Ch 25: The Earth & the Moon

About This Chapter

Use these video lessons to review facts about how the moon was formed, its orbit and its geologic structure. Look at phases of the moon, the tides and eclipses.

The Earth & the Moon - Chapter Summary

Watch our video lessons to examine theories about how the moon was formed. Look at the types of moon rocks we've discovered and examine the moon's atmosphere. Our instructors also discuss the phases of the moon.

Other lessons in this chapter look at lunar and solar eclipses. You'll also review what influences tides and see how tidal friction affects the earth and moon. After viewing all these lessons, you should be ready to:

  • Explain theories regarding the formation of the moon
  • Describe types of rocks found on the moon
  • Discuss the moon's atmosphere
  • Name phases of the moon, and tell why they occur
  • Define sidereal month and synodic month
  • Define lunar and solar eclipses, and state why they occur
  • Relate how the moon, sun and gravity influence the tides
  • Discuss tidal friction

Most of the material in these lessons probably was covered in a high school or college class, but our expert instructors may expose you to some new information, too. You can use the quizzes to assess your knowledge, and return to key points in the lesson by using the embedded video tags.

11 Lessons in Chapter 25: The Earth & the Moon
Test your knowledge with a 30-question chapter practice test
Formation of the Moon: Theories

1. Formation of the Moon: Theories

Explore the four major theories on the formation of the Moon. The theories include the fission theory, capture theory, condensation theory and giant impact theory. Also look at both information supporting and flaws found in these theories.

Lunar Geology: Types of Moon Rocks

2. Lunar Geology: Types of Moon Rocks

This lesson will discuss the layers of the Moon's interior, the dark and light colored areas of the Moon's surface, the Moon's craters, and how moon dust has formed over the ages.

The Moon's Atmosphere

3. The Moon's Atmosphere

This lesson will go over the lunar atmosphere, its composition, where it gets it atmosphere from, how it may lose its atmosphere, and what the technical term for the lunar atmosphere is.

How Earth & the Sun Affect the Phases of the Moon

4. How Earth & the Sun Affect the Phases of the Moon

This lesson will describe how the moon, Earth, and sun combine to form the phases of the moon. We'll also discuss the important concept of synchronous rotation.

Moon Phases: Names & Sequence

5. Moon Phases: Names & Sequence

This lesson will go over the phases of the moon. The full moon, new moon, waxing, waning, and gibbous phases and the order in which they occur and what they look like are discussed.

Motion of the Moon: Sidereal Month vs. Synodic Month

6. Motion of the Moon: Sidereal Month vs. Synodic Month

This lesson will teach you about the sidereal month and synodic month, how long they are, and how they are measured with respect to the stars and sun.

Lunar Eclipse: Definition & Types

7. Lunar Eclipse: Definition & Types

This lesson will teach you about the lunar eclipse. You'll learn the difference between a penumbral, partial, and total lunar eclipse, and see what totality means with respect to a total lunar eclipse.

How Can We Predict An Eclipse?

8. How Can We Predict An Eclipse?

This lesson will tell you when lunar and solar eclipses are possible, what nodes have to do with it, how long eclipse seasons last, and what the Saros cycle is.

How Gravity, the Moon & the Sun Influence Tides

9. How Gravity, the Moon & the Sun Influence Tides

This lesson will define tides, the tidal force, neap tide, and spring tide. It will also talk about how the sun, moon, and Earth interact to produce tidal bulges.

Tidal Friction: Effects on Earth & the Moon

10. Tidal Friction: Effects on Earth & the Moon

This lesson will go over the concept of tidal friction, why it occurs, and how all of that has affected Earth's spin and day length, as well as the moon's rotation and distance from Earth.

What Is a Solar Eclipse?

11. What Is a Solar Eclipse?

This lesson will describe what a solar eclipse is, why it's possible, when a partial or a total one will occur, and what cool effects occur during one.

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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