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Ch 4: Human Impacts on Earth Systems

About This Chapter

Strengthen your knowledge of various human impacts on Earth systems using this chapter's engaging lessons. Check your comprehension of these impacts and improve your ability to succeed on a future test by taking mini quizzes and a practice exam.

Human Impacts on Earth Systems - Chapter Summary

This chapter offers a well-rounded examination of the impacts humans have on Earth systems. Study these impacts with help from top instructors who have developed informative lessons covering air pollution, deforestation, global warming and more. After completing this chapter, you will be able to:

  • Define and list sources and types of air pollution
  • Explain the harmful effects of thinning the ozone layer
  • List atmospheric causes of global warming and the effect it has on the climate
  • Discuss the causes and consequences of deforestation
  • Describe how desertification can occur naturally and through human activity
  • Detail ways coastal development can have an impact on ecosystems

Enjoy the ability to study the lessons at any pace that suits your schedule and personal preferences. All the lessons are accessible 24/7 via any computer, smartphone or tablet and can be visited as many times as you'd like. The lessons are paired with short quizzes that are designed to check your understanding and retention of lesson concepts. Our practice exam can gauge your overall understanding of human impacts on Earth systems before the day of your test.

6 Lessons in Chapter 4: Human Impacts on Earth Systems
What Is Air Pollution? - Definition, Sources & Types

1. What Is Air Pollution? - Definition, Sources & Types

In this video lesson, you will learn about the sources and types of air pollution. You will be able to identify the six classes of air pollutants identified by the Environmental Protection Agency and the Clean Air Act of 1970.

The Ozone Layer: Importance and the Harmful Effects of Thinning

2. The Ozone Layer: Importance and the Harmful Effects of Thinning

In this lesson, you will learn the importance of the ozone layer and how it is depleted. You will also study the research and policy that has been instrumental in its recovery.

Global Warming: Atmospheric Causes and Effect on Climate

3. Global Warming: Atmospheric Causes and Effect on Climate

Global warming is a multifaceted, complex issue. It involves both natural and human causes that can increase the amount of greenhouse gases. This lesson looks at some of the facts about global warming and how they could contribute to climate change.

Deforestation: Definition, Causes & Consequences

4. Deforestation: Definition, Causes & Consequences

Deforestation is the clearing of trees without the intent of replacing them or reestablishing a stand of trees. Learn reasons for deforestation and discover the consequences of this process in all forests, including tropical forests.

Desertification Caused by Human Activity

5. Desertification Caused by Human Activity

The earth is constantly changing, and one very dramatic and important change is from fertile land to deserts. This process of desertification can occur naturally, but is often caused or accelerated by human actions. Humans can accelerate this process by overgrazing, poor irrigation techniques, diverting rivers, and deforestation. This large issue is a global problem that must be combated.

How Coastal Development Impacts Ecosystems

6. How Coastal Development Impacts Ecosystems

What are coastal developments? And how do they damage coral reefs? Learn what's happening to the rainforests of the sea, and what scientists are doing to help. Take a quiz and see how much your knowledge has developed.

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