<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 2: Matter

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


What do think this picture shows? Here’s a hint: This illustration mimics a photo taken with a special microscope that makes images of things that are extremely small. In fact, the gray spheres in the image represent things so small that trillions of them would fit inside the period at the end of this sentence. Each gray sphere is an atom of lead. Do you know what atoms are? They are the basic building blocks of matter. Matter, in turn, is all the “stuff” in the universe. In this unit you will learn much more about matter—from things as simple as atoms to as complex as you!

Chapter Outline

Chapter Summary


This unit defines matter and describes its properties. It compares elements, compounds, and mixtures. It explains how matter changes state and identifies special properties of gases. The unit also delves into atoms and elements, including how elements are classified.

Image Attributions

Show Hide Details
Difficulty Level:
At Grade
7 , 8
Date Created:
Jul 19, 2013
Last Modified:
Oct 03, 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