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Ch 14: MTLE Middle Level Science: Interdependence, Energy Flow & Ecosystems

About This Chapter

As a middle level science teacher, you'll need expansive knowledge of related topics, including interdependence, energy flow and ecosystems. Use this chapter to brush up before tackling the MTLE Middle Level Science examination. Quizzes are included.

MTLE Middle Level Science: Interdependence, Energy Flow and Ecosystems - Chapter Summary

Text and video lessons comprise this educational chapter on interdependence, energy flow and ecosystems. You've likely already studied these topics at length, but the lessons can serve to remind you of how organisms within ecosystems rely on one another for survival. The lessons note the distinctions between species diversity and species richness, and they explain the process of photosynthesis. Review this chapter in order to:

  • Explain the elements that contribute to species richness
  • Understand the diversity of ecosystems within freshwater, lakes and oceans
  • Describe the diversity of ecosystems in temperate forests and rainforests
  • Explore the biodiversity and characteristics of hot and cold desert ecosystems
  • Define and compare biotic and abiotic factors
  • Discuss the ecosystem ecology field of study
  • List the components of a food web
  • Explain the purpose of decomposers
  • Examine the process of ecological succession

The flexibility of this program of study allows you to learn online 24/7 at your own pace. Make the most of your review time by utilizing the video tags to jump quickly from one topic to the next. They can be accessed by clicking the timeline link. Ideal for those who prefer to learn by reading, the text lessons also highlight important keywords. Our short lesson quizzes consist of five questions, and corresponding worksheets of your quiz answers can be printed out for future reference.

MTLE Middle Level Science: Interdependence, Energy Flow and Ecosystems Chapter Objectives

Each of the MTLE Middle Level Science examination's two subtests feature two subareas that you'll have to complete. The equivalent of 57% of the test weighting, Subarea I of Subtest 2 is titled Life Science. During this portion of the computer-based examination, you'll be evaluated on your ability to understand interdependence in ecosystems as well as the abiotic and biotic characteristics of various habitats. You'll also need thorough knowledge of decomposers and food webs. Subtest 1 and Subtest 2 both have about 50 multiple-choice questions, and each should be finished within a one-hour time limit.

10 Lessons in Chapter 14: MTLE Middle Level Science: Interdependence, Energy Flow & Ecosystems
Test your knowledge with a 30-question chapter practice test
Species Richness: Definition & Determining Factors

1. Species Richness: Definition & Determining Factors

In this lesson, you'll learn what species richness is and what factors can influence the index of species richness. You'll also discover why it is an important index to measure in terms of conservation.

Ecosystems of Oceans and Freshwater: Biological Diversity and Water

2. 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.

Biological Diversity and the Forest: Ecosystems of the Rainforests and Temperate Forests

3. Biological Diversity and the Forest: Ecosystems of the Rainforests and Temperate Forests

In this lesson, you'll learn about three main types of forests found on earth: coniferous, deciduous and tropical rainforests. You'll also discover how the ecosystems where these trees are located affect the biodiversity within them.

Desert Ecosystems: How Biodiversity Impacts Hot and Cold Deserts

4. Desert Ecosystems: How Biodiversity Impacts Hot and Cold Deserts

In this lesson, you'll learn about the biodiversity that makes up a desert ecosystem. You will discover what makes a desert a desert and study the different plant and animal life that inhabit both hot and cold deserts.

What is Biotic? - Definition, Factors & Examples

5. What is Biotic? - Definition, Factors & Examples

In this lesson you will learn about the biotic components in an ecosystem and the biotic factors that affect organisms. You will also have a better understanding about why planet Earth is a pretty special place.

Abiotic Factors of an Ecosystem: Definition & Examples

6. Abiotic Factors of an Ecosystem: Definition & Examples

When it comes to ecosystems, a mountain, a river, and a cloud have more in common than you might think. Abiotic factors have specific and important roles in nature because they help shape and define ecosystems.

Ecosystem Ecology: Definition & Explanation

7. Ecosystem Ecology: Definition & Explanation

What powers life? How much energy do animals get from eating plants? What short- and long-term effects will climate change have on our environment? Asking questions such as these help ecologists better understand ecosystems and the processes within them.

What is a Food Web? - Definition & Explanation

8. What is a Food Web? - Definition & Explanation

This lesson will provide a definition of a food web, as well as describe its parts and discuss examples of different types. It will also explain the transfer of energy through a food web.

What is a Decomposer? - Definition & Examples

9. What is a Decomposer? - Definition & Examples

Decomposers are an often overlooked part of the natural world, but their job is an important one. Learn what decomposers are, what role they have in the environment and how people use them.

Ecological Succession: From Pioneer to Climax Communities

10. 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.

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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