Ch 36: Praxis Middle School Science: Biodiversity

About This Chapter

Study biodiversity, the environment and the changing ecological balance with our lessons and quizzes. Let us help you prepare for the Praxis Middle School Science test.

Praxis Middle School Science: Biodiversity - Chapter Summary

The lessons in this chapter offer a review of biodiversity, the impact of humans on the environment and the earth's biomes as you prepare for the Praxis Middle School Science test. Get an in-depth look at topics like ecological succession, and ocean and freshwater biomes. These video lessons and quizzes ensure you'll be able to do the following:

  • Define biodiversity
  • Discuss deforestation and the decline in biodiversity
  • Detail the human impact on the environment
  • Examine invasive species and ecological balance
  • Describe the biogeochemical and phosphorus cycles
  • Discuss the cycles of matter
  • Define renewable and non-renewable resources
  • Understand fossil fuels, greenhouse gasses and global warming

Led by expert instructors, the lessons give you a solid overview of the biodiversity facts you'll need to understand to do well on the test. You can review each lesson at your own pace and use the video tags to return to review passages that require more attention.

12 Lessons in Chapter 36: Praxis Middle School Science: Biodiversity
Test your knowledge with a 30-question chapter practice test
What is Biodiversity? - Definition and Relation to Ecosystem Stability

1. 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.

Deforestation, Desertification & Declining Biological Diversity

2. 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.

Human Environmental Impact & Ecological Conservation

3. Human Environmental Impact & Ecological Conservation

The Earth has only so much space for us and our non-human neighbors. In this lesson, we will learn about how humans impact the environment, what causes habitat fragmentation, and what ecological conservation can do to help.

Ecological Succession: From Pioneer to Climax Communities

4. 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

5. 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?

Overview of the Earth's Biomes

6. Overview of the Earth's Biomes

Biomes are defined both climatically and geographically as areas with similar factors, such as plants and animals, soil quality, and growing seasons. In this lesson, we'll learn about the five major categories of the Earth's biomes.

Freshwater Biomes: Climate, Locations, Plants & Animals

7. Freshwater Biomes: Climate, Locations, Plants & Animals

Freshwater biomes are very important to life on Earth. They are home to many different species and provide a lot of resources. In this lesson, we will go over what a freshwater biome is, where they are located, and the different plants and animals that inhabit them.

Ecosystems of Oceans and Freshwater: Biological Diversity and Water

8. Ecosystems of Oceans and Freshwater: Biological Diversity and Water

In this lesson, you'll learn about the biodiversity of ecosystems based on water. You will discover that marine, freshwater and a mixture of salt and freshwater create very different ecosystems, which in turn influence the amount of biodiversity that is found in these habitats.

Biogeochemical Cycling and the Phosphorus Cycle

9. 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.

Cycles of Matter: The Nitrogen Cycle and the Carbon Cycle

10. Cycles of Matter: The Nitrogen Cycle and the Carbon Cycle

Matter is constantly cycled between living and nonliving parts of the environment. Processes like photosynthesis and nitrogen fixation allow the carbon and nitrogen cycles to regenerate needed substances by recycling Earth's atoms.

Renewable & Non-Renewable Resources: Definition & Differences

11. Renewable & Non-Renewable Resources: Definition & Differences

We use a variety of Earth's resources, but not all of them will be around forever. This lesson explains the difference between resources that can be regenerated for our use and those that are gone after they are used once.

Fossil Fuels, Greenhouse Gases, and Global Warming

12. 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.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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