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Ch 44: Praxis General Science: Changing Earth's Surfaces

About This Chapter

Study this chapter to learn more about the factors that change the surfaces of the Earth. By reviewing these lessons, you will refresh your knowledge of this topic in preparation for the Praxis General Science exam.

Praxis General Science: Changing Earth's Surfaces - Chapter Summary

To help you study for the Praxis General Science test, this chapter focuses on different phenomena that impact Earth's surface. Occurrences detailed in these lessons include:

  • Weathering
  • Soil erosion
  • Continental drift
  • Plate tectonics
  • Volcanoes and earthquakes

You will be guided through this chapter by an expert instructor, who will present each in a fun, conversational manner. If you have any questions as you study the chapter, you may submit your inquiry to our subject-matter experts for assistance. When you finish the chapter, take the comprehensive exam to determine how well you understand the information you've just reviewed and to see what you need to study further.

6 Lessons in Chapter 44: Praxis General Science: Changing Earth's Surfaces
Test your knowledge with a 30-question chapter practice test
Weathering: Definition, Types, Causes & Rates

1. Weathering: Definition, Types, Causes & Rates

Ever wondered how erosion could create something as dramatic as the Grand Canyon? The simple answer is weathering. This lesson describes the three major types of weathering, their causes, and how weathering rates can change.

Soil & Erosion: Definition, Types, Causes & Prevention

2. Soil & Erosion: Definition, Types, Causes & Prevention

One of the most important things that we can do to ensure the health of our crops and nearby ecosystems is to reduce erosion. This lesson explains the relationship between soil and erosion, as well as ways to stop erosion.

Alfred Wegener's Theory of Continental Drift

3. Alfred Wegener's Theory of Continental Drift

People used to think that Earth was static, and that it never changed. Gradually, a body of evidence was gathered that made no sense in this model. Alfred Wegener, Geologic Supersleuth, laid the groundwork for a whole new theory for the large-scale changing nature of the earth.

Evidence for the Mechanism of Continental Drift

4. Evidence for the Mechanism of Continental Drift

As scientists began to explore the ocean floor after World War II, they discovered many new clues to help them solve a mystery that had begun decades earlier - how the continents moved about on the surface of the earth.

Plate Tectonics: Theory & Definition

5. Plate Tectonics: Theory & Definition

Plate tectonics describes the internal workings of our planet. Using it allows geologists to explain a wide range of geologic features and processes. You will learn the basics about the theory in this lesson.

Earthquakes and Volcanoes: Evidence of Earth's Inner Layers

6. Earthquakes and Volcanoes: Evidence of Earth's Inner Layers

The interior layers of the earth are not able to be observed directly, so scientists need to rely on other information to learn about it. S waves, P waves, and magma from volcanoes and earthquakes give a glimpse at the layers of the earth by providing data that can be built into a model of the earth.

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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