About This Chapter
ILTS Biology: Waves, Sound and Light - Chapter Summary
This chapter's lessons offer a review of various types of waves, sound and the nature of light, among other topics. Our video lessons go over concepts that you'll encounter on the ILTS Biology test, including:
- Components and parameters of waves
- Definition of sound and electromagnetic waves
- Pitch and volume
- Spectrum and color frequency
- Reflection and white light
- Resonance and transparency
- Refraction and constructive interference
- The Doppler effect
- Wave-particle duality
Our study guide offers a number of tools to help you succeed on the ILTS Biology exam. In addition to lively video lessons, the instructors have provided lesson transcripts with the important terms and topics highlighted. The videos include a clickable timeline that you can use to quickly return to specific parts of the lesson for review.
ILTS Biology: Waves, Sound & Light Chapter Objectives
The ILTS Biology test assesses your understanding of basic science concepts, and passing it is one of Illinois' requirements for a certificate to teach the subject. The exam's questions are divided into six subareas. Questions on the material covered in this Waves, Sound and Light chapter are part of the exam's physical science subarea.
All of the 125 questions on the computer-based exam are in multiple-choice form, requiring you to read a question and select the best answer from several options. The short quizzes that follow our lessons also have multiple-choice items, so completing them will give you practice answering questions in this format. In addition, the quizzes provide an opportunity to evaluate your learning and see where you need additional study.
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.
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.
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.
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.
5. Reflection: Angle of Incidence, Curved Surfaces & Diffusion
How does light bounce off surfaces? Learn the differences between how light bounces off flat surfaces, curved surfaces, and non-shiny surfaces. Then reflect on your reflection knowledge with a quiz.
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!
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.
8. 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.
9. 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.
10. 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.
11. 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.
12. 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.
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