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Waves

Waves. Includes: Water Sound Light Heat Earthquakes. Waves. 2. Wave = disturbance that transfers energy from place to place. 3. Waves & Energy. What carries waves? How do waves transfer energy? What causes waves?. MEDIUM. 3.1 What carries waves?. AIR.

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Waves

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  1. Waves • Includes: • Water • Sound • Light • Heat • Earthquakes

  2. Waves 2. Wave = disturbance that transfers energy from place to place

  3. 3. Waves & Energy • What carries waves? • How do waves transfer energy? • What causes waves?

  4. MEDIUM 3.1 What carries waves? AIR • What do sound waves travel through? • What do water waves travel through? WATER • 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

  5. 3.2 How do waves transfer energy? Particles in motion Ex: Stadium

  6. 3.3 What causes waves? • Disturbances from energy (wave in water, sound, movement)

  7. Question #1 FALSE – particles only temporarily move TRUE or FALSE? In order for Shane to hear Sally, air molecules must move from the lips of Sally to the ears of John

  8. 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?

  9. Answer • Ocean waves don’t transfer water, they transfer ENERGY • The particles just oscillate back and forth

  10. 4. Types of waves • Waves move through mediums in different ways OR

  11. 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:

  12. (4.1 Transverse Waves Continued) • Examples: heat waves, light waves, seismic (earthquake waves)

  13. 4.2 Longitudinal Waves • Longitudinal waves = move the medium parallel to the direction of the wave • Ex:

  14. (4.2 Longitudinal Waves Continued) • Examples: sound, seismic waves (earthquake)

  15. Particle motion • Wave animation

  16. Question #3: Which type of wave is each? Transverse or Longitudinal?

  17. Properties of Waves

  18. Transverse Wave wavelength Direction of wave  amplitude Resting point

  19. Key words for Transverse • Resting point • Amplitude • wavelength

  20. Longitudinal Waves

  21. Key words for Longitudinal • wavelength

  22. Electromagnetic vs. Mechanical • Electromagnetic waves do not need a medium to transfer the energy • Ex: Light, heat waves • Mechanical waves need particles (mediums) to transfer the energy • Ex: Sound, Earthquake waves

  23. 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:93http://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 • http://www.astarmathsandphysics.com/o_level_physics_notes/o_level_physics_notes_longitudinal_and_transverse_waves_html_m3d0975ac.gif • http://science-class.net/Notes/Images_8th_Notes/Longitudinal-Wave.gif

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