Kenneth Walsh - Our Earth

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123

TCM 14631

Whats 4.65 billion years old

and is made mostly of water?

Its Earth, of course! Learn

about our home planets

atmosphere, and dig through

Earths layers to nd out how

it was formed.

Level 2.6

Word Count: 581

Reading Level Correlations:

Early Intervention Level 20

Guided Reading Level L

DRA Level 28

Lexile 630L

Our Earth

Our Earth

Kenneth Walsh

Image Credits

Cover narvikk/iStockphoto; p.4 Tong Chen/Dreamstime.com; p.5 top: Graeme Black/Shutterstock;

p.5 bottom: Anat-oli/Shutterstock; p.7 rangizzz/Shutterstock; p.8 hddigital/Shutterstock;

p.9 top: NASA/www.JSC Digital Image Collection; p.9 bottom: Sigapo/Shutterstock; p.10 Mark

Schwettmann/Shutterstock; p.11 Volodymyr Goinyk/Shutterstock; p.12 Arand/iStockphoto; p.13 top:

princessdlaf/iStockphoto; p.13 middle: Maresol/Shutterstock; p.13 bottom: Bill Kennedy/Shutterstock;

p.14 Xaviarnau/iStockphoto; p.17 Orientaly/Shutterstock; p.18 Dmitriy Eremenkov/Shutterstock; p.19

Rick Nease-Illustrator/TFK; p.21 top: Kristijan Zontar/Shutterstock; p.21 bottom: crydo/Shutterstock; p.22

Bychkov Kirill Alexandrovich/Shutterstock; p.23 top Pecold/Shutterstock; p23 bottom: oksix/Shutterstock;

p.24 Elena Elisseeva/Shutterstock; p.25 top: Vera Kailova/Shutterstock; p.25 left: Andy Z./Shutterstock;

p.25 right: akiyoko/Shutterstock; p.26 Computer Earth/Shutterstock; p.27 hironai/Shutterstock;

p.28 YASAR/Shutterstock; back cover: Computer Earth/Shutterstock; background: s_oleg/Shutterstock;

basketman23/Shutterstock

Based on writing from TIME For Kids.

TIME For Kids and the TIME For Kids logo are registered trademarks of TIME Inc.

Used under license.

Consultant

Timothy Rasinski, Ph.D.

Kent State University

Publishing Credits

Dona Herweck Rice, Editor-in-Chief

Robin Erickson, Production Director

Lee Aucoin, Creative Director

Conni Medina, M.A.Ed., Editorial Director

Jamey Acosta, Editor

Stephanie Reid, Photo Editor

Rachelle Cracchiolo, M.S.Ed., Publisher

Teacher Created Materials

5301 Oceanus Drive

Huntington Beach, CA 92649-1030

http://www.tcmpub.com

ISBN 978-1-4333-3631-7

2012 Teacher Created Materials, Inc.

Synched Read-Along Version by:

Triangle Interactive LLC

PO Box 573

Prior Lake, MN 55372

ISBN-13: 978-1-68444-799-2 (e-book)

Table of Contents

A Big and Mighty Planet ........................

The Big, Blue Marble ..............................

Water, Water Everywhere .....................

Earths Atmosphere ...............................

Inside the Earth .....................................

Earth History ..........................................

Glossary ................................................... 28

A Big and Mighty Planet

Have you ever played in the dirt?

Maybe it was warm and sandy and you

let it sift through your fingers.

Maybe it was cool and muddy and

you shaped it like clay.

Either way, you did something pretty

amazing. You held one small part of a

big and mighty planet in your hands.

You held part of our planet, Earth.

The Big, Blue Marble

Earth is part of our solar system .

That means it is one of eight planets that

orbit our sun. Earth is the third planet

from the sun.

From Sun to Earth

How far is Earth from the sun?

92,897,000 miles!

Something orbits Earth, too. It is

our moon.

People say that from the moon,

Earth looks like a big, blue marble.

In Orbit

To orbit means to move

in the path of a circle or

oval around an object.

Earth moves about

45,000 miles per hour!

Water, Water Everywhere

Why does Earth look blue from

space? The reason is there is much

more water than land on Earths

surface.

Water covers 70% of Earths surface.

Most of that water is in oceans. A small

part is in lakes and rivers or frozen in

glaciers and ice caps at Earths north and

south poles.

Glaciers

A glacier is a large body of ice

that spreads across an area of

land or moves slowly down a

hill or valley.

Water is important on Earth. Earth

is the only planet in our solar system that

holds living things, and every living thing

needs water.

Life on Other Planets?

Other planets have water, but they do not

have everything else that is needed for life,

such as comfortable temperatures and

good air to breathe.

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