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Tsu

Tsu. Nami. Tsunami. Daniel Sheridan & Chris Reeves. Earth Science & Physics. Learning Standards. Earth Science: Major Understandings: Physics: Major Understandings: 4.3b, 4.3c, 4.3e Waves transfer energy There are two types of waves

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Tsu

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  1. Tsu Nami

  2. Tsunami Daniel Sheridan & Chris Reeves Earth Science & Physics

  3. Learning Standards • Earth Science: • Major Understandings: • Physics: • Major Understandings: 4.3b, 4.3c, 4.3e • Waves transfer energy • There are two types of waves • Waves contain an amplitude, wavelength, period, and frequency

  4. Tsunami • Tsunami- in Japanese means “harbor wave” What is a commonly misused name for Tsunami? TIDAL WAVE

  5. What is a Tsunami? • Tsunami- is a series of very long wavelength ocean waves generated by the sudden displacement of large volumes of water. CLICK HERE

  6. What causes a Tsunami • Undersea earthquakes • Landslides • Volcanic eruptions • Extra-terrestrial impacts

  7. Characteristics of Waves • Waves are a pattern of rising and falling water level, transmitted along the surface • Ocean waves are a transport of energy, not water

  8. Difference between wind waves and a Tsunami • Wind waves travel only on the surface of the water • Tsunami waves cause the entire column of water, from the surface to ocean floor, to rise and fall

  9. Types of Waves • There are two types of waves • Longitudinal • Transverse

  10. Anatomy of a Wave

  11. Lets Check Your Understanding! • 1. The wavelength of the wave in the diagram above is given by letter ______. • 2. The amplitude of the wave in the diagram above is given by letter _____.

  12. One more! Indicate the interval that represents one full wavelength. a. A to C b. B to D c. A to G d. C to G

  13. Wave Frequency • Frequency measures how many cycles a waves completes in one second (Hertz)

  14. Period – FrequencyRelationship • A wave’s period refers to the amount of time it takes for two successive wave crests to pass a given point. • A wave’s period and frequency are Inversely proportional.

  15. Check for Understanding, Part 2! • A wave has an amplitude of 3.8 cm, a frequency of 51.2Hz and a wavelength of 24.8 cm. Determine its/ period. • A fly flaps its wings back and forth 121 times each second. What is the period of its wings? • As the frequency of a wave increases, the period of the wave______________.

  16. Velocity of a Wave • Velocity = Wavelength / Period • Velocity = Wavelength * Frequency Ex.) Find the velocity of a 20 Hz wave that has a 5 meter wavelength. • F= 20 Hz, Wavelength= 5m, Velocity=? • Velocity= (20 Hz)*(5 m) = 100 m/s

  17. The Physics behind a Tsunami • Due to large wavelengths (+500km), tsunamis are considered shallow water waves. • The velocity of a shallow water wave differs from the velocity of a regular wave. • If we use a depth of 4000m, what would the velocity of the wave be?

  18. What happens when a Tsunami nears land? • As water depth decreases, the Tsunami’s velocity decreases • Shallower water would increase the height of the Tsunami

  19. What happens when a Tsunami reaches land? • Flooding • Mass destruction and erosion • Large death-tolls

  20. Warning Signs • Earthquakes- not all earthquakes will cause a tsunami, but better safe than sorry • Sea retreat- a tsunami will cause a rapid retreat and exposed large amounts of the ocean floor • Sound- a approaching tsunami will sound like a train or even a jet

  21. http://blog.shockwave.com/wp-content/uploads/2010/04/earth1.gifhttp://blog.shockwave.com/wp-content/uploads/2010/04/earth1.gif • http://www.blackcoraldivers.org/Content/images/Underwater_Background_by_Linzee777.jpg • http://www.superchefblog.com/images/tsunami_japanese.png • http://archivos.metatube.com/uploads/gallery/pics/gallery_pic_1612_19391.jpg

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