About This Chapter
STAAR Science - Grade 8: Ecosystems and the Environment - Chapter Summary
This chapter delves into a wide variety of key topics related to ecosystems and the environment, bolstering student's knowledge in the area so they can go into the STAAR Science - Grade 8 test prepared for the subject. Topics covered include biotic factors, ecological balance, and food webs, in addition to the following:
- Abiotic factors
- Ecological succession
- Biological themes
- Producers, consumers, and decomposers
- Interactions between predator and prey
- Biological hosts
- Human effect on the environment and pollution
- Environmental adaptation
Students will able to stay organized through the dashboard feature and check their understanding topic-by-topic with the practice quizzes accompanying each lesson. And at the end of the chapter, the practice chapter exam offers an opportunity for students to make sure they have a firm grip on the subject as a whole.
1. What Is an Ecosystem? - Definition & Explanation
Similar to a car engine that is made up of multiple parts working together, an ecosystem has interacting parts that support a whole. But how do we define an ecosystem and what are the components they consist of?
2. Biotic Factor: Definition & Examples
This lesson focuses on the meaning of the term 'biotic factor.' It also introduces other terminology such as the words 'abiotic' and 'ecosystem'. There are real-world examples embedded in the lesson, and a brief quiz follows.
3. Abiotic Factors of an Ecosystem: Definition & Examples
When it comes to ecosystems, a mountain, a river, and a cloud have more in common than you might think. Abiotic factors have specific and important roles in nature because they help shape and define ecosystems.
4. Ecological Succession: From Pioneer to Climax Communities
Just as people grow and change so, too, do ecosystems. Watch this lesson to learn about ecological succession from the beginning stages of development to a community's ultimate destination, or climax.
5. What Is Ecological Balance? - Definition & Importance
In this lesson, we'll discuss what ecological balance is and how it's important for the function of an ecosystem. We'll also explore some examples of ecological balance.
6. Themes in Biology: Diversity, Interdependence & Evolution
Biology is broadly divided into three key themes: diversity, interdependence, and evolution. We'll describe each of these themes and explain their importance to understanding life as a whole. At the end, you can test your knowledge with a brief quiz.
7. What is a Food Web? - Definition & Explanation
This lesson will provide a definition of a food web, as well as describe its parts and discuss examples of different types. It will also explain the transfer of energy through a food web.
8. Producers, Consumers & Decomposers in Ecosystems
In this lesson we will learn about producers, consumers, and decomposers. Find out what they are and how they interact with one another in the ecosystem.
9. Predator/Prey Interactions, Camouflage, Mimicry & Warning Coloration
You probably know that skunks can be quite stinky, bees sting and monarch butterflies are pretty, but do you know why? This lesson will introduce you to the reasons why some animals look or act the way they do and how these things relate to the predator/prey relationship.
10. What is a Host in Biology? - Definition & Overview
You might be familiar with the word 'host,' but it means something very different in biology than it does when you're talking about your home. In this lesson you'll learn the biological meaning of host, and why most of the time you don't want to be one.
11. Human Impacts on the Environment
The human population continues to grow, but the size of Earth and the resources available for our use are limited. Humans greatly impact the world around them, and our actions can and often do have dramatic and long-lasting consequences.
12. Pollution: Physical, Chemical & Biological
Pollution is the presence of unwanted substances in an environment. It is often the result of human interference. Learn about physical, chemical and biological pollutants and see examples of each.
13. Environmental Changes & Adaptation in Organisms
In this lesson, we will discuss what happens when an organism is forced to deal with environmental changes. You will learn what adaptation is and how organisms benefit from it.
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Other chapters within the STAAR Science - Grade 8: Test Prep & Practice course
- STAAR Science - Grade 8: Matter & Energy
- 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: Scientific Processes & Tools
- STAAR Science - Grade 8 Flashcards