Ch 18: Earth's Spheres, Surface & Structure: Help and Review

About This Chapter

The Earth's Spheres, Surface and Structure chapter of this Introduction to Physical Geology Help and Review course is the simplest way to master Earth's spheres, surface and structure concepts. This chapter uses simple and fun videos that are about five minutes long, plus lesson quizzes and a chapter exam to ensure students learn the essentials of Earth's structure and surface and its spheres.

Who's it for?

Anyone who needs help learning or mastering college physical geology material will benefit from taking this course. You will be able to grasp the subject matter faster, retain critical knowledge longer and earn better grades. You're in the right place if you:

  • Have fallen behind in understanding the spheres of the earth or its structure and surface.
  • Need an efficient way to learn about earth's spheres, surface and structure.
  • Learn best with engaging auditory and visual tools.
  • Struggle with learning disabilities or learning differences, including autism and ADHD.
  • Experience difficulty understanding your teachers.
  • Missed class time and need to catch up.
  • Can't access extra science learning resources at school.

How it works:

  • Start at the beginning, or identify the topics that you need help with.
  • Watch and learn from fun videos, reviewing as needed.
  • Refer to the video transcripts to reinforce your learning.
  • Test your understanding of each lesson with short quizzes.
  • Submit questions to one of our instructors for personalized support if you need extra help.
  • Verify you're ready by completing Earth's Sphere's, Surface and Structure chapter exam.

Why it works:

  • Study Efficiently: Skip what you know, review what you don't.
  • Retain What You Learn: Engaging animations and real-life examples make topics easy to grasp.
  • Be Ready on Test Day: Use the Earth's Sphere's, Surface and Structure chapter exam to be prepared.
  • Get Extra Support: Ask our subject-matter experts any relevant question. They're here to help!
  • Study With Flexibility: Watch videos on any web-ready device.

Students will review:

In this chapter, you'll learn the answers to questions including:

  • How do external and internal forces affect Earth?
  • What are the four spheres of the Earth?
  • How do Earth's spheres interact with one another?
  • What properties are found in Earth's mantle, core and crust?
  • How do scientists approach the study of the Earth's interior?

10 Lessons in Chapter 18: Earth's Spheres, Surface & Structure: Help and Review
Test your knowledge with a 30-question chapter practice test
The Dynamic Earth: Internal & External Forces that Shape Earth's Surface

1. 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.

The Four Spheres of Earth: Geosphere, Hydrosphere, Biosphere, and Atmosphere

2. The Four Spheres of Earth: Geosphere, Hydrosphere, Biosphere, and Atmosphere

Earth is made up of four distinct yet connect spheres. In this video lesson, you will learn about where each sphere is found on Earth, as well as some features commonly found in each.

Interactions of Earth's Spheres: Purpose and Examples

3. Interactions of Earth's Spheres: Purpose and Examples

The four spheres of Earth drive all of its processes and support life on our unique planet. In this video lesson, you will see examples of how Earth's spheres interact with each other to form an overall complex and connected system.

Earth's Internal Layers: Crust, Mantle & Core

4. Earth's Internal Layers: Crust, Mantle & Core

Earth is made up of several different layers, each with unique properties. In this video lesson, you will identify each layer of Earth and how it relates to Earth as a whole.

How Scientists Study Earth's Interior Structure

5. How Scientists Study Earth's Interior Structure

We can't see what Earth's interior is made of, but scientists are able to study it in other ways. In this video lesson, you will learn how seismic activity helps us understand and describe the inner layers of the earth.

International Date Line: Definition, History & Location

6. International Date Line: Definition, History & Location

There is a line on Earth that causes you to change days when you cross it. This lesson will explain what the International Date Line is, how it affects the time zones on either side, and the history of how we decided on it.

Longitude: Definition & Examples

7. Longitude: Definition & Examples

After completing this lesson, you will be able to explain what longitude is, give some examples of longitudes around the world, and describe approximately how to figure out your longitude. A short quiz will follow.

Magnetic Declination: Definition & Angles

8. Magnetic Declination: Definition & Angles

Some cars have a compass that tells you in which direction you're traveling. Did you know that this compass can be wrong depending on where you are? This lesson will discuss this discrepancy by explaining magnetic declination and giving a few examples.

Revolution of the Earth: Speed & Effects

9. Revolution of the Earth: Speed & Effects

Why do seasons change? What causes leap years? This lesson answers those questions through an investigation into Earth's revolution. Illustrations, a lesson summary, and brief quiz are also included.

The Earth's Crust: Facts, Layers, Temperature & Composition

10. The Earth's Crust: Facts, Layers, Temperature & Composition

The Earth's crust is just a thin layer surrounding our world. Although it is the only part of the Earth any of us see, it makes up just one percent of the planet's total volume.

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

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