Lesson 3.7.1

Lesson 1- The Cambrian Explosion

Get Focused

During the Cambrian era, an unprecedented biological event took place called the Cambrian explosion. In this lesson we will learn about the Cambrian explosion and try to explain what caused it.

Consider the following essential questions as you complete Lesson 1:

  • When was the Cambrian era ?
  • What was the Cambrian explosion ?
  • How do scientists explain the sudden appearance of many types of animals during the Cambrian explosion


Explore

Click on the link below to explore the lesson content

Lesson 3.7.1 Content Link

Vocabulary

Below is a link to the Science 20 Glossary. Make sure you can identify and define the terms within the glossary that correspond with this lesson.

Science 20 Glossary

Read

Read pages 330 - 335 in the Science 30 Textbook. There is a text link below

Lesson 3.7.1 Text

Watch and Listen Watch and Listen

Video or multimedia content

Sci20 tut#3.7.1 Tutorial Video

 

Self Check

You Can try the questions on page 335 to test your knowledge.

Reflect and Connect

There are different explanations for the Cambrian explosion that have been proposed. Research at least two different explanations and discuss which explanation seems the best to you and why. Post your answer to the discussion forum.

Module 7 : Lesson 1 Assignment.

Once you have completed all of the learning activities for this lesson, you can complete the online assignment.

Sci20 3.7.1 online assignment

Lesson Summary

In this lesson you learned about the sudden proliferation of life that occurred during the Cambrian era and some of the theories about what caused it.

Lesson 2 will look at factors contributing to petroleum creation.