The Magic School Bus Inside the Earth

The Magic School Bus Inside the Earth

The ant monitor?! Is it always line this in Ms. Frizzle's class? You'll get used to it.

In Ms. Frizzle's class, we had been learning about animals' homes for almost a month.We were pretty tired of it.So everyone was happy when Ms. Frizzle announced."Today we start something new."

Something new. Thank goodness! Get off！

"We are going to study about our earth!" said Ms. Frizzle.She put us to work writing reports about earth science."And for homework," she said, "each person must find a rock and bring it to school."

Don't you often wonder what is inside the earth? Not often.

But the next day, almost everyone had some excuse.

I couldn't find any rocks. I found one, but my dog ate it. Your dog ate a rock?

Only four people had done the homework.And Phil was the only one who had found a real rock.

That's not a rock! It is too a rock! It's part of old 7-up bottle.

You chipped this off the sidewalk, didn't you, Wanda?

"I guess we'll have to go on a field trip and collect rocks," said Ms. Frizzle.

Arnold, that looks like Styrofoam to me. Yeah, covered with dirt.

It could be a stale cupcake. You actually touched this, Arnold?

You never know what will happen on a trip with Ms. Frizzle.Her new dress was a trip in itself.At first the old school bus wouldn't start. But finally we were on our way.

I can't believe Ms. Frizzle dresses like that. You'll get used to it.

When we came to the field, all the kids wanted to get out of the bus.But suddenly, the bus began to spin like a top.That sort of thing doesn't happen on most class trips.

Fasten those seat belts, children. I'm getting dizzy.

Ms. Frizzle, when can we collect rocks?

When the spinning finally stopped, some things had changed.We all had on new clothes. The bus had turned into a steam shovel.And there were shovels and picks for every kid in the class."Start digging!" yelled Ms. Frizzle.And we began making a huge hole right in the middle of the field.

This isn't exactly easy. At least we're missing spelling.

First, we will dig through the earth's crust.The top layer of the crust is soil. It looks like dirt to me.

Dirt is another word for soil. Oh, Grate! Now she can read my mind!

Before long - CLUNK! - We hit rock. The Friz handed out jackhammers.We began to break through the hard rock.

I'm not used to Ms. Frizzle yet! Give it time.

"Hey, these rocks have stripes," said a kid.Ms. Frizzle explained that each stripe was a different kind of rock.

Millions of years ago, these rocks were formed in layers.

This tan rock is called sandstone. This gray stripe is shale.

This white rock is limestone. Layers - Hmmm, like a cake. Don't try to eat it!

We chipped off pieces of the rocks for our class rock collection."These rocks are called sedimentary rocks, class," said Ms. Frizzle.There are often fossils in sedimentary rocks."

Sandstone is made of grains of sand all pressed together.

Sandstone feels grainy. Shale is made of mud and clay all pressed together.

This shale has a fossil of a leaf in it.

This limestone has a fossil of a seashell in it.

That's because limestone is made of shells all pressed together.

Millions of years ago, there was a sea here.

Wouldn't you know it?Just when we were finding lots of fossils, Ms. Frizzle said, "Back on the bus, kids."Then, as we were driving along, we heard rock crumbling underneath us.Down we went. Everything was pitch black. And we were falling, falling, falling!

I'll never get used to this.

Class, we're now going deeper into the earth.

I'd rather be going back to school. (I can't believe I said that!) We're falling! Help! Waa-

We landed with a bump. Ms. Frizzle switched on the headlights.We had fallen through a hole into a huge limestone cave."Rain water has been dripping down through the earth for ages," said Ms. Frizzle."The water wore away this cave in the rock."

This whole cave is made of limestone. Can you find more fossils here?

Here's one, Ms. Frizzle. Knock it off!

We wanted to stay for a while, but suddenly, the bus sprouted a drill.It started boring through the rock.Frizzie shouted, "Follow that bus!" And down we went.

Look! A stalagmite growing from the ground...

And a stalactite hanging from the ceiling!

The farther down we went, the hotter it got. The rocks were harder, too."These are rocks that were changed from one kind to another kind by heat and pressure," explained The Friz."Rocks that were changed are called metamorphic rocks."

I didn't know rocks could change. It takes millions of years.

This beautiful marble used to be limestone. They make statues out of marble.

This rock used to be shale. It was changed to slate.

Slate is harder than shale. This rock is very hard. Cut it out!

We went down even farther toward the center of the earth.We hit rock that was formed billions of years agofrom a pool of melted rock under the earth's surface.Rock like this is called igneous rock.

This igneous rock is called granite. Many buildings and monuments are made of granite.

Arnold, will you carry these samples? Earth science is heavy man.

We had dug all the way through the earth's crust.It was so hot now that Ms. Frizzle told us to get back in the bus.

We're lucky the bus is air-conditioned. What is your favorite rock? Rock 'N' roll!

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