Ch 21: Science Concepts: Physical Sciences

About This Chapter

Watch these video lessons to review basic facts about properties related to matter, light and heat as well as the laws of motion. Get information on soil erosion and the materials that form the Earth.

Science Concepts: Physical Sciences - Chapter Summary

The lessons in this chapter let you renew your understanding of some basic principles of the physical sciences, including how magnetic force works. You'll learn more about the ways in which the laws of motion work and examine the properties of matter. Other lessons look at heat and light.

Our instructors also help you understand what the Earth is made of and the causes of soil erosion. When you've finished with these lessons, you should know more about topics that include:

  • Physical and chemical properties of matter
  • Ways that matter and light interact
  • Definition and properties of electricity and heat
  • How magnetic force works
  • Kinematics
  • Causes and impact of soil erosion
  • Minerals, rocks, water and soil

These lessons average about five minutes in length, and you can watch them from anywhere using a computer, tablet or smartphone. Each lesson is followed by a short quiz, and the chapter ends with a comprehensive exam. The answer key contains video links that let you jump back to the part of the lesson that talks about questions you may have answered incorrectly. Another useful feature is a text transcript of the lesson with key terms and concepts in bold type.

8 Lessons in Chapter 21: Science Concepts: Physical Sciences
Test your knowledge with a 30-question chapter practice test
Matter: Physical and Chemical Properties

1. Matter: Physical and Chemical Properties

How are substances identified? There are two major ways we can describe a substance: physical properties and chemical properties. Learn about how chemists use properties to classify matter as either a mixture or a pure substance.

How Light & Matter Interact

2. How Light & Matter Interact

This lesson will go over the fundamental basic of how light and matter interact with one another. You'll learn about photons, excited atoms, binding energy, and energy levels.

What is Heat? - Definition & Explanation

3. What is Heat? - Definition & Explanation

In this lesson, you will learn the definition of heat and find out how it differs from temperature. You will also explore practical applications of heat such as expansion, thermodynamics, heat transfer, specific heat, phase transitions, and heat engines.

What Is Electricity? - Definition & Concept

4. What Is Electricity? - Definition & Concept

Learn the history of electricity, from Ben Franklin's kite experiment to laptop batteries. Explore the many different ways electricity is measured, generated, and stored.

Magnetic Force: Definition, Poles & Dipoles

5. Magnetic Force: Definition, Poles & Dipoles

You're probably familiar with magnets, but have you ever stopped to consider how they work? In this lesson, we'll look at the root of magnetism and some of the fundamental properties of magnets.

What is Kinematics? - Studying the Motion of Objects

6. What is Kinematics? - Studying the Motion of Objects

Kinematics is the study of the motion of objects. Kinematics can tell you a lot about motion, but not everything. In this lesson, we will examine the types of questions kinematics can and cannot answer.

What is Soil Erosion? - Definition and Causes

7. What is Soil Erosion? - Definition and Causes

With soil erosion, the top layer of soil is worn away due to factors such as water, wind and tillage of farmland. Learn about soil erosion and how natural elements and human activities break up and transport soil.

Earth's Materials: Minerals, Rocks, Soil & Water

8. Earth's Materials: Minerals, Rocks, Soil & Water

Although the earth is a very complex system, there are only four main components of Earth that are the building blocks of life. These components are referred to as Earth's materials and include minerals, rocks, soil and water.

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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