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Ch 9: ScienceFusion The Dynamic Earth Unit 2.4: The Geologic Time Scale

About This Chapter

The Geologic Time Scale chapter of this ScienceFusion The Dynamic Earth Companion Course helps students learn the essential lessons associated with the geologic time scale. Each of these simple and fun video lessons is about five minutes long and is sequenced to align with the Geologic Time Scale textbook chapter.

How It Works:

  • Identify the lessons in the ScienceFusion Geologic Time Scale chapter with which you need help.
  • Find the corresponding video lessons with this companion course chapter.
  • Watch fun videos that cover the geologic time scale topics you need to learn or review.
  • Complete the quizzes to test your understanding.
  • If you need additional help, rewatch the videos until you've mastered the material or submit a question for one of our instructors.

Students will learn:

  • Branches of geology
  • Geological evolution theories
  • Definitions for what eons and eras are
  • Facts about the Precambrian period
  • Events during the Paleozoic Era
  • The Mesozoic Era's timeline
  • The periods that make up the Cenozoic Era

ScienceFusion is a registered trademark of Houghton Mifflin Harcourt, which is not affiliated with Study.com.

7 Lessons in Chapter 9: ScienceFusion The Dynamic Earth Unit 2.4: The Geologic Time Scale
Test your knowledge with a 30-question chapter practice test
The Main Branches of Geology

1. The Main Branches of Geology

Although many people think the field of geology focuses solely on rocks, there is much more behind this scientific field. Geology has many different branches that each focus on interesting and unique features of our planet and beyond.

Theories of Geological Evolution: Catastrophism vs Uniformitarianism

2. Theories of Geological Evolution: Catastrophism vs Uniformitarianism

Geologists haven't always agreed about the history of our planet. They have debated between catastrophism and uniformitarianism over the last few hundred years! Learn about the two main theories of geologic evolution and how scientists came to resolve the dispute.

Geologic Time Scale: Major Eons, Eras, Periods and Epochs

3. Geologic Time Scale: Major Eons, Eras, Periods and Epochs

The geologic time scale is an essential tool for understanding the history of Earth and the evolution of life. In this lesson, explore the principal eons, eras, periods, and epochs that help us track major events in geologic history.

The Precambrian Period: Events & Facts

4. The Precambrian Period: Events & Facts

The earth as we know it today is shaped by what happened during the Precambrian period, which covers four billion years! This lesson covers the events that shaped this important period.

The Paleozoic Era: Definition, Timeline & Events

5. The Paleozoic Era: Definition, Timeline & Events

The Paleozoic Era spans almost 200 million years from 542 to 251 million years ago. It is defined by great explosion of life at the beginning of the era and ends with the largest mass extinction in the history of our planet. This lesson will cover the important features of Paleozoic Era.

The Mesozoic Era: Facts, Events & Timeline

6. The Mesozoic Era: Facts, Events & Timeline

The Mesozoic Era began 252 million years ago with the largest mass extinction in Earth's history and ended 66 million years ago with the asteroid that killed off the dinosaurs. This lesson will cover the important events that occurred during the Mesozoic Era.

The Cenozoic Era: Definition, Time Period & Facts

7. The Cenozoic Era: Definition, Time Period & Facts

The Cenozoic Era spans the previous 65 million years of Earth's history, beginning with the extinction of flightless dinosaurs and continuing up to the present. This lesson covers the events that shaped the Cenozoic Era.

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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