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Ch 34: Overview of Ecosystems

About This Chapter

Expand your understanding of ecosystems with this overview that includes abiotic factors, biomass, food chains, and more. These self-paced lessons are a helpful resource for individuals preparing for an exam or catching up on missed class time.

Overview of Ecosystems - Chapter Summary

The lessons in this chapter provide an overview of ecosystems, which includes a review of trophic levels and energy flow in an ecosystem. You will also get a better understanding of long-term carbon storage. After completing the chapter, you should be prepared to:

  • List components of an ecosystem
  • Provide real-world examples of biotic factors
  • Discuss how abiotic factors help shape and define ecosystems
  • Explain how energy flows through an ecosystem
  • Recall the role decomposers have in the environment
  • Define terms like biomass and ecological niche
  • Discuss the role living organisms have in the carbon cycle
  • Recount steps of the phosphorus cycle

Each lesson comes with a brief quiz to determine how much of the content you can remember. You can study all of the lessons or just focus on specific topics. Make the most of this resource by printing the quiz in worksheet form to study offline.

9 Lessons in Chapter 34: Overview of Ecosystems
Test your knowledge with a 30-question chapter practice test
What Is an Ecosystem? - Definition & Explanation

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?

Biotic Factor: Definition & Examples

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.

Abiotic Factors of an Ecosystem: Definition & Examples

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.

Food Chains, Trophic Levels and Energy Flow in an Ecosystem

4. 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.

What is a Decomposer? - Definition & Examples

5. What is a Decomposer? - Definition & Examples

Decomposers are an often overlooked part of the natural world, but their job is an important one. Learn what decomposers are, what role they have in the environment and how people use them.

What Is Biomass? - Definition & Explanation

6. What Is Biomass? - Definition & Explanation

In this lesson, you'll learn what ecologists use to quantify the amount of matter in an ecological community. This often relates to the amount of energy being produced by various parts of that community.

Ecological Niche: Definition & Importance

7. Ecological Niche: Definition & Importance

Most people want to feel like they belong and have an important role in society. This is also true in a biological aspect. In this lesson, we will learn about ecological niches as well as the roles of organisms and the various aspects of their lives.

The Carbon Cycle and Long-Term Carbon Storage

8. The Carbon Cycle and Long-Term Carbon Storage

All living organisms have a role in the carbon cycle. Do you know you understand how humans, animals and plants use carbon? This lesson will introduce you to the carbon cycle and explain how it functions on a global scale.

Phosphorus Cycle: Steps, Definition & Diagram

9. Phosphorus Cycle: Steps, Definition & Diagram

Phosphorus is an essential element to all living organisms. It is part of our DNA and RNA, and it forms the molecule ATP, which gives all living things energy. This lesson explains its importance and will walk you through the steps of the phosphorus cycle.

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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