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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: 978-0-15-349154-2 ISBN-10: 0-15-349154-X 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.
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Lif e Cycles Lessons 1–2 Life Cycle of a Cat . . . . . . . . . .2 Life Cycle of a Frog . . . . . . . . .4 Life Cycle of a Butterfly. . . . . .6 Life Cycle of a Grasshopper . .8 Animals Are Like Their Parents . . . . . . . . . . .10 Animals Are Different from Their Parents . . . . . . .12 More Animals, More Differences . . . . . . . .14 Animals and the Environment. . . . . . . . .15
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Lif e Cycle of a Cat All animals have a life cycle. A life cycle is all the times of the animal’s life. This is a cat’s life cycle. kitten about 3 weeks old adult cat and kittens 2
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A kitten grows to be an adult. The adult has its own young. A new life cycle begins. young cat about 6 months old adult cat 3
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Lif e Cycle of a Frog This is a frog’s life cycle. Mother frogs lay eggs. Young frogs, or tadpoles, hatch from eggs. frog eggs tadpole 4
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The tadpole grows and changes. It becomes a fully grown frog. Then it can have young. A new life cycle begins. growing tadpole frog 5
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Lif e Cycle of a Butterfly This is a butterfly’s life cycle. A butterfly begins life as an egg. A larva, or caterpillar, hatches from the egg. The larva becomes a pupa. egg larva 6
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adult butterfly The pupa makes a hard covering.The pupa makes a hard covering. It changes inside the covering. A butterfly comes out of the covering. The butterfly can have its own young. butterfly coming out pupa 7
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Lif e Cycle of a Grasshopper This is a grasshopper’s life cycle. A grasshopper begins life as an egg. The young grasshopper, or nymph, hatches. The nymph does not have wings. grasshopper eggs nymph 8
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The nymph gets bigger. Wings grow. The grasshopper becomes an adult. It has young. A new life cycle can begin. adult grasshopper 9
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Animals Are Like Their Parents Animals have young that are like them. Young animals look like their parents. The way they look is their appearance. This young dolphin is like its parent. 10
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Young animals act like their parents. They eat the same kinds of foods. They move in the same way. The young giraffe is like its parent. 11
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Animals Are Dif f erent from Their Parents Animals are not just like their parents. They may look a little different. They may act a little different. Young cows are not just like their parents. cows 12
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Yorkshire terrier poodle puppies Animals have two parents. The parents may be very different. The young may be like both parents. Or, they may be more like just one parent. 13
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More Animals, More Dif f erences Koi Animals of one kind may live in a group. There may be many parents and young. So, the animals may look very different. The more animals there are, the more differences. 14
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Animals and the Environment Arctic fox in summer Arctic fox in winter The environment affects animals. It may affect how animals look. It may affect how they act. 15
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Vocabulary adult, p. 3 appearance, p. 10 egg, p. 4 environment, p. 15 larva, p. 6 life cycle, p. 2 nymph, p. 8 pupa, p. 6 tadpole, p. 5 16
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Think About the Reading 1. What questions do you have after reading this book? 2. How can you find the answers to these questions? Hands-On Activity 1. Find a picture of an animal. 2. Draw a picture that shows what its parent might look like. School-Home Connection Tell a family member what you have read about animals. Talk with the family member about the kinds of animals you have seen.
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