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Book 23, Question 141 · Video

Why Do Phones Need Airplane Mode on a Plane?

Video · 2:07 · Crafty Clover explains, from A Million Whys Book 23

Phones talk to towers with radio signals. On a plane, those signals can cause trouble. So we switch on airplane mode! Airplane mode saves battery, too.

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What Crafty Clover says in this video

Intro

Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. Why do phones need airplane mode on a plane?

The Big Idea

Phones talk to towers with radio signals. On a plane, those signals can cause trouble. So we switch on airplane mode!

Phone Radios

Step one: phone radios. A phone has radios that send and receive signals to talk to cell towers. Airplane mode turns those radios off, so the phone stops sending signals.

Up in the Air

Step two: up in the air. High in the sky, a phone could try to reach many cell towers at the same time. Its radio signals could also interfere with equipment the pilots use.

Follow the Crew

Step three: follow the crew. Rules are different in different countries, so always do what the flight crew says. Many planes offer Wi-Fi, which you can use with airplane mode still on.

A Closer Look

Let's take a closer look! Cell signals reach towers. Airplane mode turns them off. Plane Wi-Fi can still work. The battery lasts longer.

Quick Facts

Quick facts! Airplane mode saves battery, too. A phone is like a tiny radio station. Wi-Fi can work while airplane mode is on. On a plane, always follow what the crew says.

Think Like a Scientist

Now, think like a scientist! Ask a grown-up if you can turn on airplane mode on their phone. Try to make a call, send a message, or open a map. Notice which things stop working and which still work. Then turn airplane mode off again. Write down what you notice, and share it with a grown-up.

Outro

Airplane mode turns off a phone's radios, so it does not send or receive signals that could bother the plane's equipment. Remember to always follow what the flight crew says, because they keep everyone safe. Science is amazing! What will you discover next? Every question is a new adventure, so keep wondering and keep exploring with me! Next time you fly, help a grown-up switch on airplane mode before takeoff, and watch for the safety signs. Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!

Why I wrote this