Bellringer 5 minutes If waves of water ripple

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

Volunteering for Connections Friday a) Explain how magnets or a compass works (Students may bring these items in to class if desired) OR b) Try to come up with how the idea of waves could be used in a new way to accomplish something.

Physics Study Guide Extra Credit: Due Monday 1. 2. 3. 4. 5. Formulas Vocabulary Main topics Techniques to Solve problems Sample questions

Wave Frequency Station (1) • Look at how energy, wavelength, and frequency are related by analyzing the following formulas and image (on second sheet). 1. Which variables have a direct relationship? a) Energy and frequency b) Wavelength and frequency

Light Diffraction & Rainbows Station (2) 1. Using the images, try to explain how white light in a wave spreads to create a colorful rainbow. 2. 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

Music and Sound Waves Station (4) 1. If you hear a higher pitch from a trumpet than a saxophone, how do the frequencies of the sound waves from the trumpet compare with those from the saxophone? 2. IF TIME: The piano string tuned to middle C vibrates with a frequency of 264 Hz. Assuming the speed of sound in air is 343 m/s, find the wavelength of the sound produced by the piano string.

Other Animals and Sound Waves Station (5) 1. Listen to the clip of Howler monkeys calling each other. Describe the call’s frequency and pitch. Why might they use these calls? 2. Dolphins can produce sound waves with frequencies ranging from 0. 25 k. Hz to 220 k. Hz, 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?

Bats and Echolocation Station (6) • 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! 1. 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!) 2. Could they use both/Why or why not?

Test Prep Station (7) 2. Make a list of physics questions that you have. We can address them in the review tomorrow. Answers: 1 a, 2 a, 3 b 1. State in each comparison which kind of wave has more energy. I. a) X-Rays or b) Visible Light II. a) High pitch or b) Low Pitch III. a) Red light or b) Violet light

Brain Brake: Coloring Station (8) 1. Color one picture of a rainbow as a group. Colors with longer wavelengths go on top. 2. Since colors can separate, color your own leaf in a shade that will be reflected in fall. (We see the light that is reflected. )

Last Items/ Questions • Extra Credit: Power Usage Logs (on website) • Extra Wave Information: P. 74 http: //www. glencoe. com/sites/common_assets/science /workbooks/mississippi/msseg 7. pdf • Need Physics help or want to talk about your grades? – Office Hours Saturday 12 -1 @ Mc. Donald’s

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?