# ALEX Classroom Resource

## Sound: Crash Course Physics #18

Classroom Resource Information

Title:

Sound: Crash Course Physics #18

URL:

https://aptv.pbslearningmedia.org/resource/sound-crashcourse-2018/sound-crash-course-physics/

Content Source:

PBS
Type: Audio/Video

Overview:

We learn a lot about our surroundings thanks to sound. In this episode of Crash Course Physics, Dr. Shini goes over some of the basics (and some of the not so basics) of the Physics of Sound.

Content Standard(s):
 Science SC2015 (2015) Grade: 9-12 Physics 8 ) Investigate the nature of wave behavior to illustrate the concept of the superposition principle responsible for wave patterns, constructive and destructive interference, and standing waves (e.g., organ pipes, tuned exhaust systems). a. Predict and explore how wave behavior is applied to scientific phenomena such as the Doppler effect and Sound Navigation and Ranging (SONAR). Unpacked Content Scientific And Engineering Practices:Planning and Carrying out InvestigationsCrosscutting Concepts: Structure and FunctionDisciplinary Core Idea: Waves and Their Applications in Technologies for Information TransferEvidence Of Student Attainment:Students: Investigate the nature of wave behavior. Illustrate the concept of the superposition principle responsible for wave patterns. Illustrate the concept of the superposition principle responsible for constructive and destructive interference. Illustrate the concept of the superposition principle responsible for standing waves. Explore and explain how wave behavior is applied to scientific phenomena such as the Doppler Effect and Sound Navigation and Ranging (SONAR). Predict what the wave pattern would be for an object at rest or an object moving toward or away from an observer using the Doppler Effect and SONAR.Teacher Vocabulary:model Doppler Effect constructive interference destructive interference standing wave superposition principle wave wave speed frequency period speed of light speed of sound wavelength medium SONAR RADAR Red shift ultrasound crest trough amplitude node antinode sound mechanical electromagnetic compression rarefaction longitudinalKnowledge:Students know: The concept of the superposition principle. The relationship among frequency, wavelength and speed. The relationship between frequency and pitch. The relationship between wavelength and color.Skills:Students are able to: Illustrate/model the concept of the superposition principle responsible for wave patterns. Illustrate/model waveforms to show interference. Illustrate/model waveforms to show standing waves. Explore wave behavior. Make predictions about wave behavior as applied to phenomena such as Doppler and SONAR. Locate information from multiple sources.Understanding:Students understand that: When waves interfere they form wave patterns predicted by the law of superposition. Wave behavior, known as the Doppler Effect, can be used to determine the relative speed of objects producing or reflecting waves.AMSTI Resources:ASIM Module: Wave Behavior; Vibrating String; Doppler Demo; Properties of Sound; Palm Pipes; Speed of Sound; Spectrum of Stars; Double Slit Diffraction
Tags: compression, decibels, doppler effect, energy, expansion, physics, pitch, sound, wave
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This resource provided by:
 Author: Stephanie Carver