Tornadoes Lesson for Kids

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  • 0:04 Tornado Basics
  • 0:25 What Is a Tornado?
  • 1:09 Where Do Tornadoes Come From?
  • 2:56 Lesson Summary
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Lesson Transcript
Instructor: Elizabeth Foster

Elizabeth has been involved with tutoring since high school and has a B.A. in Classics.

Twister! Have you ever wondered where tornadoes come from or why they can cause so much damage? In this lesson, you'll learn all about these powerful storms.

Tornado Basics

In The Wizard of Oz, a tornado picks up Dorothy and Toto and puts them down safe and sound in Oz. But that's in a story. In real life, Dorothy and Toto would have been in danger, because real tornadoes are strong, violent storms. In this lesson, you'll learn where tornadoes come from and why they can be so dangerous.

What Is a Tornado?

A tornado is a rotating column of air that stretches from the clouds of a thunderstorm down to the ground. The air in a tornado is spinning around and around very fast. Air is invisible, but you can see tornadoes because the spinning air picks up dust, water, and other things from the ground.

The United States has the most tornadoes of any country in the world. Over 1,000 tornadoes strike the U.S. every year, and tornadoes have hit all 50 states. The part of the U.S. where tornadoes are most common is called Tornado Alley. Tornado Alley includes parts of Texas, Oklahoma, Kansas, and Nebraska. The Wizard of Oz got that one thing right. Dorothy's home was right in Tornado Alley.

Where Do Tornadoes Come From?

Scientists still don't understand exactly how tornadoes form. Tornadoes occur most often in the late spring and early summer, but they can strike at any time of year. Tornadoes form during thunderstorms, but because it takes special conditions for one to form, most thunderstorms never make a tornado.

Scientists think that tornadoes form when cold air meets warm air. When this happens, the cold air pushes the warm air up. Imagine how, when you go swimming, the warm water is on the top while the cold water is deeper, or how when you take a shower, the steam rises and the cold air hits your feet, making you cold.

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