| Chapter One: | Planetary System |
| Chapter Two: | Mountains and Plains |
| Chapter Three: | Sunshine and Rain |
| Chapter Four: | Life Begins |
| Chapter Five: | Water Plants |
| Chapter Six: | Animals that Swim |
| Chapter Seven: | The Underwater World |
| Chapter Eight: | Land Plants |
| Chapter Nine: | Land Animals |
| Chapter Ten: | Ecologies on Land |