TO THE STUDENT 2
GREEN PLANTS 3
Introduction 5
Unit 1 Getting Started 6
Unit 2 The Seedling 13
Unit 3 Roots 22
Unit 4 Stems 28
Unit 5 Leaves 34
Unit 6 New Plants from Old Plants 44
Show What You Learned 48
ANIMALS 49
Introduction 51
Unit 1 Living Things Called Animals 52
Unit 2 A Look at the Animal Kingdom 57
Unit 3 Different Kinds of Bodies 69
Unit 4 Animal Life Cycles 76
Unit 5 Animal Lifestyles 82
Unit 6 Animals in Danger 90
Show What You Learned 94
HUMAN SYSTEMS 95
Introduction 97
Unit 1 You’re Alive 98
Unit 2 Moving Parts 105
Unit 3 Staying Alive 111
Unit 4 The Movers and Removers 118
Unit 5 Systems That Control Your Body 126
Unit 6 Creating Life 133
Unit 7 Taking Care 138
Show What You Learned 140
THE FIVE SENSES 141
Introduction 143
Unit 1 The Five Senses 144
Unit 2 The Sense of Sight 149
Unit 3 The Sense of Hearing 159
Unit 4 The Sense of Smell 167
Unit 5 The Sense of Taste 173
Unit 6 The Sense of Touch 179
Show What You Learned 186
GLOSSARY 187