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Book 12, Question 150 · Video

Why Is Earth the Only Planet We Know with Moving Plates?

Video · 1:52 · Crafty Clover explains, from A Million Whys Book 12

Earth is the only planet we know that has moving plates. Its crust is cracked into big pieces that slowly slide around. Earth has the right size, heat, and water to keep them movin

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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 is Earth the only planet we know with moving plates?

The Big Idea

Earth is the only planet we know that has moving plates. Its crust is cracked into big pieces that slowly slide around. Earth has the right size, heat, and water to keep them moving.

Venus

Step one: Venus. Venus is almost the same size as Earth, but it has no ocean. Its crust is dry and stiff, so it does not break into moving plates. It is also very hot at the surface.

Mars

Step two: Mars. Mars is smaller, so it cooled off faster, like a small cup of cocoa. Its crust stopped moving long ago.

Earth

Step three: Earth. Earth is big enough to stay hot inside, and it has plenty of water. Water makes rocks softer and slippery, so the plates keep moving.

A Closer Look

Let's take a closer look! A big planet holds its heat longer. Inner heat keeps rock slowly flowing. Water makes rocks softer and slippery. And the plates keep sliding, slowly. Scientists are still studying why Earth is special.

Quick Facts

Quick facts! Earth's plates move about as fast as your fingernails grow. Moving plates make mountains, volcanoes, and earthquakes. Scientists are still studying why Earth is special. Be curious. There is more to discover.

Think Like a Scientist

Now, think like a scientist! With a grown-up, fill a big cup and a small cup with the same warm water, not hot. Check the temperature of each after 15 minutes. Which cooled faster? That is why small planets lose heat sooner.

Outro

Earth is special, and there is still more to discover. Science is amazing! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!

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