Ch 23: Energy Concepts

About This Chapter

Watch energy video lessons and learn about radiant energy, the laws of thermodynamics and more. These easy-to-follow lessons are just a portion of our online study guide and video collection.

Energy Concepts - Chapter Summary and Learning Objectives

Lessons in this chapter can help you discover the differences between radiant, thermal and chemical energy types. Instructors can also show you the pros and cons of harvesting wind and hydroelectric power and teach you how to distinguish between these energy resources and non-renewable forms. By the end of this chapter, you should be familiar with the following concepts:

  • Units for measuring energy
  • Entropy and the law of energy conservation
  • Forms of energy
  • Types of renewable and non-renewable energy resources

Video Objective
What is Energy? - Definition and Significance in Nature Explains energy sources and units of measurement before providing examples of different energy types
First Law of Thermodynamics: Law of Conservation of Energy Describes the behavior of energy in closed and open systems and uses the concept of friction to demonstrate the law of energy conservation
Second Law of Thermodynamics: Entropy and Systems Illustrates the ways in which a system's potential energy escapes and becomes less usable over time
Resources and Reserves: Definitions & Examples Outlines the differences between terminology describing an area's natural concentration of minerals and terminology describing the amount that can be extracted
Renewable & Non-Renewable Resources: Definition & Differences Names resources that can be replenished relatively quickly by nature - such as biofuels and geothermal energy - and those that do not regenerate
What is Chemical Energy? - Definition & Examples Provides examples of energy types resulting from the breaking of chemical bonds in endothermic and exothermic reactions
What is Radiant Energy? - Definition & Examples Describes the transfer of energy from the sun by electromagnetic waves of varying wavelengths and frequencies
What is Thermal Energy? - Definition & Examples Explains how the kinetic energy created when an object's molecules speed up is transferred as heat
Wind as a Renewable Energy Resource: Advantages & Disadvantages Outlines the pros and cons of wind power, including cost, efficiency, reliability and aesthetics
Hydroelectric Energy: Definition, Uses, Advantages & Disadvantages Contrasts the reliability of hydroelectric energy with a reservoir's adverse environmental impacts on communities upstream and downstream
Units and Conversion of Energy Discusses conversion factors for jules, watts, calories and BTUs

13 Lessons in Chapter 23: Energy Concepts
Test your knowledge with a 30-question chapter practice test
Energy Consumption History: Global Trends & Implications

1. Energy Consumption History: Global Trends & Implications

Simply put, our world depends on energy. But the way we use energy changes through time. In this lesson, you'll learn about world energy consumption, who keeps track of it, and what implications that information has for our global energy future.

Present & Future Global Energy Uses & Needs

2. Present & Future Global Energy Uses & Needs

Our world is powered by a variety of energy sources. What we use now may influence what we can utilize in the future. We'll have some tough decisions to make, all of which will have impacts on society, the environment and global and local economies.

What is Energy? - Definition and Significance in Nature

3. What is Energy? - Definition and Significance in Nature

This lesson describes the nature of energy and how it is transferred from one source into another. Additionally, it will describe the significance of energy in natural systems.

First Law of Thermodynamics: Law of Conservation of Energy

4. First Law of Thermodynamics: Law of Conservation of Energy

This video describes the first law of thermodynamics. Several examples of the application of this law are discussed. The significance of the law and its practical application are discussed as well.

Second Law of Thermodynamics: Entropy and Systems

5. Second Law of Thermodynamics: Entropy and Systems

In this lesson, we'll learn about the second law of thermodynamics. By studying this law, you'll understand how energy works and why we're all moving towards eventual chaos and disorder.

Resources and Reserves: Definitions & Examples

6. Resources and Reserves: Definitions & Examples

You might hear a lot about reserves and resources on Earth, but what exactly is the difference between the two? In this video lesson, you will learn about each, as well as how they represent different things that are quite related to each other.

Renewable & Non-Renewable Resources: Definition & Differences

7. Renewable & Non-Renewable Resources: Definition & Differences

We use a variety of Earth's resources, but not all of them will be around forever. This lesson explains the difference between resources that can be regenerated for our use and those that are gone after they are used once.

What is Chemical Energy? - Definition & Examples

8. What is Chemical Energy? - Definition & Examples

This lesson describes chemical energy as a type of potential energy stored in chemicals, such as sugar and gasoline. The lesson discusses how energy is transferred from solar energy to chemical energy by plants and how gasoline is a source of chemical energy used to move cars.

What is Radiant Energy? - Definition & Examples

9. What is Radiant Energy? - Definition & Examples

This lesson defines and describes radiant energy in its different forms. The different types of electromagnetic waves created by radiant energy are identified and described as well. This includes X-rays, microwaves, and radio waves, to mention a few.

What is Thermal Energy? - Definition & Examples

10. What is Thermal Energy? - Definition & Examples

This lesson defines and identifies examples of thermal energy everywhere from your kitchen to the Earth's core. We'll discuss geothermal energy, a renewable energy source, as well.

Wind as a Renewable Energy Resource: Advantages & Disadvantages

11. Wind as a Renewable Energy Resource: Advantages & Disadvantages

Wind power is a renewable energy resource, but there are both pros and cons to this type of energy. In this video lesson, you will learn about wind power as well as some of the benefits and drawbacks of using it as a global energy source.

Hydroelectric Energy: Definition, Uses, Advantages & Disadvantages

12. Hydroelectric Energy: Definition, Uses, Advantages & Disadvantages

In this video lesson you will understand how water can be used to generate electrical energy. You will also identify some benefits and drawbacks of using this type of renewable resource for energy production.

Energy Measurement Units & Unit Conversion

13. Energy Measurement Units & Unit Conversion

It's important to understand both how energy is measured and the different units used in those measurements. In this lesson, you'll learn about common energy measurement units, as well as see examples showing how to convert between them.

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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