Ch 9: Praxis Middle School Science: Laws of Gravitation

About This Chapter

Refresh yourself on the laws of gravitation with these all-encompassing chapter lessons. Short, creative videos, lesson quizzes and a practice test make studying for the Praxis Middle School Science exam simple and fun.

Praxis Middle School Science: Laws of Gravitation - Chapter Summary

The concepts in this chapter about gravitation come to life through the animated videos and descriptions in this chapter. Our professional instructors walk you through each lesson carefully, pointing out details and applications so you feel confident on test day. Topics that you'll learn about and see on the exam include:

  • Newton's law of gravitation
  • Gravitational attraction of extended bodies and gravitational potential energy
  • Kepler's laws
  • Periods and speeds of elliptical orbits
  • Eccentricity as it relates to the orbits of planets

These lessons build on what you studied in high school and college, and you can measure your understanding by taking our quizzes. Practice sessions are fast and convenient as you can pull up the quizzes and final chapter test on any mobile device.

Objectives of the Praxis Middle School Science: Laws of Gravitation Chapter

Questions related to gravitation are on the Physical Sciences portion of the exam, which constitutes 22% of the test. There are 125 total questions on this computerized exam, and some will ask high-level questions to make sure you have a firm grasp of the material. The Praxis ensures that middle school science teachers understand science topics at an advanced level.

6 Lessons in Chapter 9: Praxis Middle School Science: Laws of Gravitation
Test your knowledge with a 30-question chapter practice test
Newton's Law of Gravitation: Definition & Examples

1. Newton's Law of Gravitation: Definition & Examples

This lesson explains how gravity works mathematically and teaches you how to use Newton's Law of Gravitation to solve problems. A short quiz will follow.

Gravitational Attraction of Extended Bodies

2. Gravitational Attraction of Extended Bodies

After watching this lesson, you will be able to explain what an extended body is, understand the derivation for the force of gravity between a point charge and a long, thin bar and solve problems using the result of that derivation.

Gravitational Potential Energy: Definition, Formula & Examples

3. Gravitational Potential Energy: Definition, Formula & Examples

In this lesson, you will learn what gravitational potential is, the equation we use to calculate it, and how to use that equation. We'll look at some real-life examples so you can see how it works. A short quiz will follow.

Kepler's Three Laws of Planetary Motion

4. Kepler's Three Laws of Planetary Motion

Find out about the interesting life and major contributions of Johannes Kepler. This lesson will also teach you how to find out how long it takes a planet to revolve around the sun!

Elliptical Orbits: Periods & Speeds

5. Elliptical Orbits: Periods & Speeds

After watching this lesson, you will be able to explain what an elliptical orbit is and calculate the period and speed of an object in an elliptical orbit, if given enough information. A short quiz will follow.

Eccentricity & Orbits of Planets

6. Eccentricity & Orbits of Planets

After watching this lesson, you should be able to explain what eccentricity is and calculate the eccentricity of an orbit given relevant distance measurements. A short quiz will follow.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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