DAY 139

VIDEO for today: https://youtu.be/SM9KGQOcj3I

Goals: SWBAT...

1. Obtain a baseline score for understanding of wave properties, wave vocabulary, and wave effects

Warm-Up (5min): 

    A. Define the term, "wave"

    B. Write a list of characteristics that you could use to describe the physical qualities of a wave. 

        Describe each characteristic in words that any person could understand. Leave some writing space for characteristics that you might think of later during the activity

        Example: The height of the wave

        See if you can think of at least four qualities, including the one I gave you

CLASSWORK

1. #139A: Review Day 138 Warm-Up

1. Give three examples of how waves show up in your daily life

    -Potential Answers: talking and listening, water waves in the bathtub or at the beach, your cellphone signal, feeling vibrations in the ground when someone jumps or a large vehicle drives by, ....

2. What is light made of?

    - So, there is an answer, which generally lead to more questions. Light isn't a physical thing that you can hold or touch, but it instead an electromagnetic wave. It's massless, and depending on how closely you're looking at the energy, can either be explained as behaving like a wave or behaving like a particle. This is described pretty well here: https://www.youtube.com/watch?v=h1tflE-L2Dc But this leads to more questions, like what kind of particle is light. Answer, photon. And how does a particle have zero mass?  Answers....LINK

3. What do your eyes detect when you "see" something? LINK

4. How does a bat "see"? Echolocation

2. #139B: Knowledge Inventory: Waves

Your inventory is on Schoology. You'll likely find it helpful to watch the video below, as I act out a few of the questions. I couldn't upload all the images to Schoology, so those are here: https://docs.google.com/presentation/d/1DESXKzmjX8rYJf33Xv5bX_hE_JV6Mq0qQCAUStOGHj0/edit?usp=sharing

Video: https://www.youtube.com/watch?v=lTHgiC60ajE

ESSENTIAL QUESTION: How do waves interact?

GOALS: SWBAT...

1. define standing wave, constructive interference, and destructive interference

2. create waves which show a standing wave, constructive interference, and destructive interference

WARM-UP

1. Suppose you set up a standing wave with four segments (as shown on board). What if you shake the wave with twice the frequency? 

    a. how many wave segments will occur in the new standing wave?

    b. how many wavelengths will there be?

2. Is it possible for one wave to cancel another wave so their combined amplitude is zero. Draw two waves that could show this concept.

CLASSWORK

139A: Wave Interactions Lab

    - Share lab with me using this format: P1 - Wave Interactions Lab - Your Name

    - Complete 5 definitions

    - check out materials    

    - LINK

HOMEWORK

- Complete the lab write up. Due electronically by Fri 11:59pm

  in addition to the above questions, answer the following: 

    C1. How does a wave transfer energy?

    C2. Define "Amplitude"

    C3. Define "Frequency"

    C4. Define "wavelength"

    C5. Define "period"

    C6. What does transverse mean? (Think about what the word part "trans-" means...)

    C7. What does longitudinal mean? (Think about latitude and longitude...)

    C8. Consider sound. Define "pitch'

    C9. When a wave strikes an object, what happens to the energy in the wave (hint, more than one answer)

    C10. Describe the Doppler Effect

    C11. What are the three primary colors?

    C12. Write the colors of visible light in order from longest wavelength to shortest wavelength