Ch 18: MEGA General Science: Earth History & Structure

About This Chapter

Follow along as our instructors share important Earth history and structure information that you can draw upon during the MEGA General Science test. Try out our lesson quizzes before the exam and track your progress via the dashboard.

MEGA General Science: Earth History & Structure - Chapter Summary

In these lessons, Study.com provides you with the information you need to know about the Earth's history and structure. Apply this knowledge when you're taking the MEGA General Science test. These lessons include topics that may be on the exam, such as:

  • Theories about the Earth's formation
  • Tectonic plate movement
  • The rock cycle
  • Internal and external forces shaping the Earth's surface
  • The impact of transportation infrastructure on ecosystems
  • Materials of the Earth
  • Fossils, geothermal energy and fossil fuels
  • Glaciation and glacial deposition
  • The geologic time scale
  • Natural resources and their allocation
  • Missouri's natural resources

The lessons in this chapter will help you prepare for the MEGA General Science test. By the end of this chapter, you will be ready to answer questions about the Earth's history and structure on the exam. Follow engaging video lessons to brush up on the topic, take quizzes for extra practice and submit questions to the experts for clarification.

15 Lessons in Chapter 18: MEGA General Science: Earth History & Structure
Test your knowledge with a 30-question chapter practice test
Formation of the Earth: Theories

1. Formation of the Earth: Theories

In this lesson, the theory of how the planet Earth formed will be discussed. This includes looking at how it differentiated into three layers, how it formed its atmosphere, water, and land features, and how it continues to evolve today.

Causes of Tectonic Plate Movement

2. Causes of Tectonic Plate Movement

In this lesson, we explore the causes of plate movement, including thermal convection, ridge push and slab pull. Students will learn how these processes complement each other and form a theory for tectonic plate movement.

Rock Cycle: Igneous, Sedimentary, and Metamorphic Rocks

3. Rock Cycle: Igneous, Sedimentary, and Metamorphic Rocks

In this lesson, we will discuss the three main types of rocks and how they are formed. The lesson also gives an introduction into how matter locked in rocks can be cycled through the earth.

The Dynamic Earth: Internal & External Forces that Shape Earth's Surface

4. The Dynamic Earth: Internal & External Forces that Shape Earth's Surface

There are many geologic processes that shape the surface of the Earth. Not only do they build and destroy a variety of landscapes, but they also give us clues to the interior of the Earth and the forces that exist there.

From Highways to Canals: How Transportation Infrastructure Affects Ecosystems

5. From Highways to Canals: How Transportation Infrastructure Affects Ecosystems

What type of transportation do you use to get around? We use a variety of methods of transportation that all require some form of infrastructure. In this lesson, we will discuss how transportation infrastructure affects the ecosystems.

Earth's Materials: Minerals, Rocks, Soil & Water

6. Earth's Materials: Minerals, Rocks, Soil & Water

Although the earth is a very complex system, there are only four main components of Earth that are the building blocks of life. These components are referred to as Earth's materials and include minerals, rocks, soil and water.

Fossil: Definition, Types, Characteristics & Examples

7. Fossil: Definition, Types, Characteristics & Examples

Fossils provide scientists with many clues about Earth's history, offering evidence of dinosaurs and strange plants that existed in the past. This lesson will define a fossil, look at different types and characteristics of fossils, and then describe how fossils are formed.

What Is Geothermal Energy? - Definition, Advantages & Disadvantages

8. What Is Geothermal Energy? - Definition, Advantages & Disadvantages

In this lesson, we will learn about geothermal energy, including how we capture it and use it. We will discuss the pros and cons of exploiting geothermal energy sources.

What Are Fossil Fuels? - Definition, Advantages & Disadvantages

9. What Are Fossil Fuels? - Definition, Advantages & Disadvantages

Fossil fuels are sources of energy that have developed within the earth over millions of years. Because fossil fuels - oil, natural gas, and coal - take so long to form, they are considered nonrenewable. Learn more about these fuels, including the pros and cons of using them.

Glaciation: Definition, Periods & Causes

10. Glaciation: Definition, Periods & Causes

In this lesson, we explore glaciation. Referring to the movement and formation of glaciers, glaciation has played an important role in human history, including allowing for the implementation of one of humanity's most important practices.

Glacial Deposition: Definition & Results

11. Glacial Deposition: Definition & Results

As glaciers move and retreat, they push and drop rocks and sediments in a process known as glacial deposition. Learn about this glacial process and the interesting landforms that result from it, including moraines, erratics and drumlins, in this lesson.

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

12. 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.

What Are Natural Resources? - Definition & Types

13. What Are Natural Resources? - Definition & Types

Natural resources are materials provided by the Earth that humans can use to make more complex (human-made) products. In this lesson, you will learn some examples of natural resources and how to classify them.

Land & Natural Resources: Scarcity & Allocation

14. Land & Natural Resources: Scarcity & Allocation

This lesson explores the importance of two very unique resources to economic development: land and natural resources. It explains how land can last forever, while some natural resources can run out. That said, both require expert management.

Missouri's Natural Resources

15. Missouri's Natural Resources

Missouri is the ~'Show Me State~', but it could also be called the ~'sharing~' state because of the abundance of natural resources that it provides for other places all around the world. Let's overview the resources found above and below the ground.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

Earning College Credit

Did you know… We have over 200 college courses that prepare you to earn credit by exam that is accepted by over 1,500 colleges and universities. You can test out of the first two years of college and save thousands off your degree. Anyone can earn credit-by-exam regardless of age or education level.

To learn more, visit our Earning Credit Page

Transferring credit to the school of your choice

Not sure what college you want to attend yet? Study.com has thousands of articles about every imaginable degree, area of study and career path that can help you find the school that's right for you.

Support