Ch 41: Praxis Middle School Science: Biodiversity

About This Chapter

Learn about 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. These video lessons and quizzes will help you study for the following types of test questions:

  • Defining biodiversity
  • Explaining how biodiversity is related to ecosystem stability
  • Reporting on declines in biological biodiversity
  • Analyzing ways that introduced and invasive species influence the ecological balance
  • Describing cycles of matter, biogeochemical cycling and the Earth's biomes
  • Contrasting renewable and nonrenewable resources
  • Identifying the impact of greenhouse gases and fossil fuel use on global climate change

Led by expert instructors, you'll get 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.

Objectives of the Praxis Middle School Science: Biodiversity Chapter

Many states require the Praxis Middle School Science exam of anyone seeking certification to teach the subject. This test is administered by computer. It has 125 total questions, and those on biodiversity are in the section on Earth and Space Sciences, which comprises 18% of the total test.

All questions on the Praxis Middle School Science exam are multiple-choice, like those on the quizzes at the end of our lessons. These quizzes let you assess your knowledge and also gain practice taking this type of computer-based multiple-choice exam.

12 Lessons in Chapter 41: 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.

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.

Cycles of Matter: The Nitrogen Cycle and the Carbon Cycle

8. 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

9. 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

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.

Freshwater Biomes: Climate, Locations, Plants & Animals

11. 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

12. 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.

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.

Other Chapters

Other chapters within the Praxis Middle School Science (5440): Practice & Study Guide course

Support