Unit Goals: What is a wave? How do they act? How are do waves differ?
Goals: SWBAT...
1. describe which materials conduct sound faster, and which conduct sound slower.
2. connect wave frequency with sound pitch
3. write a sentence explaining the Doppler Effect
CLASSWORK
1. #067A: Wave Properties and Sound Quiz
Warm-Up (5min):
1. We've established that sound travels around 330-340m/s through air. Does sound travel that same speed through all media?
2. Is the density of the molecules the same in foam, air, water, and steel?
3. rank the density of the materials in #2, from high to low
CLASSWORK
1. #067B: Sound WebQuest
A. Speed of Sound: complete the task & answer the questions
Go to: https://www.nde-ed.org/EducationResources/HighSchool/Sound/speedinmaterials.htm
B: Pitch and Frequency Review
On your own (you can use your notes from Day 65):
1. What is frequency?
2. A high frequency produces what type of pitch?
3. Name an object that makes a high-pitched sound (you cannot use a whistle).
4. A low frequency produces a what type of pitch?
5. Name an object that makes a low-pitched sound (you cannot use a tuba).
Go to: https://www.nde-ed.org/EducationResources/HighSchool/Sound/frequencypitch.htm
Click on the various strings and observe how the pitch and frequency change. Read through the text on the webpage and provide answers to the following questions. Be sure to use correct academic vocabulary such as frequency, pitch, wavelength, diameter, tension, and density.
6. What happens when you make the string shorter?
7. What happens when you make the string longer?
8. What happens when you make the string thinner?
9. What happens when you make the string tighter?
10. What happens when you make the string looser?
C: The Doppler Effect
Go to Teachertube.com – search videos for “Doppler Effect” – DO NOT click on the adds that pop up at the top of the search results……………….scroll down a bit to view the videos on “Doppler Effect”. Also, sorry there are ads at the beginning of these videos…
1. Watch a couple (2 or more) different videos that are available on the Doppler Effect.
2. Show what the sound waves look like in an object not moving.
3. Show what the sound waves look like in a moving object.
4. Finish the statement: The Doppler Effect happens when a sound source moves ________________________
5. Finish the statement: If you are moving with the source of sound there is _____________________________
6. Explain what the Doppler Effect is, using appropriate academic vocabulary such as pitch, frequency, wavelength, longitudinal wave, etc.
At Home Learning (HW)
1. Complete #67B (if necessary)