Chapter 20 - Introduction

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To fully appreciate this tutorial, you should be familiar with the concepts of:
• Evolution
• Adaptive radiation
• Mass extinction
• Origin of life
• Geologic eras, in order

After this tutorial, you will be able to describe:
• The relationship of periods of epochs to eras, matching them correctly
• Major geological and biological events
• When major events occurred in geological time

How has life changed on Earth throughout geological time?

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Geological Time
Interactive Diagram
Summary

The earth is a dynamic place both geologically and biologically. Scientists have been able to assemble a history of Earth by examining rock strata and fossils. In this tutorial, we will examine the history of life on Earth relative to geological time.