<img src="https://d5nxst8fruw4z.cloudfront.net/atrk.gif?account=iA1Pi1a8Dy00ym" style="display:none" height="1" width="1" alt="" />
Skip Navigation
Our Terms of Use (click here to view) have changed. By continuing to use this site, you are agreeing to our new Terms of Use.

Chapter 5: Energy

Difficulty Level: At Grade Created by: CK-12
Turn In


The surfer in this photo is dwarfed by the immense wave he’s riding, yet he’s managing to use the incredible energy of the wave for a thrilling ride. Ocean waves like this one carry a huge amount of energy. Do you know what energy is? Can you identify other forms of energy besides ocean waves? In this unit, you’ll learn a lot about energy, including how it makes modern life possible—even if you never ride a surfboard!

Chapter Outline

Chapter Summary


This unit introduces energy and energy resources. Different forms of energy—including thermal and sound energy—are described. The unit also explains how energy travels in waves, how light energy behaves, and how we use light to see. Electricity and magnetism, and the relationship between them, are explored as well.

Image Attributions

Show Hide Details
Difficulty Level:
At Grade
7 , 8
Date Created:
Nov 05, 2015
Last Modified:
Aug 17, 2016
Save or share your relevant files like activites, homework and worksheet.
To add resources, you must be the owner of the FlexBook® textbook. Please Customize the FlexBook® textbook.
Please wait...
Please wait...
Image Detail
Sizes: Medium | Original