell phones mobile phones. As popular as cell phones are now, almost no one owned them until the 1990s. Prior …

1 minute read

Cellular Networks

Cellular describes the network of towers that divide a region into different areas called cells. If you are moving while talking on a cell phone, your call is passed from one cell tower to another. With the popularity of cell phones, you might wonder if truck drivers still use CB (citizens band) radios. The answer is yes! Most truck drivers do carry cell phones, but there are still man…

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Is It a Radio or Telephone?

Did you know that a cell phone is as similar to a small radio as it is to a telephone? The telephone was invented in 1876 by an American named Alexander Graham Bell. Until cell phones came along, all telephones required a series of wires for you to make a call. We call this type of phone a landline. Wires from a landline connect the telephone to a wall. Another wire outside of the wall connects t…

2 minute read

Vibrations and Digits

In the past, when mobile phones were attached to cars, and very few people owned them, they used a system called analog. An analog system transforms a voice into electric vibrations or waves that are sent by a transmitter or tower and then picked up by an antenna. Through the antenna, the vibrations are then turned back into a voice that the person receiving the call can hear. With an analo…

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Parts of a Cell phone

Every cell phone company produces different types of phones with different features. Customers choose the cell phone with the features, such as text messaging or GPS (Global Positioning System), that they will use. All cell phones have many of the same parts. The circuit board inside of a cell phone has several computer chips and a microprocessor that allows you to send and receive calls. …

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More Than a Phone

How many things can a cell phone do? In the past, you could only do two things with a telephone: make calls or receive calls. But today's cell phones can perform many of the same tasks that a computer can. Many phones have cameras in them. You can take and keep photos which can then be downloaded and printed. Some phones can even record and save videos! Some phones l…

2 minute read

Cell Phone Do's and Don'ts

Do you know the word etiquette? It means the rules for being polite. Since cell phones have become so popular, we need to be especially careful to use cell phone etiquette, to insure that we aren't disturbing other people when we're using a cell phone. DON'T bother other people with your calls. Either leave and go somewhere private, or keep your voice down. Be care…

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Turn It Off!

Have you ever seen a sign in a doctor's office or a hospital saying no cell phones can be used there? There are many places where cell phones don't belong, including, government offices, schools and library's. Please be respectful of this. If you've been on an airplane, have you heard the flight attendant announce that all cell phones must be turned off before ta…

1 minute read


analog (AN-uh-log): a system that uses electric vibrations or waves rather than numbers to send information antenna (an-TEN-uh): the part of the cell phone or cell phone tower that sends and receives the signals for a call battery (BAT- uh -ree): the part inside the cell phone that provides the electricity that powers it cell (SEL): each of the parts that are connected within a cellular system an…

1 minute read

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