Ch 45: Praxis Middle School Science: Historical Geology

About This Chapter

Brush up on geologic time periods, fossils and geological dating as you study for the Praxis Middle School Science exam. Our video lessons and quizzes will give you the information you need when you take the test.

Praxis Middle School Science: Historical Geology - Chapter Summary

Use this chapter's lessons to help you refresh your knowledge of the geologic timeline, theories of geological evolution and fossil preservation as you prepare for the Praxis Middle School Science test. The videos will guide you through information that will help you answer these types of exam questions:

  • Naming major eons, eras, periods and epochs in the Earth's development
  • Explaining the differences in catastrophism and uniformitarianism in geological evolution
  • Understanding numerical and relative geological dating
  • Looking at conditions conducive to fossil preservation such as hard parts, the elements and rapid burial

You'll get expert help from our instructors, who know what you need to prepare for the test. These lessons show you important concepts in historical geology and give you the practice necessary to succeed on test day.

Objectives of the Praxis Middle School Science: Historical Geology Chapter

Many states use the Praxis Middle School Science exam to assess competency in the subject for teacher certification. The exam has 125 multiple-choice questions. Topics related to historical geology are in the Earth and Space Sciences section, which contains 22 questions, or about 18% of the total.

The Praxis Middle School Science test is administered on computer. At the end of each of our lessons are quizzes with similar types of questions. These quizzes will help you assess your knowledge and also get practice taking a computer-based test.

8 Lessons in Chapter 45: Praxis Middle School Science: Historical Geology
Test your knowledge with a 30-question chapter practice test
Geologic Time Scale: Major Eons, Eras, Periods and Epochs

1. 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.

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.

Mass Extinction: Causes & Theories

3. Mass Extinction: Causes & Theories

This lesson is going to go over the largest mass extinctions to have ever occurred. You'll learn what they're called, when they happened, how many animals died, and what may have caused them.

The Cambrian Explosion: Definition & Timeline

4. The Cambrian Explosion: Definition & Timeline

The Cambrian Explosion refers to the metaphorical explosion of life that began 542 million years ago and lasted for roughly 40 million years. This lesson will cover the events that occurred during this time period.

Ice Age: Definition, History & Timeline

5. Ice Age: Definition, History & Timeline

What is an ice age and what factors interact to cause them? This lesson helps answer those questions with the help of graphics and discussion. A lesson summary and brief quiz are also included.

Numerical and Relative Geological Dating

6. Numerical and Relative Geological Dating

Don't worry, this lesson isn't about how to take a stone out to dinner. Instead, it is about how geologists and archaeologists use different techniques to figure out how old rocks and other artifacts are.

Fusion, Fission, Carbon Dating, Tracers & Imaging: Applications of Nuclear Chemistry

7. Fusion, Fission, Carbon Dating, Tracers & Imaging: Applications of Nuclear Chemistry

What can the sun do that we can't? How do carbon atoms 'date'? Are radioactive isotopes helpful in the medical field? The answers to these questions can be found in this lesson on the applications of nuclear chemistry.

Conditions of Fossil Preservation: Rapid Burial, Hard Parts & the Elements

8. Conditions of Fossil Preservation: Rapid Burial, Hard Parts & the Elements

Learn how fossils are formed and how varying conditions affect the preservation of organisms. What is the best way for a dinosaur to become fossilized? Find out here!

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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