Chapter 5, Section 2 Making Waves

February 10, 2014 HW: PTG #1, 2, 5-8, pg. 505-506, Due Next Wednesday/Thursday Learning Objective: Describe how waves carry energy Describe how wavelength, frequency and speed of a wave are related Success Criteria: Observe the motion of a pulse Calculate the speed of a wave pulse Observe standing waves Investigate the relationship among wave speed, wavelength, and frequency Make a model of wave motion Distinguish between transverse and longitudinal waves Do Now: Write LO and SC on a new left-side page WDYS/WDYT pg. 492

WDYS? WDYT? T-chart

February 10, 2014 HW: PTG #1, 2, 5-8, pg. 505-506, Due Next Wednesday/Thursday Learning Objective: Describe how waves carry energy Describe how wavelength, frequency and speed of a wave are related Success Criteria: Observe the motion of a pulse Calculate the speed of a wave pulse Observe standing waves Investigate the relationship among wave speed, wavelength, and frequency Make a model of wave motion Distinguish between transverse and longitudinal waves Do Now: Grab physics books (pg. 492) Take out your notebooks and quietly review the WDYS? WDYT? That was completed last class.

Investigate: Part A Stadium Wave Standing Wave Investigation 5.2 Making Waves handout

Part A Big Idea Summary Answer the following on a half sheet of paper by writing down the entire sentence frame and answering in complete sentences 1. The wave moves _____________, but people move _________ and __________. 2. Waves are produced by neighboring ___________ moving up and down, causing the wave to move ___________. 3. Which learning objective do your answers directly relate with?

Investigate: Part B Transverse Waves Demo #1-2 (answer questions) demo 3-4 answer question #6-7-in groups #7-choose amplitude as a class Prediction: How do you think amplitude will affect the speed of the wave? Groups 1-2, 3-4, 5-6 different amplitudes

Exit ticket Turn in Investigation 5.2 Making Waves handout

February 13, 2014 HW: PTG #1, 2, 5-8, pg. 505-506, Due Fri Learning Objective: Describe how waves carry energy Describe how wavelength, frequency and speed of a wave are related Success Criteria: Observe the motion of a pulse Calculate the speed of a wave pulse Observe standing waves Investigate the relationship among wave speed, wavelength, and frequency Make a model of wave motion Distinguish between transverse and longitudinal waves Do Now: How would you know if you were observing a transverse wave?

February 12/13, 2014 HW: PTG #1, 2, 5-8, pg. 505-506, Due Fri Learning Objective: Describe how waves carry energy Describe how wavelength, frequency and speed of a wave are related Success Criteria: Observe the motion of a pulse Calculate the speed of a wave pulse Observe standing waves Investigate the relationship among wave speed, wavelength, and frequency Make a model of wave motion Distinguish between transverse and longitudinal waves Do Now: Once bell rings it needs to be quiet and people seated in their assigned seats with a text book Read procedures #10-13, pgs 495-6, SILENTLY!! You will be getting a work habits grade today based off of following directions and remaining on task

#10-13 Demo then in groups #14-Demo, discuss energy #15-groups, discuss A transverse pulse is one in which the motion of the wave is perpendicular (90 degrees) to the motion of the particles of the medium As the amplitude of a transverse pulse on a spring increases, its speed remains the same As the frequency of a standing wave increases, the wavelength decreases and the wave velocity remains the same.

January 11, 2011 HW: PTG #1, 2, 5-8, pg. 505-506, Due Wed, Bring Tissues Learning Objective: Describe how waves carry energy Describe how wavelength, frequency and speed of a wave are related Success Criteria: Observe the motion of a pulse Calculate the speed of a wave pulse Observe standing waves Investigate the relationship among wave speed, wavelength, and frequency Make a model of wave motion Distinguish between transverse and longitudinal waves Do Now: LO and SC reflection Go through what we have covered so far and write page #s next to each item How do you know you have met this success criteria or learning objective? On left side page

Part B Big Ideas Transverse Wave: Standing Wave: Speed of a wave=distance/time Speed=frequency x wavelength Frequency=#times the wave moves up and down each second Energy travels in waves

Investigate: Part C Longitudinal Waves Complete all sections, OK with teacher

Part C Big Ideas Compressional/Longitudinal Waves

Investigate: Part D Skip

February 14, 2011 HW: PTG #1, 2, 5-8, pg. 505-506, Due Tues Learning Objective: Describe how waves carry energy Describe how wavelength, frequency and speed of a wave are related Success Criteria: Observe the motion of a pulse Calculate the speed of a wave pulse Observe standing waves Investigate the relationship among wave speed, wavelength, and frequency Make a model of wave motion Distinguish between transverse and longitudinal waves Do Now: Describe how wavelength, frequency, and speed of a wave are related. Suppose you shake a long, coiled spring back and forth. Then you shake it rapidly. Describe how the waves change as you shake the coiled spring more rapidly. What wave characteristics (amplitude, wavelength, frequency, and speed) change? What wave characteristics did not change?

Physics Talk: Vocab Sheet Waves Transfer Energy Example A wave transfers energy with no transfer of mass When you throw a ball the mass and kinetic energy move from one place to another A wave transfers only energy, no mass is moving.

Physics Talk: 2 column notes How is energy transferred? Chemical energy in musclesmechanical energy in armkinetic energy in spring Energy transferred from one form to another, but TOTAL energy remains the same…Conservation of Energy!

Physics Talk: 2 Column notes They continue to travel as though the other wave never existed. http://www.youtube.com/watch?v=Xqo6sEt1cUE · A B What will this look like when the pulses meet? After that meet? How do waves “add”?

Physics Talk: Vocab Sheet Periodic Wave Crest Trough Amplitude Repetitive series of pulses Highest point on a periodic wave Lowest point on a periodic wave Height of crest or depth of trough

Physics Talk: 2 Column Notes How does amplitude relate to sound? How does amplitude relate to energy? Large amplitudeLoud sound! Small amplitudesoft sound Large amplitudeLarge amount of energy Small amplitudesmall amount of energy

Physics Talk: Vocab Sheet Wavelength (λ) Frequency (f) Distance between two consecutive crests or troughs Symbol is λ (pronounce lambda) Number of waves per unit time Usually waves/sec called hertz (Hz)

Wavelength Practice In the diagram below, what is the wavelength of this standing wave? 12m

Physics Talk: Vocab Sheet Period (T) Time required to complete one complete wave (crest-trough-crest) Period and frequency are inversely proportionate T=1/f f=1/T

Period Practice What is the period if 8 waves are produced each second? What is the period if 5 waves are produced in 10 seconds?

Physics Talk: Vocab Sheet Transverse Waves Compressional (Longitudinal) Wave The medium moves perpendicular to the direction of the wave The medium moves parallel to the direction of the wave http://www.youtube.com/watch?v=MoVz2ENJb8M

Physics Talk: Vocab Sheet Standing Wave Wave pattern that remains in a constant position. Does not go right/left, but does go up/down. http://www.youtube.com/watch?v=03cUrkjqdE0

Physics Talk: 2 Column notes What type of wave is sound? Compression Wave Air molecules get compressed and move through the air

Physics Talk: 2 column notes How can you calculate the speed of a wave? Speed=Distance/Time Wave speed=wave frequency x wavelength v=fλ Sample problems on pg. 502

January 12, 2011 HW: Finish Vocab Boxes Learning Objective: Describe how waves carry energy Describe how wavelength, frequency and speed of a wave are related Success Criteria: Observe the motion of a pulse Calculate the speed of a wave pulse Observe standing waves Investigate the relationship among wave speed, wavelength, and frequency Make a model of wave motion Distinguish between transverse and longitudinal waves Do Now: Finish LO and SC reflection Go through what we have covered so far and write page #s next to each item How do you know you have met this success criteria or learning objective? On left side page Essential Questions Pg. 504 What does it mean? How do you know? Why should you care?

Essential Questions Pg. 504 What does it mean? How do you know? Why should you care?

Vocabulary Activity Book Definition: Definition in YOUR words Example Picture or Equation

HW: PTG #1, 2, 5-8, pg. 505-506