Ch 20: Intro to Life in the Universe

About This Chapter

In this chapter, you'll get a thorough introduction to life in the universe. Review these fun video lessons to prepare for upcoming astronomy tests, get extra help with your science homework or simply engage your curiosity about life in outer space.

Intro to Life in the Universe - Chapter Summary

Does extraterrestrial life exist in our universe? In this astronomy chapter, our expert instructors will explain theories and predictors related to intelligent life on distant planets. Our short video lessons discuss the work of scientist Stanley Miller, as well as how the human lifetime relates to time in the universe. By the end of the chapter, you should be able to:

  • Compare human lifetime to the universe
  • Assess the existence of intelligent life on other planets and throughout the universe
  • Recognize planetary factors that can predict extraterrestrial life
  • Name planets around distant stars
  • Evaluate the theories and experiments of Stanley Miller

As you work through the chapter, take the short quizzes that accompany each lesson. These self-assessments are designed to solidify your understanding of the information. You can submit questions to our instructors if any arise, and you'll be able to revisit the lessons as many times as needed. The chapter is also available to study around-the-clock.

6 Lessons in Chapter 20: Intro to Life in the Universe
Test your knowledge with a 30-question chapter practice test
Comparing the Human Lifetime to the Universe

1. Comparing the Human Lifetime to the Universe

Did you ever wonder how long your lifespan actually is compared to the lifespan of the entire universe if it's condensed to one year? This lesson will tell you that and much more.

Intelligent Life in Our Universe

2. Intelligent Life in Our Universe

This lesson will explore the possibility of finding intelligent life beyond Earth by traveling to it or by detecting its signals, as well as the chances that such life exists in the first place.

Is There Life on Other Planets?

3. Is There Life on Other Planets?

This lesson will explore the places and conditions in our solar system and beyond that may make life possible. We'll discuss extremophiles, the habitable zone, Mars, and Europa.

Planetary Predictors of Extraterrestrial Life

4. Planetary Predictors of Extraterrestrial Life

Investigate what is needed for life to exist anywhere and the implications for life in our solar system beyond Earth. Consider Mars and some of the moons of Jupiter and Saturn, including Europa, Callisto, Ganymede and Enceladus.

Planets Around Distant Stars

5. Planets Around Distant Stars

This lesson will describe how extrasolar planets can be found and if any have been found. Methods like Doppler shifts, microlensing, and transits will be defined.

Stanley Miller: Theory, Experiment & Apparatus

6. Stanley Miller: Theory, Experiment & Apparatus

How did life originate on Earth? We may never have a complete and definite answer to that question, but in 1953, chemist Stanley Miller conducted a famous experiment that would show how the early Earth could have produced the chemicals of life.

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

Earning College Credit

Did you know… We have over 200 college courses that prepare you to earn credit by exam that is accepted by over 1,500 colleges and universities. You can test out of the first two years of college and save thousands off your degree. Anyone can earn credit-by-exam regardless of age or education level.

To learn more, visit our Earning Credit Page

Transferring credit to the school of your choice

Not sure what college you want to attend yet? Study.com has thousands of articles about every imaginable degree, area of study and career path that can help you find the school that's right for you.

Support