Ch 27: Praxis General Science: Astronomy

About This Chapter

When you take the Praxis General Science examination, you'll need to demonstrate an understanding of key astronomy principles. In order to help you reach expert status, this chapter includes educational lessons on astronomy that include evaluative quizzes.

Praxis General Science: Astronomy - Chapter Summary

This chapter covers topics that are related to astronomy, a subject in which you must have fundamental knowledge if you're to pass the Praxis General Science examination. These video lessons prepare you to answer questions about the formation of the galaxy. Study the Big Bang theory, examine various elements of the planets in our solar system and explore satellites in orbit as you progress through the chapter. You'll have studied sufficiently when you can:

  • Explain theories on the origin and history of our universe
  • Identify stars according to their size and color
  • Describe the formation of spiral and elliptical and irregular galaxies
  • Discuss dark matter and gravitational lensing
  • Summarize the solar system and the major characteristics of the planets
  • Explore interactions in the Sun-Earth-Moon system
  • Define the orbit of planets and satellites
  • Detail technology used to study astronomy

Presented by experienced teachers, the video lessons can be watched online with your mobile device or on a desktop computer. The chapter allows you to complete self-assessment quizzes at your leisure so you can be sure that you're prepared when answering pertinent questions on the Praxis General Science examination.

9 Lessons in Chapter 27: Praxis General Science: Astronomy
Test your knowledge with a 30-question chapter practice test
Origins of the Universe: The Big Bang and Expanding & Contracting Universes

1. 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.

Solar System Overview

2. Solar System Overview

This lesson will go over the major aspects of our solar system, including the sun, planets, moons, asteroids, comets, meteors, meteorites, and meteoroids.

Types of Stars by Size, Color and Life Cycle

3. Types of Stars by Size, Color and Life Cycle

Learn to identify the different sizes and colors of stars and how they relate to the star life cycle. In this lesson, we'll talk about spectral classification, how many stars there are of each type and the approximate color of the different classes of stars.

Galaxy Formation: Spiral, Elliptical & Irregular Galaxies

4. Galaxy Formation: Spiral, Elliptical & Irregular Galaxies

This lesson explains how galaxies form, starting with the Big Bang. You'll also learn about the solar nebula hypothesis and three galaxy types, including spiral, elliptical, and irregular galaxies.

Interactions in the Sun-Earth-Moon System

5. Interactions in the Sun-Earth-Moon System

Learn how the sun, earth, and moon interact with each other to create tides, phases, eclipses, seasons, solar winds, and precession. Take a quiz and see how much you've picked up.

Major Characteristics of Planets in the Solar System

6. Major Characteristics of Planets in the Solar System

This lesson will go over some characteristics of the planets in our solar system with respect to their masses, diameters, temperatures, densities, and rotation.

What is Orbit? - Planets & Satellites

7. What is Orbit? - Planets & Satellites

This lesson talks about what an orbit is and defines some common terms associates with orbit. We also talk specifically about orbits of planets and satellites.

Dark Matter & Gravitational Lensing

8. Dark Matter & Gravitational Lensing

This lesson will describe what dark matter is, how much of a cluster of galaxies is made of it, where it's located, and how all of this is related to gravitational lensing.

Using Technology to Study the Earth & Universe

9. Using Technology to Study the Earth & Universe

Have you ever wondered how we know so much about the universe? Learn about how we use technology to study the universe, from the tiny to the enormous. Then take a quiz to test your knowledge.

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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