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11/5 Warm Up 1.Grab a clipboard from front 2. SWOD: wave pg O – 7 3. Pull out notebook and label it “Waves”
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What do you think of for “Waves” How many of you have been to the beach? How many have been on a boat? What stories do you all have about waves?
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Waves 1.Includes: 1.Water 2.Sound 3.Light 4.Heat 5.Earthquakes
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Waves 2. Wave = disturbance that transfers energy from place to place
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3. Waves & Energy 1.What carries waves? 2.How do waves transfer energy? 3.What causes waves?
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3.1 What carries waves? What do sound waves travel through? What do water waves travel through? AIR WATER MEDIUM 1.Medium = substance or material that carries the wave (what the wave travels through) 2.Mechanical wave = requires a medium to transfer energy 3.Electromagnetic wave = doesn’t require a medium to travel through
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3.2 How do waves transfer energy? Particles in motion Ex: Stadium
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3.3 What causes waves? 1.Disturbances from energy (wave in water, sound, movement)wave in water
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Question #1 TRUE or FALSE? In order for Shane to hear Sally, air molecules must move from the lips of Sally to the ears of John FALSE – particles only temporarily move
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Question #2 Every minute, ocean waves continue to splash onto the shore. In tables, explain why the beach is not completely submerged with water and why the middle of the ocean has not yet been depleted of its water supply?
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Answer Ocean waves don’t transfer water, they transfer ENERGY The particles just oscillate back and forth
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4. Types of waves Waves move through mediums in different ways OR
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4.1 Transverse Waves Transverse waves = move the medium at right angles to the direction of the wave OR = move medium perpendicular to the direction of the wave EX:
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(4.1 Transverse Waves Continued) Examples: heat waves, light waves, seismic (earthquake waves)
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4.2 Longitudinal Waves Longitudinal waves = move the medium parallel to the direction of the wave Ex:
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(4.2 Longitudinal Waves Continued) Examples: sound, seismic waves (earthquake)
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Particle motion Wave animation
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Question #3: Which type of wave is each? Transverse or Longitudinal?
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http://www.google.com/imgres?hl=en&sa=X&tbo=d&biw=1278&bih=593&tbm=isch&tbnid=B87U9RZ_AfXFsM:&imgrefurl=http://missionscience.nasa.gov/ems/02_ anatomy.html&docid=ERyyLXsEaXywSM&imgurl=http://missionscience.nasa.gov/images/ems/emsAnatomy_mainContent_wave- movement.png&w=600&h=158&ei=8mmVUK- FBeizigKSj4GgAg&zoom=1&iact=hc&vpx=76&vpy=288&dur=472&hovh=82&hovw=312&tx=234&ty=46&sig=110393057380908509629&page=1&tbnh=65&tbnw=248 &start=0&ndsp=17&ved=1t:429,r:6,s:0,i:93 http://www.kirksville.k12.mo.us/khs/teacher_web/alternative/transverse_wave.jpg http://hyperphysics.phy-astr.gsu.edu/hbase/sound/imgsou/lwav2.gif http://static.ddmcdn.com/gif/noise-canceling-headphone-8.jpg http://scienceprep.org/images/waves.jpg
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