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Ch 51: Ecological Challenges - ORELA Middle Grades General Science

About This Chapter

Boost your comprehension of ecological challenges to improve your chances of succeeding on the ORELA Middle Grades General Science assessment. Short lessons and self-assessment quizzes can reacquaint you with this subject area.

Ecological Challenges - ORELA Middle Grades General Science - Chapter Summary

This chapter offers resources you can use to simplify the process of studying topics related to humans, animals and the environment for the ORELA Middle Grades General Science assessment. Watch the video lessons to ensure you can answer questions on the exam that address:

  • Understanding how introduced and invasive species alter ecological balance
  • Analyzing biogeochemical cycling and the phosphorus cycle
  • Exploring the nitrogen cycle, acid rain and fossil fuels
  • Discussing the carbon cycle and long-term carbon storage
  • Examining human impacts on the environment

Expert instructors provide the detailed explanations you need to better understand ecological challenges. Review the lessons in video or written form and take advantage of easily identifiable vocabulary words that provide further insight into the subject matter.

Ecological Challenges - ORELA Middle Grades General Science Objectives

The ORELA Middle Grades General Science assessment gauges your science comprehension to determine whether you qualify for Oregon educator licensure. Earning a passing score of 228 or higher on the exam enables you to teach general science to students in middle grades. The computer-based test consists of 150 multiple-choice questions and lasts three hours.

Topics covered in this chapter are found in the life science content domain, which constitutes about 25% of the total test. You can prepare for questions in this section by reviewing the lessons, then taking self-assessment quizzes to test your comprehension. Questions on the quizzes are similar in format and content to those found on the test.

5 Lessons in Chapter 51: Ecological Challenges - ORELA Middle Grades General Science
Test your knowledge with a 30-question chapter practice test
How Introduced and Invasive Species Alter Ecological Balance

1. 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?

Biogeochemical Cycling and the Phosphorus Cycle

2. 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.

The Nitrogen Cycle, Acid Rain and Fossil Fuels

3. 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

4. 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.

Human Impacts on the Environment

5. Human Impacts on the Environment

The human population continues to grow, but the size of Earth and the resources available for our use are limited. Humans greatly impact the world around them, and our actions can and often do have dramatic and long-lasting consequences.

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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Other Chapters

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