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Ch 33: Human Effects on the Environment

About This Chapter

Watch human effects on the environment video lessons to learn about the nitrogen and carbon cycle, water pollution, deforestation and much more. Each lesson is accompanied by a short multiple-choice quiz you can use to check your understanding of these topics.

Human Effects on the Environment - Chapter Summary and Learning Objectives

Take a look at the impact that humans have on the environment with the lessons in this chapter. You'll learn about acid rain, carbon storage and greenhouse gases. Then, examine the thinning of the ozone layer and the role humans play in animal extinction. Professional instructors provide video lessons on pollution, deforestation and water pollution. At the end of this chapter you'll be familiar with:

  • The nitrogen cycle
  • The carbon cycle
  • Sources and types of pollution
  • Desertification
  • Habitat destruction

Video Objectives
The Nitrogen Cycle, Acid Rain and Fossil Fuels Discusses nitrogen fixation and nitrification. Uses examples to explain the nitrogen cycle and defines eutrophication.
The Carbon Cycle and Long-Term Carbon Storage Details the functions of the carbon cycle and discusses photosynthesis and cellular respiration.
Fossil Fuels, Greenhouse Gases, and Global Warming Examines the impact humans have on the carbon cycle. Uses graphs to explain how global warming occurs. Discusses potential outcomes from a warmer planet.
Pollution: Physical, Chemical & Biological Defines pollution and lists the various types. Explains how each type occurs and provides examples.
Water Pollution: Definition, Types, and Sources Identifies point sources and non-point sources of pollution. Examines surface water and groundwater pollution.
What Is Air Pollution? - Definition, Sources & Types Discusses sources of air pollution and introduces the six most harmful air pollutants. Lists health issues associated with air pollution.
The Ozone Layer: Importance and the Harmful Effects of Thinning Describes the benefits of ozone and the ozone layer. Provides a historical account of how damage to the ozone layer was discovered.
Pollution and Habitat Destruction: The Human Factors Contributing To Endangerment & Extinction Describes the connection between human activity and species extinction. Examines habitat fragmentation, anthropogenic pollution and prevention methods.
Deforestation, Desertification & Declining Biological Diversity Defines these terms and identifies the ways that desertification and deforestation contribute to a decline in biological diversity.
Over-Exploitation: How Humans Affect Ecosystems By Decreasing Species Populations Explains how over-harvesting occurs. Uses overfishing as an example to detail the effects on the ecosystem caused by this practice.

10 Lessons in Chapter 33: Human Effects on the Environment
Test your knowledge with a 30-question chapter practice test
The Nitrogen Cycle, Acid Rain and Fossil Fuels

1. 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

2. 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

3. 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.

Pollution: Physical, Chemical & Biological

4. 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.

Water Pollution: Definition, Types, and Sources

5. Water Pollution: Definition, Types, and Sources

In this lesson, you will learn about the different types and sources of water pollution. You will gain an understanding of both surface water and groundwater pollution and the similarities and differences between them.

What Is Air Pollution? - Definition, Sources & Types

6. 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

7. 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.

Pollution and Habitat Destruction: The Human Factors Contributing To Endangerment & Extinction

8. Pollution and Habitat Destruction: The Human Factors Contributing To Endangerment & Extinction

In this lesson you will learn about two ways humans contribute to species extinction. We break up habitats by building roads and clearing land, and we pollute both land and water. You will also learn about the specific terms used to describe the processes, habitat fragmentation and anthropogenic pollution.

Deforestation, Desertification & Declining Biological Diversity

9. Deforestation, Desertification & Declining Biological Diversity

When trees are lost due to deforestation, the result can be a drier climate and desertification or the transformation of the once fertile land to desert. Learn how deforestation and desertification can lead to a decline in biological diversity.

Over-Exploitation: How Humans Affect Ecosystems By Decreasing Species Populations

10. Over-Exploitation: How Humans Affect Ecosystems By Decreasing Species Populations

In this lesson, you'll learn how humans overexploit or overharvest species. You will discover the primary way in which humans are responsible for overfishing. You will also learn about how this negatively impacts ecosystems.

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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