Ch 7: General Science: Organization of Matter

About This Chapter

Explore fun video lessons to get reacquainted with the organization of matter as you study for the NES General Science assessment, which has replaced the AEPA exam. Take lesson quizzes and a chapter exam to gauge your comprehension of the materials.

AEPA General Science: Organization of Matter - Chapter Summary

The lessons in this chapter can boost your confidence as you prepare to take the NES General Science assessment. Refresh your knowledge of the organization of matter so you are certain you can answer questions that address:

  • How elements are defined
  • Compounds and molecules
  • Heterogeneous mixtures
  • Atoms and subatomic particles
  • States of matter

Expert instructors guide the comprehensive video lessons that feature unique visual effects to create an entertaining studying experience. Watch the lessons in any order that works for you, and revisit them until you feel you've absorbed the information.

8 Lessons in Chapter 7: General Science: Organization of Matter
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'll 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.

States of Matter: Solids, Liquids, Gases & Plasma

8. States of Matter: Solids, Liquids, Gases & Plasma

Learn the four states of matter in the universe: solid, liquid, gas and plasma. Learn about the differences in shape and volume among the four states, which of the states is the most common and why plasma conducts electricity.

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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Other Chapters

Other chapters within the AEPA General Science (NT311): Practice & Study Guide course