Ch 29: Electromagnetic Spectrum - ORELA Middle Grades General Science

About This Chapter

Review short video lessons to get a better grasp of the electromagnetic spectrum as you prepare for the ORELA Middle Grades General Science assessment. Short quizzes and a chapter exam can reinforce concepts learned in this chapter.

Electromagnetic Spectrum: ORELA Middle Grades General Science - Chapter Summary

The lessons in this chapter provide a comprehensive overview of the electromagnetic spectrum. Watching the videos before taking the ORELA Middle Grades General Science assessment ensures that you're ready to:

  • Define and identify the sources and properties of electromagnetic waves
  • List the 7 major regions of the electromagnetic spectrum
  • Explain the origin, spectrum and color frequency of light
  • Discuss reflection as it relates to angle of incidence and curved surfaces
  • Provide the meaning of diffuse reflection and resonance
  • Describe transparent and opaque materials in electromagnetic waves

Explore the definitions, properties and examples of the electromagnetic spectrum so you can confidently answer related questions on the exam. After reviewing the lessons, if you have questions, feel free to submit them to our experts.

Electromagnetic Spectrum: ORELA Middle Grades General Science Chapter Objectives

The ORELA Middle Grades General Science assessment is a computer-based test that consists of 150 multiple-choice questions. This chapter's topics are found in the physical science content domain of the assessment, which constitutes about 31% of the total test. Use the resources in this chapter to increase your chances of success in this section and improve your odds of earning a 228 or higher on the exam.

Some resources in this chapter include video lessons with transcripts featuring easy-to-identify vocabulary words. You can also take advantage of lesson quizzes that gauge your comprehension of concepts covered. If you want a broader review of the lessons, take the chapter exam. Success on the test ensures your ability to secure educator licensure and teach general science in the middle grades classroom.

7 Lessons in Chapter 29: Electromagnetic Spectrum - ORELA Middle Grades General Science
Test your knowledge with a 30-question chapter practice test
Electromagnetic Waves: Definition, Sources & Properties

1. Electromagnetic Waves: Definition, Sources & Properties

In this lesson, learn the basics of electromagnetic waves and how they make up the electromagnetic spectrum. We will explore the major trends and categories within the spectrum, as well as the various sources of electromagnetic waves.

The 7 Major Regions of the Electromagnetic Spectrum

2. The 7 Major Regions of the Electromagnetic Spectrum

This lesson will walk you through each of the major regions of the electromagnetic spectrum. Explore the unique characteristics of X-rays, microwaves, radio waves, UV rays, infrared, gamma rays, and of course, visible light.

The Nature of Light: Origin, Spectrum & Color Frequency

3. The Nature of Light: Origin, Spectrum & Color Frequency

This lesson introduces the basics of visible light and color. Learn how the visible light spectrum is divided into the six color ranges. We'll also discuss why different people name colors in different ways.

Reflection: Angle of Incidence and Curved Surfaces

4. Reflection: Angle of Incidence and Curved Surfaces

How do waves reflect off of surfaces? How do we account for the images that we see reflected in various objects? Discover the answers to these questions as we investigate the rays and angles defining the law of reflection.

Diffuse Reflection: Definition, Examples & Surfaces

5. Diffuse Reflection: Definition, Examples & Surfaces

This lesson explores the law of reflection and how it applies to different surfaces and wave types. We'll learn the difference between specular and diffuse reflection and investigate how diffuse reflection affects our perception of sound and light.

Resonance: Definition & Transmission of Waves

6. Resonance: Definition & Transmission of Waves

This lesson describes how sound and light waves are affected by the principle of resonance. Learn how resonance occurs through the vibrations and resonant frequencies of objects. You'll investigate everyday examples of resonance and learn how to break a wine glass with your voice!

Transparent and Opaque Materials in Electromagnetic Waves

7. Transparent and Opaque Materials in Electromagnetic Waves

What makes an object transparent or opaque? How does light pass through some objects and not others? And what about the other types of electromagnetic waves? We'll investigate all these questions in this lesson about the transparency and opacity of materials.

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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