# Ch 27: The Sun's Structure & Components

Watch online video lessons to learn about the sun's layers, nuclear fusion, gravitational contraction and more. Each lesson includes a helpful self-assessment quiz that can tell you instantly how well you understood the presentation.

## The Sun and Energy - Chapter Summary and Learning Objectives

Use this chapter to study the sun's life cycle, from its origins as a cloud of gas and dust to the phases of gravitational contraction. Our instructors can show you how the energy generated from this process created enough heat for nuclear fusion to occur. You can also take a closer look at the structure of the sun and learn how its sunspot cycle affects Earth. Lessons in this chapter are designed to teach you about the following:

• Gravitational contraction
• The life cycle of the sun
• Sun structure
• Steps in nuclear fusion
• The ideal gas law

Video Objectives
Structure of the Sun Explore the radiative and convective zones in the sun's inner layers. Study the temperature of its outer layers.
The Sun's Atmosphere Identify characteristics of the sun's chromosphere and corona.
Stages of the Sun's Life Cycle Learn how nuclear fusion transformed the sun from a nebula into a main sequence star. Chart the sun's eventual development into a red giant and white dwarf.
Sunspots & the Magnetic Cycle Discover the length of the sunspot cycle. Learn how it affects our climate.
Nuclear Fusion & the Sun Differentiate nuclear fission from nuclear fusion. Explore steps in the proton-proton chain reaction.
Generating Energy Through Gravitational Contraction Relate gravitational contraction to the sun's history.
The Ideal Gas Law and the Gas Constant Explain the connection between variables represented in the ideal gas equation.
Using the Ideal Gas Law: Calculate Pressure, Volume, Temperature or Quantity of a Gas Practice using the ideal gas equation to solve for unknown variables, such as pressure, volume, moles or temperature.

12 Lessons in Chapter 27: The Sun's Structure & Components
Test your knowledge with a 30-question chapter practice test
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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