Level: F DRA: 10 Science Strategy: Question Word Count: 180 1.5.24 Build Vocabulary HOUGHTON MIFFLIN Online Leveled Books by Darrel Claxton 1431855 H O UG H T O N M IF F L IN by Darrel Claxton PHOTOGRAPHY CREDITS: Cover © Hans Christoph Kappel/Minden Pictures; 1 (t) © Shutterstock, (bl) © Shutterstock, (br) © Shutterstock; 2 © Shutterstock; 3 © 2006 Hemera Technologies; 4 © Hans Christoph Kappel/ npl/Minden Pictures; 5 © Rick & Nora Bowers/Alamy; 6 (t) © Colin Keates/Dorling Kindersley, (b) © HMCo.; 7 © Shiell, Richard/Animals Animals; 8 © Design Pics Inc./Alamy; 9 © Michael Knowles/Alamy; 10 © Blickwinkel/Alamy 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: 978-0-547-42738-6 ISBN-10: 0-547-42738-7 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. All butterflies have wings. But all butterflies are not the same. What kind of butterfly do you like best? 2 No other butterfly looks anything like this one. It is named after a zebra. This butterfly lands upon a flower. 3 This butterfly’s wings turn purple when the sun sh