Ch 5: Organization of Matter - ORELA Middle Grades General Science

About This Chapter

Delve into the deep inner space by looking into this chapter on the organization of matter. Our instructors have worked hard to make the lessons associated with middle grades general science easily digestible.

ORELA Middle Grades Gen Science: Organization of Matter - Chapter Summary

Following the middle grades general science program will lead you to concepts relating to the construction of our universe. This chapter will focus on the foundational concept and structuring of matter and deal with topics such as:

  • Identifying elements
  • Splitting the atom
  • Characteristics of an ion
  • Joining atoms
  • Constructing compounds
  • Molecular structure
  • Discovering subatomic particles

Discover the fun way our videos can strengthen your grasp of the universe and enjoy using the expansive video features; they can be advanced to any particular frame on the timeline and repeated to ensure your full understanding of the material. Have a question? No problem. Our instructors are also available to address any inquiry that may arise.

7 Lessons in Chapter 5: Organization of Matter - ORELA Middle Grades General Science
Test your knowledge with a 30-question chapter practice test
What Are Elements?

1. What Are Elements?

Look around you. What do you see? Elements are everywhere. They are the building blocks of all matter on Earth. In this lesson, we will discuss what an element is, how elements are written as symbols, and how elements are the building blocks of all matter.

How Compounds and Molecules Are Built From Elements

2. How Compounds and Molecules Are Built From Elements

Did you know that elements are somewhat like people and have different personalities? Some elements like to be left alone. Others prefer to hang out with friends. We will discuss how elements build molecules and compounds and how these can be classified.

Heterogeneous Mixture: Definition & Examples

3. Heterogeneous Mixture: Definition & Examples

You come into contact with mixtures every day. Most of the foods we eat and drink are some form of mixtures. In this lesson, you will learn about heterogeneous mixtures and the types of heterogeneous mixtures recognized by scientists.

What Is an Ion?

4. What Is an Ion?

Learn what an ion is and how it forms. We will look at some common ions and get to know the terms for the two types of ions. Take the quiz at the end to see how well you understand the lesson.

What is a Molecule? - Structure & Models

5. What is a Molecule? - Structure & Models

Water is a molecule. Caffeine is a molecule. DNA is a (really big) molecule. Learn how molecules are constructed and modeled and explore the different types of models.

The Atom

6. The Atom

Tune into this lesson to find out what matters about matter. What exactly is an atom? And, how do the atoms that make up the elements in the periodic table differ from one another?

What Is a Subatomic Particle? - Definition & Mass

7. What Is a Subatomic Particle? - Definition & Mass

A subatomic particle is a particle smaller than an atom. Learn more about how to identify subatomic particles through several examples, and test your knowledge with quiz questions.

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

Earning College Credit

Did you know… We have over 200 college courses that prepare you to earn credit by exam that is accepted by over 1,500 colleges and universities. You can test out of the first two years of college and save thousands off your degree. Anyone can earn credit-by-exam regardless of age or education level.

To learn more, visit our Earning Credit Page

Transferring credit to the school of your choice

Not sure what college you want to attend yet? has thousands of articles about every imaginable degree, area of study and career path that can help you find the school that's right for you.

Other Chapters

Other chapters within the ORELA Middle Grades General Science: Practice & Study Guide course