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Ch 42: General Science: History of Life

About This Chapter

The state of Arizona uses the AEPA General Science exam to qualify teachers for licensing. Watch the lessons in this chapter to review what you know about the origins of life on Earth, extinctions throughout history and evolution classifications.

AEPA General Science: History of Life - Chapter Summary

This chapter has been assembled to aid in your studies of the history of life on Earth, starting with theories on the origins of life and continuing with the processes of extinction and evolution. Begin your review by watching our expert instructors in this series of lesson videos as they discuss topics you may find on the AEPA General Science certification exam, including:

  • Theories and explanations for the origins of life
  • Major eras of life on Earth
  • Theories about the evolution of cells
  • Forms of evolutionary changes
  • Mass extinctions
  • Cladograms and phylogenetic trees

Along with watching these lessons, take the quizzes that accompany them to test your retention of the information presented. Then, using video tags to return to various locations of the lessons for further review. Transcripts with highlighted words are included.

AEPA General Science: History of Life Objectives

The objective of the AEPA General Science exam is to measure future science teachers' mastery of the subjects they will be teaching. To accomplish this objective, test takers are administered 150 multiple-choice questions that they must complete within three hours. Twenty-five percent of these questions will test your understanding of the life sciences and may include some questions about the history of life on Earth. Use this chapter to prepare for these questions by improving your understanding of the theories of the origins of life on our planet.

6 Lessons in Chapter 42: General Science: History of Life
Test your knowledge with a 30-question chapter practice test
The Origin of Life on Earth: Theories and Explanations

1. The Origin of Life on Earth: Theories and Explanations

Ever wonder how living things came from non-living things? We will explore what conditions on early Earth may have created life from non-living items.

The History of Life on Earth: Timeline and Characteristics of Major Eras

2. The History of Life on Earth: Timeline and Characteristics of Major Eras

The Earth is over 4 billion years old. Ever wonder what happened during certain time periods in that large amount of time? We will look at the major eons and eras of Earth's history along with important characteristics of each.

The Endosymbiosis Theory: Evolution of Cells

3. The Endosymbiosis Theory: Evolution of Cells

Ever wonder why some cells are very simple and others are complex with countless organelles to remember? We will look at how simple cells evolved to become more complex cells - as well as evidence to support this.

Evolutionary Change: Definition and Forms

4. Evolutionary Change: Definition and Forms

You've probably heard of Charles Darwin and evolution. We know that evolution is change over time, but here we will look at how these changes may have occurred during Earth's history.

What Is Extinction? - Defining Background and Mass Extinction

5. What Is Extinction? - Defining Background and Mass Extinction

In this lesson you'll discover what the term 'extinction' means as well as learn the two different types of extinction: mass extinction and background extinction. You will also discover how humans contribute to extinction events.

Cladograms and Phylogenetic Trees: Evolution Classifications

6. Cladograms and Phylogenetic Trees: Evolution Classifications

Family trees help show how people are related to each other. Similarly, scientists use cladograms and phylogenetic trees to study the relationships between organisms.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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Other Chapters

Other chapters within the AEPA General Science (NT311): Practice & Study Guide course

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