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Ch 15: The Sun and Energy: Help and Review

About This Chapter

The sun and energy chapter of this Intro to Astronomy Help and Review course is the simplest way to master understanding the sun and energy. 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 the sun and energy.

Who's it for?

Anyone who needs help learning or mastering intro to astronomy material will benefit from taking this course. There is no faster or easier way to learn introductory astronomy. Among those who would benefit are:

  • Students who have fallen behind in understanding the sun and energy
  • Students who struggle with learning disabilities or learning differences, including autism and ADHD
  • Students who prefer multiple ways of learning science (visual or auditory)
  • Students who have missed class time and need to catch up
  • Students who need an efficient way to learn about the sun and energy
  • Students who struggle to understand their teachers
  • Students who attend schools without extra science learning resources

How it works:

  • Find videos in our course that cover what you need to learn or review.
  • Press play and watch the video lesson.
  • Refer to the video transcripts to reinforce your learning.
  • Test your understanding of each lesson with short quizzes.
  • Verify you're ready by completing the sun and energy 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 sun and energy chapter exam to be prepared.
  • Get Extra Support: Ask our subject-matter experts any sun and energy question. They're here to help!
  • Study With Flexibility: Watch videos on any web-ready device.

Students will review:

This chapter helps students review the concepts in a sun and energy unit of a standard intro to astronomy course. Topics covered include:

  • The structure of the Sun
  • The Sun's atmosphere
  • The stages of the Sun's life cycle
  • Sunspots and the magnetic cycle
  • Nuclear fusion and the Sun
  • Generating energy through gravitational contradiction
  • Using the ideal gas law and calculating pressure and volume

16 Lessons in Chapter 15: The Sun and Energy: Help and Review
Test your knowledge with a 30-question chapter practice test
Structure of the Sun

1. Structure of the Sun

Discover the layers of the sun, including the core, radiative zone, convective zone, photosphere, chromosphere, and corona. Find out which layers you can see from Earth. Investigate what sunspots and solar flares are.

Stages of the Sun's Life Cycle

2. Stages of the Sun's Life Cycle

Discover our sun, the provider of energy for life on Earth. Learn how the sun was born, how it lives as a main sequence star, how it will age into a red giant and how it will die as a white dwarf.

The Ideal Gas Law and the Gas Constant

3. The Ideal Gas Law and the Gas Constant

Have you ever wondered why the pressure in your car's tires is higher after you have been driving a while? In this lesson, we are going to discuss the law that governs ideal gases and is used to predict the behavior of real gases: the ideal gas law.

Using the Ideal Gas Law: Calculate Pressure, Volume, Temperature, or Quantity of a Gas

4. Using the Ideal Gas Law: Calculate Pressure, Volume, Temperature, or Quantity of a Gas

In another lesson, you learned that the ideal gas law is expressed as PV = nRT. In this video lesson, we'll go one step further, examining how to rearrange the equation to solve for a missing variable when the others are known.

The Sun: Atmosphere & Facts

5. The Sun: Atmosphere & Facts

This lesson will go over what the three layers of our sun's atmosphere are, the sun's surface temperature, chemical composition, radius, and distance from Earth.

Photosphere: Definition & Features

6. Photosphere: Definition & Features

This lesson will go over the sun's photosphere (its visible 'surface'), including where light comes from, how hot it is, and what granules and supergranules are.

Chromosphere: Definition & Properties

7. Chromosphere: Definition & Properties

This lesson will explore some of the interesting features of the second layer of the sun's atmosphere, the chromosphere, including spicules and its pinkish hue.

The Solar Corona & Solar Wind

8. The Solar Corona & Solar Wind

This lesson will define the solar corona and go over how it's involved with the formation of the solar wind and why it's hotter than the photosphere despite being the outermost layer of the sun's atmosphere.

Solar Flares, Solar Prominences & Coronal Mass Ejections

9. Solar Flares, Solar Prominences & Coronal Mass Ejections

This lesson will go over three events caused by magnetic interactions in our Sun. They are prominences, flares, and coronal mass ejections. We'll also touch base on how the latter two can affect life on Earth.

Helioseismology & the Heliosphere

10. Helioseismology & the Heliosphere

This lesson will go over important terms beginning with helio-: heliosphere, heliopause, and helioseismology - what they are and what importance helioseismology plays in our understanding of the sun.

What Are Sunspots?

11. What Are Sunspots?

This lesson will describe for you what sunspots are, where they appear, what parts they have, and why they're dark. It also discusses what differential rotation and a sunspot cycle are.

Why Do Sunspots Occur?

12. Why Do Sunspots Occur?

This lesson will outline for you why sunspots occur in its photosphere as we go over the Zeeman effect, polarity, and how the sunspot cycle and solar cycle are linked.

The Babcock Model of the Sun's Magnetic Cycle

13. The Babcock Model of the Sun's Magnetic Cycle

This lesson will cover a model called the Babcock model or Magnetic-Dynamo model, which helps to explain how many of the features of the solar and sunspot cycle occur.

How Energy Moves Within the Sun

14. How Energy Moves Within the Sun

This lesson will describe how energy is carried from the inner reaches of the Sun, through the radiative zone, then the convective zone, and finally into space.

What is Solar Wind? - Definition & Facts

15. What is Solar Wind? - Definition & Facts

Did you know that there is wind on the Sun? Read on to learn more about solar wind, what causes it, its speed and temperature, and how you can witness it on Earth.

What is the Age of Our Sun?

16. What is the Age of Our Sun?

Stars, just like humans, have a life cycle: they are born, they mature, they grow old and die. So when was our Sun born? And when will it die? Will we be around to see it? Read on to find out!

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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