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Guided Notes about Ocean Movements

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Guided Notes about Ocean Movements Chapter 15, Section 3 1. A wave is a rhythmic movement that carries energy through space or matter. An ocean wave is generated by ... – PowerPoint PPT presentation

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Title: Guided Notes about Ocean Movements


1
Guided Notes about Ocean Movements
  • Chapter 15, Section 3

2
  • 1. A wave is a rhythmic movement that carries
    energy through space or matter. An ocean wave is
    generated by wind flowing over the waters
    surface.

3
  • 2. The highest point in a wave is the crest, and
    the lowest is the trough. The vertical distance
    from crest to trough is the wave height.

4
  • 3. Wavelength is the horizontal crest-to-crest
    distance. Wave speed increases with wavelength.

5
3 factors that determine wave height
  • Wind speed
  • Wind duration
  • Fetch, which is the expanse of water that the
    wind blows across

6
  • 5. Tides are a periodic rise and fall of sea
    level. The daily cycle of high and low tides
    takes 24 hours and 50 minutes.

7
  • 6. Surface currents affect the upper few hundred
    meters of the ocean. They follow predictable
    patterns because they are driven by Earths
    global wind systems.

8
  • 7. Earths continents deflect ocean currents to
    the north and south so that closed circular
    current systems, called gyres, develop. The
    gyres of the northern hemisphere circulate in a
    clockwise direction because of the Coriolis
    effect.

9
Define and state the importance of upwelling
  • Upwelling is the upward motion of ocean water
    from cold, lower depths to the surface.
  • Upwellings are important because they are rich in
    nutrients, which support abundant populations of
    marine life.
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