Ch 35: Cosmological Theories of the Universe

About This Chapter

Subject matter pertaining to origins and features of the universe is focused on in this chapter's fun, efficient video lessons. Some of the many key terms you'll see include the cosmological principle and Hubble's law.

Cosmological Theories of the Universe - Chapter Summary

In this chapter, our professional instructors cover the early universe's different developmental periods, such as the radiation and reionization eras. The Big Bang theory is explained and you'll get to review why it's the most widely accepted theory of its kind. Check your understanding of how this theory is different from the Steady State theory in a lesson. More topics in the chapter include:

  • Hubble's constant
  • The universe's fate as well as age and shape
  • How a galaxy differs from the universe

By being able to view these videos from mobile devices in addition to computers, you can check them out from anywhere you can get an Internet connection. The video tags provide an easy way to recheck any specific segments of lessons as you go through the chapter. You can get confirmation of your understanding of the content by completing the short practice quizzes found with each of the lessons.

9 Lessons in Chapter 35: Cosmological Theories of the Universe
Test your knowledge with a 30-question chapter practice test
Solar System, Galaxy, & Universe: Definitions & Difference

1. Solar System, Galaxy, & Universe: Definitions & Difference

Want to learn what the universe, galaxy, and solar system are as well as some cool facts about each one? This lesson will give you an overview of what these three things are in a relatable fashion.

Origins of the Universe: The Big Bang and Expanding & Contracting Universes

2. Origins of the Universe: The Big Bang and Expanding & Contracting Universes

Students will learn the origins of the universe, the Big Bang theory, the timeline of the universe, how the universe is still expanding to this day, and what astronomers expect the universe to look like in the future.

The Steady State Theory vs. the Big Bang Theory

3. The Steady State Theory vs. the Big Bang Theory

Did you know that the Big Bang wasn't always a well-accepted theory of our universe? There was a competing theory called the Steady State theory. Find out what it was all about and why its proponent actually helped name the Big Bang theory.

Evidence for the Big Bang Theory: Background Radiation, Red-Shift and Expansion

4. Evidence for the Big Bang Theory: Background Radiation, Red-Shift and Expansion

Discover what evidence exists to support the Big Bang theory of the birth of the universe. Learn how cosmic background radiation, the red shift of light and the ongoing expansion of the universe led scientists to believe that the universe was started with the Big Bang.

The Evolution of the Early Universe

5. The Evolution of the Early Universe

This lesson will describe four important stages of development in the early universe, the radiation era, recombination (decoupling) epoch, the dark age, and reionization era.

The Cosmological Principle

6. The Cosmological Principle

This lesson will dive into the famous cosmological principle by defining and explaining isotropy and homogeneity as well as their important implications for our universe.

Hubble's Law & Hubble's Constant

7. Hubble's Law & Hubble's Constant

This lesson will go over and define the Hubble Law and Hubble constant. We'll not only do a practice problem but also define conceptually what these two things mean to our cosmos.

How To Calculate the Age of the Universe

8. How To Calculate the Age of the Universe

This lesson will explain to you how old our universe is and how we calculate it thanks to the Hubble law and Hubble constant as well as one other simple equation.

The Universe's Curvature, Age & Fate

9. The Universe's Curvature, Age & Fate

What is the age of our universe? What shape does it take? What determines the fate of our universe and what is this fate? This lesson will tell you all of this and more!

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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