Waves And Tides 16 2 Ppt Vocab

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Waves And Tides 16 2 Ppt Vocab

  1. 1. Waves and Tides<br />16.2<br />
  2. 2. Wave Height<br />The very top of the wave is the crest and the water that separates the waves is called the troughs.<br />The vertical distance between trough and crest is called the wave height.<br />
  3. 3. Wavelength<br />The horizontal distance between two successive crests or two successive troughs is called wavelength.<br />
  4. 4. Wave Period<br />The time that it takes one full wave—one wavelength—to pass a fixed position is the wave period.<br />
  5. 5. Fetch<br />Fetch is the distance that the wind has traveled across open water. <br />The energy of the wind is transferred to the water and it increases both the height and steepness of the waves.<br />
  6. 6. Tides<br />Tides are regular changes in the elevation of the ocean surface.<br />They are the rhythmic rise and fall along the coastline.<br />
  7. 7. Tidal Range<br />The tidal range is the difference in height between successive high and low tides. <br />When the gravity of the sun and the moon are combined that produces a large tidal range.<br />
  8. 8. Spring tides<br />Spring tides are the tides that have the greatest tidal range due to the alignment of the Earth—moon—sun system.<br />
  9. 9. Neap Tides<br />The sun and the moon partially offset the influence of the other and as a result, the daily tidal range is less. <br />Each month there are two neap tides and two spring tides, each about one week apart.<br />
  10. 10. Where do Ocean waves obtain their energy?<br />Most ocean waves obtain their energy from the wind. <br />The greater the wind speeds the larger the waves.<br />
  11. 11. Three factors that affect the characteristics of a wave<br />The height, length and period that are eventually achieved by a wave depend on three factors…<br />1-wind speed<br />2-length of time the wind has blown<br />3-fetch<br />
  12. 12. How does energy move through a wave?<br />Circular orbital motion allows energy to move forward through the water while the individual water particles that transmit the water to move around in a circle.<br />This movement results in a circle that returns an object to the same place in the water.<br />
  13. 13. What causes tides?<br />Ocean tides result from differences in the gravitational influence upon different parts of earths surface by the sun, but much more by the moon.<br />

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