Ch 2: Ecosystems: Help and Review

About This Chapter

The Ecosystems chapter of this Environmental Science Help and Review course is the simplest way to understand ecosystems. This chapter uses simple and fun videos that are about five minutes long, plus lesson quizzes and a chapter exam to ensure students learn the essentials of ecosystems.

Who's it for?

Anyone who needs help learning or mastering college environmental science material will benefit from taking this course. You will be able to grasp the subject matter faster, retain critical knowledge longer and earn better grades. You're in the right place if you:

  • Have fallen behind in understanding biodiversity or ecosystems.
  • Need an efficient way to learn about ecosystems.
  • Learn best with engaging auditory and visual tools.
  • Struggle with learning disabilities or learning differences, including autism and ADHD.
  • Experience difficulty understanding your teachers.
  • Missed class time and need to catch up.
  • Can't access extra science learning resources at school.

How it works:

  • Start at the beginning, or identify the topics that you need help with.
  • Watch and learn from fun videos, reviewing as needed.
  • Refer to the video transcripts to reinforce your learning.
  • Test your understanding of each lesson with short quizzes.
  • Submit questions to one of our instructors for personalized support if you need extra help.
  • Verify you're ready by completing the Ecosystems chapter exam.

Why it works:

  • Study Efficiently: Skip what you know, review what you don't.
  • Retain What You Learn: Engaging animations and real-life examples make topics easy to grasp.
  • Be Ready on Test Day: Use the Ecosystems chapter exam to be prepared.
  • Get Extra Support: Ask our subject-matter experts any relevant question. They're here to help!
  • Study With Flexibility: Watch videos on any web-ready device.

Students will review:

In this chapter, you'll learn the answers to questions including:

  • What types of ecological niches and habitats are found in ecosystems?
  • What are the laws of thermodynamics?
  • What occurs during the carbon and nitrogen cycles?
  • How do food chains and energy flow work?
  • How do fossil fuels and greenhouse gases impact global warming?

18 Lessons in Chapter 2: Ecosystems: Help and Review
Test your knowledge with a 30-question chapter practice test
The Environment, Levels of Ecology and Ecosystems

1. The Environment, Levels of Ecology and Ecosystems

Do you know the difference between an environment and an ecosystem? In this lesson, you'll find out what makes an environment, and what makes an ecosystem. You'll also learn what ecology is and some of the ways that scientists study ecology using organisms, populations, communities, ecosystems and even the entire biosphere.

Ecosystems, Habitats and Ecological Niches

2. Ecosystems, Habitats and Ecological Niches

Check out this video lesson to understand the many complex aspects of an ecosystem. See how animals live in habitats and survive amongst their surroundings.

The Laws of Thermodynamics

3. The Laws of Thermodynamics

Learn about the first and second laws of thermodynamics. Find out how energy is generated, how it converts from one form to another, and what happens to energy in a closed system.

Global Ecology: Definition and Overview

4. Global Ecology: Definition and Overview

A large oil spill in the middle of the ocean and the release of greenhouse gases into the atmosphere are examples of environmental problems that can influence the entire planet. This lesson will explore the study of environmental problems occurring on a global scale, including the impact of globalization and current major global environmental problems.

What is Biodiversity? - Definition and Relation to Ecosystem Stability

5. What is Biodiversity? - Definition and Relation to Ecosystem Stability

Imagine making a list of all of the species you have ever heard of; it would be an enormous list! There are many different species on this planet. This lesson will explore the diversity of species, as well as the different types of diversity and how diversity of life is essential for maintaining healthy ecosystems.

Food Chains, Trophic Levels and Energy Flow in an Ecosystem

6. 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.

Biogeochemical Cycling and the Phosphorus Cycle

7. Biogeochemical Cycling and the Phosphorus Cycle

In this video lesson, we'll take a look at how elements large and small use other elements to grow. This is achieved through cycles. We'll look at macronutrients, trace elements and the biogeochemical and phosphorous cycles.

The Nitrogen Cycle, Acid Rain and Fossil Fuels

8. The Nitrogen Cycle, Acid Rain and Fossil Fuels

Do you know the difference between nitrite and nitrate? Do you have any clue how all the nitrogen in the atmosphere becomes usable? If you can't answer these questions, then you need to watch this lesson on the nitrogen cycle.

The Carbon Cycle and Long-Term Carbon Storage

9. 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.

Fossil Fuels, Greenhouse Gases, and Global Warming

10. Fossil Fuels, Greenhouse Gases, and Global Warming

In this video lesson, you'll learn what roles fossil fuels and greenhouse gases play in global warming, as well as what life on Earth can expect due to rising carbon dioxide levels within Earth's atmosphere.

Community Ecology: Definition & Types

11. Community Ecology: Definition & Types

Community ecology looks at the interactions between populations of organisms. Here we explore a polar ecosystem in Greenland to describe what community ecology entails and what it really means to be at the top of the food chain.

Realized Niche: Example & Definition

12. Realized Niche: Example & Definition

Every organism is adapted to environmental conditions in its habitat. However, it sometimes faces competition with other species that limits the conditions under which it can exist. Explore how competition between species can shape an organism's niche.

What Are Detritivores? - Definition & Examples

13. What Are Detritivores? - Definition & Examples

In this lesson, we will investigate detritivores. These organisms play a crucial role in all ecosystems by utilizing their unique diet to clean up decaying organic matter. We will see examples of them and learn of the benefits they provide to the world.

Abiotic Factors of the Tropical Rainforests

14. Abiotic Factors of the Tropical Rainforests

Every environment contains what are called biotic and abiotic factors. In this lesson you'll learn the definition and importance of abiotic factors. You'll also view some examples of abiotic factors that are present in the tropical rainforest.

Chaparral Animals: List, Food Web & Adaptations

15. Chaparral Animals: List, Food Web & Adaptations

Millions of different species exist around the world, each of which has evolved specific adaptations to thrive in environments seemingly unfit for humans. In this lesson, we're going to look at the plants and animals in one such biome, the chaparral.

Chaparral Biome Plant Life

16. Chaparral Biome Plant Life

Chaparrals are hot, dry, desert-like areas. While this biome may seem harsh, it is home to many types of plants specially adapted to the mild winters and hot, fiery summers.

Estuary Animals & Plants

17. Estuary Animals & Plants

In this lesson, you will learn about estuaries. Specifically, you will learn about the different types of plants and animals that live in estuaries and make up their complex ecosystem.

Scavenger Animals: Definition & Examples

18. Scavenger Animals: Definition & Examples

Do you eat leftovers? Many other animals do too. And many of these animals are scavengers. Find out what a scavenger animal is and some cool examples of these animals.

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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