1. Draw a 4 x 4 square on your paper. You should have 16 squares in total. 2. Using your Spectrum book and the information on the board fill each square with a vocabulary word. Not all vocabulary words will be highlighted. They maybe italicized. There are at least three words on the board to get you started.

Chapter 11 Examples Sound Wave Air (medium) Seismic Wave Earth (medium) Pond, ocean, sea, river Wave Water (medium) The material a wave travels through Mechanical wave(page 357) Medium

Chapter 11 Wave doesn’t travel through a medium Examples Light Radio A mechanical wave has particles that move perpendicular through a medium as the wave passes – like a light wave A mechanical waves that causes particles to vibrate parallel to the direction of wave motion – like a sound wave Electromagnetic Wave(page 357) Transverse Wave (page 363) Longitudinal Wave or Compression Wave(page 363)

Chapter 11 A wave that occurs at the boundary between 2 different mediums, such as between water and air. Examples Ocean waves Surface seismic waves Surface Wave (page 364)

Journal – 11/19/09 Compare and Contrast a longitudinal and transverse wave. If you need to look it up, go to page 363 in your yellow Science Spectrum book. Be sure you write the difference in your own words.

Chapter 11 – Quiz over Vocabulary Wave doesn’t travel through a medium __________________________ __________________________ __________________________ Waves that cause particles to vibrate parallel to the motion of the wave. Any material that a wave travels through. 1. __________ 2. Transverse 3. __________ 4. __________

Chapter 11 – Quiz over Vocabulary A type of motion in which the wave fades. Sound, seismic, and water are examples of this kind of wave. __________________________ _________________________. The ability to do work. 5. __________ 6. __________ 7. Simple Harmonic Motion 8. __________

Quiz Answers #1 – Electromagnetic Wave #2 - A wave in which the particles travel perpendicular to the wave. #3 – Longitudinal #4 – Medium #5 – Damped Harmonic Motion #6 – Mechanical Wave #7 – A wave that continues forever. #8 – Energy #9 – trough #10 – crest

Chapter 11 – Quiz over Vocabulary #9 - Identify the dip of the wave. Ignore the labels and arrows. #10 - Identify the rise of the wave. Ignore the labels and arrows. For questions 9 and 10 use the picture to identify the parts of the wave. 9. __________ 10. __________

Focused 2-minute free write Write everything you can about waves. If you get stuck on an idea or can’t think of something, write the last sentence you wrote over and over until a new thought comes to you. Turn your paper in.

Journal – December 7, 2009 Draw and label 2 types of waves. Compare and contrast period and frequency. (refer to page 367)

Parts of Waves Parts of a Transverse wave. Trough Crest

Chapter 11 A change in position that resembles an up and down motion. The low portion of a wave The high portion of a wave oscillates Trough Crest

Parts of a Wave continued. Parts of a Longitudinal or Compression Wave

Chapter 11.2 Wavelength (pg 366) Period (pg 367 – figure 11-11) The distance from one crest of a wave to the next crest or trough to trough or compression to compression. The time required for one full wavelength of a wave to pass a certain point and the time required for one complete vibration of a particle in a medium.

Chapter 11.2 Frequency (pg 367) Frequency- Period Equation(pg 367) Wave Speed (pg 369) The number of full wavelengths that pass a point in a given time. The frequency is the inverse of a period. How fast a wave moves. Calculate it by dividing the wavelength by distance of one wavelength (period) or wavelength times its frequency

Practice calculating wave speed Page 370 – Math Skills Piano – mid C vibrates at a frequency of 264 Hz _ sound waves produced have a wavelength in the air of 1.30 m. What is the speed of sound in air? V(velocity) = frequency times wavelength 264 Hz x 1.30 m = 343 m/s (In the book they converted Hz to seconds.)

Chapter 11.2 What affects wave speed (pg ) Sound Waves - type of medium, the arrangement of particles in a medium (states of matter) Light Waves – doesn’t need a medium to travel through When it does travel through a medium like air or water it slows down.

Chapter 11.2 Doppler Effect(pg ) Pitch is determined by the frequency at which sound waves strike the eardrum in your ear. The doppler effect then is an observed change in the frequency of a wave when the sound source or the observer moves.

Journal – December 12/8/09 Explain Constructive and Destructive Interference. Page 376 – 377. Describe standing waves. Page 379

Chapter 11.3 – Wave Interactions The bouncing back of a wave when it meets a surface or boundary. The bending of waves around a barrier or an edge. Reflection (page 374) Diffraction (page 375)

Chapter 11.3 – Wave Interactions The bouncing back of a wave when it meets a surface or boundary. The bending of waves around a barrier or an edge. Refraction (page 376) Diffraction (page 375)

Chapter 11.3 – Wave Interactions The bouncing back of a wave when it meets a surface or boundary. Constructive Interference occurs when 2 waves line up and crests overlap making a larger wave. Reflection (page 374) Constructive Interference (pg 377) graphics/prism-dispersing-light.jpg dev.physicslab.org

Chapter 11.3 – Wave Interactions Any interference in which waves combine so that the new wave is smaller than the original waves.. Destructive Interference Reflection ( page 377)

Chapter 11.3 – Wave Interactions A wave formed by interference that appears not to move – speed amplitude and frequency are the same. Standing Wave (page )