Ch 9: Ecology & Ecosystems: Homework Help

About This Chapter

The Ecology & Ecosystems chapter of this Middle School Earth Science Homework Help course helps students complete their ecology and ecosystems homework and earn better grades. This homework help resource uses simple and fun videos that are about five minutes long.

How it works:

  • Identify which concepts are covered on your ecology and ecosystems homework.
  • Find videos on those topics within this chapter.
  • Watch fun videos, pausing and reviewing as needed.
  • Complete sample problems and get instant feedback.
  • Finish your ecology and ecosystems homework with ease!

Topics from your homework you'll be able to complete:

  • Environmental factors
  • Levels of ecology
  • Food chains and trophic levels
  • Energy flow in an ecosystem
  • Predator/prey interactions
  • Symbiotic relationships
  • Population carrying capacity
  • Migration and dispersion
  • Conservation biology
  • Metapopulation theory
  • Ecological succession
  • Introduced and invasive species
  • The nitrogen and carbon cycles
  • Biome types

19 Lessons in Chapter 9: Ecology & Ecosystems: Homework Help
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.

Food Chains, Trophic Levels and Energy Flow in an Ecosystem

2. 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.

Predator/Prey Interactions, Camouflage, Mimicry & Warning Coloration

3. 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.

Symbiotic Relationships: Mutualism, Commensalism & Parasitism

4. Symbiotic Relationships: Mutualism, Commensalism & Parasitism

If your cat or dog has ever had fleas, you've witnessed symbiosis in action. In this lesson, learn the many types of symbiosis in biology, and how these relationships can have a positive, negative, or neutral effect on the individual species.

Carrying Capacity, Migration & Dispersion

5. Carrying Capacity, Migration & Dispersion

Have you ever wondered why some types of birds fly south in the winter or why some animals form territories? Watch this video to learn about a species' maximum growth capabilities, the way its members group themselves and why they might migrate to new locations every year.

Conservation Biology, Habitat Fragmentation, and Metapopulations

6. Conservation Biology, Habitat Fragmentation, and Metapopulations

It's becoming harder to conserve large, unbroken tracts of wilderness. Is there another way for conservation biologists to ensure the survival of a species? In this lesson, you'll learn about habitat fragmentation and metapopulations.

Ecological Succession: From Pioneer to Climax Communities

7. 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.

How Introduced and Invasive Species Alter Ecological Balance

8. How Introduced and Invasive Species Alter Ecological Balance

What happens to your block when a new neighbor moves in? Something changes, right? Now think about that on an ecological scale: what happens to an environment when a new SPECIES moves in?

Biomes: Desert, Tropical Rainforest, Savanna, Coral Reefs & More

9. Biomes: Desert, Tropical Rainforest, Savanna, Coral Reefs & More

Take a trip around the world and learn all about different biomes. Why can you only find certain plants and animals in specific places? What are the most fertile climates on Earth? Watch on to answer these and other questions.

Biomes: Tundra, Taiga, Temperate Grassland, and Coastlines

10. Biomes: Tundra, Taiga, Temperate Grassland, and Coastlines

Take a trip with us in this lesson, starting in the Pacific Ocean, traveling across California through the Central Valley and up to the peaks of the Sierra Nevada mountains. We'll learn how oceans, elevation, and people can determine which types of biomes are found in different areas and check out the Earth's most massive and oldest organisms.

The Nitrogen Cycle, Acid Rain and Fossil Fuels

11. 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

12. 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.

Tropical Rainforest Producers and Consumers

13. Tropical Rainforest Producers and Consumers

This lesson is about producers and consumers in the tropical rainforest. In this lesson, we'll go over what producers and consumers are and look at specific examples in the tropical rainforest ecosystem.

Clownfish & Sea Anemones: A Symbiotic Relationship

14. Clownfish & Sea Anemones: A Symbiotic Relationship

If you've seen the film 'Finding Nemo', you may already be familiar with clownfish and sea anemones. But, do you understand why they can live together? Or how each benefits the other? This lesson will explore the symbiosis between the clownfish and the sea anemone.

Human Impacts on the Environment

15. 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.

Evolutionary Stable Strategy

16. Evolutionary Stable Strategy

This lesson describes an evolutionary stable strategy (ESS). It briefly introduces game theory, explains the features of an ESS, gives a simple game that predicts the possibility of ESS, then looks at some real examples of ESS in nature.

Subsistence Strategies: Definition & Types

17. Subsistence Strategies: Definition & Types

There are five main subsistence strategies. These strategies relate to each other as they build from tiny societies to full populations. This lesson reviews these five strategies of subsistence.

Pseudomonas Fluorescens Uses in Agriculture

18. Pseudomonas Fluorescens Uses in Agriculture

This lesson is going to describe an organism known as Pseudomonas fluorescens. You'll learn what it is and how it's important to agriculture, including specific examples.

Rust Fungus: Definition & Life Cycle

19. Rust Fungus: Definition & Life Cycle

Rust fungus is a common fungus found on many different types of plants. It has a complex life cycles, requiring two separate plants species to complete.

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

Earning College Credit

Did you know… We have over 200 college courses that prepare you to earn credit by exam that is accepted by over 1,500 colleges and universities. You can test out of the first two years of college and save thousands off your degree. Anyone can earn credit-by-exam regardless of age or education level.

To learn more, visit our Earning Credit Page

Transferring credit to the school of your choice

Not sure what college you want to attend yet? Study.com has thousands of articles about every imaginable degree, area of study and career path that can help you find the school that's right for you.

Support