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Ch 15: Praxis Middle School Science: Waves & Optics

About This Chapter

Use this chapter's video lessons to take another look at wave parameters and wave behaviors covered on the Praxis Middle School Science exam. Topics of instruction include wave reflection and refraction, the Doppler effect, and the nature of visible light.

Praxis Middle School Science: Waves & Optics - Chapter Summary

Re-examine the properties of sound and electromagnetic waves with this Praxis Middle School Science chapter. You'll find video lessons and quizzes that can get you ready for exam questions on the following topics:

  • Wave types and parameters
  • Sound wave pitch and volume
  • Properties of electromagnetic waves
  • The origin and nature of light
  • Wave reflection and resonance
  • Transparency and opacity
  • Refraction
  • Dispersion and diffraction
  • The differences between destructive and constructive interference
  • The Doppler effect
  • Wave-particle duality

This chapter is full of illustrations designed to help you visualize wave parameters and behaviors covered on the Praxis test. Review these concepts at home or anywhere you take your laptop, tablet, or smartphone. The video lessons and transcripts are completely self-paced, and the multiple-choice quizzes can be completed as many times as you need to feel confident for exam day.

Praxis Middle School Science: Waves & Optics Chapter Objectives

The Praxis Middle School Science exam is used to measure aspiring teachers' knowledge in six main content areas, including the physical sciences. Lessons in this chapter can prepare you for test questions focusing on such topics as the regions of the electromagnetic spectrum, wave parameters, wave phenomena, and the characteristics of light and sound waves.

Altogether, these and other physical sciences questions on electricity, magnetism, mechanics, and chemistry make up around 18% of the exam's 90 multiple-choice questions and one of three constructed-response questions.

15 Lessons in Chapter 15: Praxis Middle School Science: Waves & Optics
Test your knowledge with a 30-question chapter practice test
Waves: Components, Types & Parameters

1. Waves: Components, Types & Parameters

After completing this lesson, you will be able to explain what a wave is, describe the various types of waves and measure their features, like components and parameters. A short quiz will follow.

Sound: Definition, Influences, Pitch & Volume

2. Sound: Definition, Influences, Pitch & Volume

What is a sound? Learn about sounds and what influences how we perceive them, including pitch and volume. Test your understanding of sound features and finish off with a quiz.

Electromagnetic Waves: Definition, Sources, Properties & Regions

3. Electromagnetic Waves: Definition, Sources, Properties & Regions

Electromagnetic waves power everything from your computer's Internet connection to your radio to atomic weapons. In this lesson, we'll look at the entire spectrum, as well as how they are formed and characteristics of each group of waves.

The Nature of Light: Origin, Spectrum & Color Frequency

4. 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

5. 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.

Mirrors: Difference Between Plane & Spherical

6. Mirrors: Difference Between Plane & Spherical

After watching this lesson, you will be able to explain what a mirror is and how plane mirrors and spherical mirrors are different, including the images they produce. A short quiz will follow.

Concave Lens: Definition & Uses

7. Concave Lens: Definition & Uses

Convex lenses get all the glory. They are used for magnification, in cameras, and in countless other devices. Concave lenses, on the other hand, are often underappreciated. In this lesson, discover what concave lenses are and what they are used for.

Thin Lenses: Types & Measurement

8. Thin Lenses: Types & Measurement

We are around many thin lenses throughout our daily lives, but most of us don't really know what this means. In this lesson, we'll explore the measurements of lenses, the common types of thin lenses, and the different ways they affect light.

Resonance: Definition & Transmission of Waves

9. 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

10. 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.

Color: White Light, Reflection & Absorption

11. Color: White Light, Reflection & Absorption

What gives color to objects? How do light waves interact with materials to produce red and green or white and black? In this lesson, learn how white light is composed of all colors and how absorption and reflection influence our color perception.

Refraction, Dispersion & Diffraction

12. Refraction, Dispersion & Diffraction

Learn about light waves and how they can be affected by objects. Explore the difference between refraction, dispersion, and diffraction. Take the quiz to see how much you can remember.

Constructive and Destructive Interference

13. Constructive and Destructive Interference

What happens when one wave meets another? Do the waves converge to make one giant wave? Or, do they destroy each other? In this lesson, we'll explore the workings of wave interference.

The Doppler Effect: Definition, Examples & Applications

14. The Doppler Effect: Definition, Examples & Applications

What is the Doppler effect? How does it affect our perceptions of sound and light? In this lesson, learn how traveling wave sources can change the way we observe sound and light waves. Explore the applications of the Doppler effect on shock waves, sonic booms, and the movements of distant galaxies.

Wave-Particle Duality: Concept, Explanation & Examples

15. Wave-Particle Duality: Concept, Explanation & Examples

Is light a particle with mass and substance? Or, is it just a wave traveling through space? Most scientists say light is both a particle and a wave! Find out how they came to this strange conclusion as we learn about the theory of wave-particle duality.

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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