Bell-ringer: 5 minutes If waves of water ripple and intersect (cross), what could be the result? The waves fight each other and disappear c) The waves join and become larger b, d) Both might happen because _(explain why)_

Stations Expectations You must record all your work for your group Take turns writing Put down the station name/ number Write the questions if you have time Answer all questions at your station You should all be thinking and helping discuss ideas You have 4 minutes in each station When I call time to rotate, you must have moved within 5 seconds to your new seats If you misuse a station or its materials, it will be removed

Station Topics Wave Frequencies Light in Rainbows Music Sound Waves Voice Test Animals and Sound Waves Scientist Experiences Review Questions Brain Brake/Stump Ms. K

Wave Frequency Station (1) Look at how energy, wavelength, and frequency are related by analyzing the following formulas and image (on back). Place the two formulas and image into your notes if you have time. Which variables have a direct relationship? Energy and frequency Wavelength and frequency f

2. Waves with a short wavelength are: a. Closer with less energy b 2. Waves with a short wavelength are: a. Closer with less energy b. Closer with more energy c. Farther with less energy d. Farther with more energy

Light Diffraction & Rainbows Station (2) Using the images, try to explain how white light in a wave spreads to create a colorful rainbow. When else might you notice waves of light?

Ask Ms. K Station (3) Try to stump the teacher or get some clarity on things you are confused about or interested in about light and sound waves (If you stump me, that means I don’t know the answer; You may get some extra credit)

Music and Sound Waves Station (4) If you hear a higher pitch from a trumpet than a saxophone, how do the wavelengths differ? How does the amplitude of a wave change if the sound is louder?

Music and Sound Waves Station (4) 3. The piano string tuned to middle C vibrates with a frequency of 264Hz. Assuming the speed of sound in air is 343m/s, find the wavelength of the sound produced by the piano string.

How Sound Waves Travel (5) Have your friend hold one cup while you hold the other, stretching the string tightly between you. Hold the cup to your ear while your friend talks into his cup. Why do you think you can hear the sound at the other end of the string? Why do you think placing your phone in a cup when it plays music makes the sound seem louder?

Other Animals and Sound Waves Station (6) Listen to the clip of Howler monkeys calling each other. Describe the call’s frequency and pitch. Why might they use these calls? Dolphins can produce sound waves with frequencies ranging from 0.25kHz to 220kHz, but only those at the upper end are used in echolocation. Try to explain why high frequency waves might work better. Answer: Higher frequency calls bounce back with more detail for the animals to find their prey for food. 3. What other animals are famous for their sound waves? https://www.youtube.com/watch?v=REPoVfN-Ij4

Bats and Echolocation Station (7) Besides “flying foxes,” bats produce sound waves to find food. As they call, sound waves leave their mouths, bounce off of objects and insects, and return to the bat. They are special to have changes to their mouths and noses to help direct the sound as they call, and changes to their ears to collect sound back and yet not go deaf from all the noise! Summarize the facts in the short text into 20 words or less. What do you think bats would want to use: Sound waves in a high or low frequency? (More waves sent out means more detail about food!) Could they use both/Why or why not?

Brain Brake: Creativity Station (8) Color one picture of a rainbow as a group. Colors with longer wavelengths go on top. Which is more dangerous? A microwave, UV light, or X-rays? Write a mini-story about that type of wave affecting people.

Test Prep Station (9) 1. State in each comparison which kind of wave has more energy. a) X-Rays or b) Visible Light a) High pitch or b) Low Pitch a) Red light or b) Violet light 2. Make a list of physics questions that you have. We can address them in a review later. Answers: 1a, 2a, 3b

Point of View Station (10) Read the job description Describe, using point of view, what it might be like to be the scientist working on the team You have the perfect summer job with a team of marine biologists studying dolphin communication off the coast of Hawaii. The work area is incredibly beautiful. You work together with your team to place special microphones in the water to pick up any dolphin calls. When they make sounds underwater, the sound bounces off the ocean floor and any rocks until it gets picked up by the microphones and sent to you. Sometimes, you also pick up noises from traveling boats in the water. Whenever the boats go by, the dolphins make new sounds you’ve never heard before. It seems new and exciting to study, but sometimes you wonder how it must feel to be the dolphin stuck in all that noise down there…

Last Items/ Questions Extra Credit: Power Usage Logs (on website) due Wed. Extra Wave Information: P. 74 http://www.glencoe.com/sites/common_assets/science/workbooks/mississippi/msseg7.pdf Need Physics help or want to talk about your grades? Office Hours Saturday 10:30-11:30 @ The Public Library

GO GO FEEDBACK FRONTIER! Miss K – In my baggie (Comments on my teaching, living up to my goals, and any personal things you need to privately tell me) Your peers – Feedback to 1 or 2 people… What is something you saw him/her do that matched up with our class values? Why was it really great to see this?