Adaptations Lessons 4 4––6 6 CXECA08ARD303_LLR_CVb.indd 3 2/23/06 3:47:19 PM Copyright © by Harcourt, Inc. All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Requests for permission to make copies of any part of the work should be addressed to School Permissions and Copyrights, Harcourt, Inc., 6277 Sea Harbor Drive, Orlando, Florida 32887-6777. Fax: 407-345-2418. HARCOURT and the Harcourt Logo are trademarks of Harcourt, Inc., registered in the United States of America and/or other jurisdictions. Printed in the United States of America ISBN-13: 978-0-15-349166-5 ISBN-10: 0-15-349166-3 1 2 3 4 5 6 7 8 9 10 179 15 14 13 12 11 10 09 08 07 06 If you have received these materials as examination copies free of charge, Harcourt School Publishers retains title to the materials and they may not be resold. Resale of examination copies is strictly prohibited and is illegal. Possession of this publication in print format does not entitle users to convert this publication, or any portion of it, into electronic format. CXECA08ARD303_LLR_CVb.indd 4 2/23/06 3:47:22 PM Adaptations Lessons 4–6 Lesson 4 How Do Living Things Change Environments? . . . . . . . . . . . . . . . . . . . . . . 2 Lesson 5 How Do Changes to Environments Affect Living Things?. . . . . . . . . . . . . . . . . 8 Lesson 6 How Have Living Things Changed over Time? . . . . . . . . . . . . . . . . . . . . . . . . 14 Visit The Learning Site! www.harcourtschool.com CXECA08ARD3034-6_BLR.indd 1 2/23/06 3:52:23 PM 4 VOCABULARY pollution How Do Living Things Change Environments? 2 CXECA08ARD3034-6_BLR.indd 2 2/23/06 3:52:23 PM Pollution is harmful to the environment. An oil spill is one kind of pollution. 3 CXECA08ARD3034-6_BLR.indd 3 2/23/06 3:52:24 PM READING FOCUS SKILL SEQUENCE Whe