About This Chapter
STAAR Science - Grade 8: Matter & Energy - Chapter Summary
This chapter will help students prepare for the STAAR Science - Grade 8 exam by delving into important facts about matter and energy, like atoms, electrons, states of matter and energy transformation. Specifically, the lessons will cover:
- The relationship between elements, molecules and compounds
- Solids, liquids, gases and plasma
- Types and groups of organic compounds
- Physical and chemical components of matter
- High and low density
- How energy is transformed in living organisms
- Definition and examples of an energy pyramid
- Parts of an ecosystem including food chains, trophic levels and energy flow
The lessons in this chapter have been developed to cover material about matter and energy that students are likely to see on the exam. To keep the studying processes enjoyable and effective, there are video and text lessons that visually exhibit the material. Students can take a quiz after each lesson to test their knowledge. A cumulative chapter test is available for students to practice for the exam.
1. What is An Atom? - Definition & Examples
After watching this video, you will be able to explain what an atom is, how it is structured, what they are made from, and give some examples of elements. A short quiz will follow.
2. The Electron Shell
You may be familiar with the role of electrons in electrical devices, but did you know that electrons also determine the chemical reactivity of everything around you?
3. Understanding the Relationships between Elements, Molecules & Compounds
Everything on Earth is made of atoms, and sometimes they combine to form new groups of atoms. The sky is the limit when it comes to these combinations, which account for the vast number of things we find in our natural world.
4. What are Simple Organic Compounds in Chemistry? - Types, Groups & Examples
We are going to learn about some of the simple organic compounds that exist in our world. This lesson covers the types, groups and general formulas of simple organic compounds.
5. 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.
6. Matter: Physical and Chemical Properties
How are substances identified? There are two major ways we can describe a substance: physical properties and chemical properties. Learn about how chemists use properties to classify matter as either a mixture or a pure substance.
7. Physical & Chemical Changes in the Digestive System
In this lesson, we'll be learning about the changes that take place in your digestive system when you eat. We'll cover both the physical and chemical changes as they happen in different organs, like your mouth, stomach and small intestine.
8. What Is Density? - Explanation & Examples
After watching this video, you will be able to explain what density is, give examples of high and low density, and calculate density using an equation. A short quiz will follow.
9. Energy and Life: The Transformation of Energy in Living Organisms
While the sun is an excellent source of energy, not all forms of life can utilize the sun's energy directly. This lesson describes how plants transform the sun's energy into potential energy stored in sugar, how living organisms utilize energy in sugar to perform work, and how the relationship between photosynthesis and cellular respiration is necessary for life.
10. What is an Energy Pyramid? - Definition & Examples
When organisms eat other organisms, energy is transferred. An energy pyramid can be used to diagram this flow of metabolic energy. Here we will examine the definition of an energy pyramid, look at some examples, and finish with a brief quiz.
11. Food Chains, Trophic Levels and Energy Flow in an Ecosystem
In this lesson, you'll learn about food chains, food webs, and the different roles that organisms play in an ecosystem. You'll also learn about how energy flows through an ecosystem.
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Other chapters within the STAAR Science - Grade 8: Test Prep & Practice course
- STAAR Science - Grade 8: The Periodic Table
- STAAR Science - Grade 8: Chemical Formulas & Equations
- STAAR Science - Grade 8: Force & Motion
- STAAR Science - Grade 8: Work & Energy
- STAAR Science - Grade 8: Earth & Space
- STAAR Science - Grade 8: Exploration of the Universe
- STAAR Science - Grade 8: Earth's Structure & Topography
- STAAR Science - Grade 8: Atmospheric Interactions
- STAAR Science - Grade 8: Living Organisms
- STAAR Science - Grade 8: Genetics
- STAAR Science - Grade 8: Ecosystems & the Environment
- STAAR Science - Grade 8: Scientific Processes & Tools
- STAAR Science - Grade 8 Flashcards