Contents

Geologic Time Scale

Introduction
What Is Biodiversity?

Chapter 1
A Short History of Life on Earth

Chapter 2
Biodiversity Everywhere

Chapter 3
Why Biodiversity Matters

Chapter 4
Biodiversity and Humans

Chapter 5
Threats to Biodiversity

Chapter 6
Protecting Biodiversity

Glossary | Metric Conversions
Resources | Essential Questions | Index

Interested in Primary Sources?

Look for this icon. Use a smartphone or tablet app to scan the QR code and explore more! Photos are also primary sources because a photograph takes a picture at the moment something happens.

Image You can find a list of URLs on the Resources page. If the QR code doesn’t work, try searching the internet with the Keyword Prompts to find other helpful sources.

Imagebiodiversity