About This Chapter
Overview of Earth's Spheres & Internal Structure - Chapter Summary
This series of bite-sized video lessons examines the earth's internal structure and spheres. As you progress through the chapter, you'll become familiar with the locations and characteristics of the earth's spheres and layers, including the hydrosphere, crust, core and mantle. To help you reinforce your understanding of these topics, we've included plenty of self-assessment quizzes throughout the chapter. Use any computer or mobile device to study, and reach out to our instructors if you have any questions. When you're finished with the chapter, you should be able to:
- Recognize the internal and external forces that shape the surface of the earth
- Identify the earth's four spheres and describe their interactions
- Explain how scientists go about studying the interior structure of the earth
- Describe the earth's internal layers
- Evaluate the composition of the lithosphere and lower mantle
- Assess the density of the asthenosphere
- Discuss the composition of the earth's outer inner cores
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.
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.
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.
4. 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.
5. 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.
6. The Lithosphere: Definition & Composition
The lithosphere is where we live. It is also the source of many geologic events that affect us. In this lesson, you will learn more about this important part of our planet.
7. Asthenosphere: Definition, Temperature & Density
The asthenosphere is a layer of the inner earth where the crust begins to melt into the mantle. This lesson will discuss the important properties of the asthenosphere.
8. Lower Mantle: Definition, Composition & Facts
This lesson is on the lower mantle, an important part of the earth. Here, we'll cover what the lower mantle is and what it's made of. We'll also go over where you can find it and its importance in shaping our planet.
9. Outer Core of the Earth: Definition, Composition & Facts
Learn about the outer core of the earth, including its temperature, composition and state, as well as how the motion of the outer core creates the earth's magnetic field. Then, test your knowledge with a short quiz.
10. Inner Core of the Earth: Definition, Composition & Facts
The inner core is located at the center of the Earth and is composed of nickel and iron. Most of what we know about the inner core is through studying seismic waves. This lesson will cover the facts about the inner core.
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Other chapters within the UExcel Earth Science: Study Guide & Test Prep course
- Basic Earth Science Concepts
- Understanding Earth's History
- Understanding Geologic Time
- The Properties of Matter
- The Lithosphere
- Overview of Minerals & Rocks
- Igneous Rocks Basics
- Weathering, Erosion & Wasting
- Sedimentary & Metamorphic Rocks
- Geological Forms
- Water Balance
- Understanding Running Water
- Overview of Groundwater Systems
- Life Cycle of Glaciers
- Properties of Oceans
- Basics of Coastal Hazards
- The Atmosphere
- Weather and Storms
- Understanding Earthquakes
- Understanding Energy Resources
- UExcel Earth Science Flashcards