Level: K DRA: 20 Science Strategy: Summarize Word Count: 549 3.4.19 Build Vocabulary HOUGHTON MIFFLIN Online Leveled Books ISBN-13: 978-0-547-02159-1 ISBN-10: 0-547-02159-3 1032052 H O UG H T O N M IF F L IN by Lisa C. Moran PHOTOGRAPHY CREDITS: Cover Carolyn A. McKeone /Photo Researchers, Inc. 1 Tom McHugh/Photo Researchers, Inc. 2 Alvin E. Staffan/Photo Researchers, Inc. 3 Alvin E. Staffan/Photo Researchers, Inc. 4 © JUERGEN & CHRISTINE SOHNS/ Animals Animals-Earth Scenes. 5 © JUERGEN & CHRISTINE SOHNS/Animals Animals-Earth Scenes. 6 Tom McHugh/Photo Researchers, Inc. 7 Tom McHugh/Photo Researchers, Inc. 8 STEPHEN DALTON/Minden Pictures. 9 Carolyn A. McKeone/ Photo Researchers, Inc. 10 © George Steinmetz/CORBIS. Copyright © by Houghton Mifflin Harcourt Publishing Company All rights reserved. No part of this work may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying or recording, or by any information storage and retrieval system, without the prior written permission of the copyright owner unless such copying is expressly permitted by federal copyright law. Requests for permission to make copies of any part of the work should be addressed to Houghton Mifflin Harcourt School Publishers, Attn: Permissions, 6277 Sea Harbor Drive, Orlando, Florida 32887-6777. Printed in China ISBN-13: 978-0-547-02159-1 ISBN-10: 0-547-02159-3 1 2 3 4 5 6 7 8 0940 18 17 16 15 14 13 12 11 If you have received these materials as examination copies free of charge, Houghton Mifflin Harcourt School Publishers retains title to the materials and they may not be resold. Resale of examination copies is strictly prohibited. Possession of this publication in print format does not entitle users to convert this publication, or any portion of it, into electronic format. Introduction Mice live all over the world. Mice can live in the frozen cold of the Arctic. They can live in the fiery heat of the desert. Mice are tiny, but they are als