Earth science 16.2

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Earth science 16.2

  1. 1. 16.2 Waves and Tides <br />
  2. 2. Wave Height <br />The vertical distance between the trough and crest of a wave.<br />
  3. 3. Wavelength <br />The horizontal distance separating trough and crest of a wave.<br />
  4. 4. Wave Period <br />The time interval between the passage of successive crests at a stationary point. <br />
  5. 5. Fetch <br />The distance that the wind has traveled across open water.<br />
  6. 6. Tide <br />Daily change in the elevation of the ocean surface.<br />
  7. 7. Tidal Range<br />The difference in height between successive high and low tides.<br />
  8. 8. Spring Tide <br />Highest tidal range that occurs due to the alignment of Earth, the moon, and the sun.<br />
  9. 9. Neap Tide <br />Lowest tidal range, occurring near the times of the first-quarter and third-quarter phases of the moon.<br />
  10. 10. Key Concept<br />From where do ocean waves obtain their energy?<br />Most ocean waves obtain their energy and motion from the wind.<br />
  11. 11. Key Concept<br />What three factors affect the characteristics of a wave?<br />The height, length, and period that are eventually achieved by a wave depend on three factors: wind speed, length of time the wind has blown, and fetch.<br />
  12. 12. Key Concept<br />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 wave move around in a circle. <br />
  13. 13. Key Concept<br />What causes tides?<br />Ocean tides results from differences in the gravitational attraction exerted upon different parts of Earth’s surface by the moon and, to a lesser extent, by the sun.<br />

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