The Movement of Ocean Water

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Presentation transcript:

The Movement of Ocean Water Chapter 14 The Movement of Ocean Water Chap 14, Sect 3 (Waves) Objectives: Identify the parts of a wave. Describe how ocean waves form and move.

Things that make you go hmmm….. Is a wave different from a surface current? Is a wave different from the tide?

What is a Wave? A wave is the movement of energy through a body of water.

Parts of a wave Crest – The highest point of the wave Trough – The lowest point of the wave Wavelength – The distance between two neighboring crests or two neighboring troughs Wave height – (amplitude) the vertical distance between the crest and the trough

Wave wave movement animation Website for image and wave explanation (double click links to open in your browser)

How do waves change the shoreline? As a deep-water wave begins to interact with the ocean floor (becomes a shallow-water wave) it also slows down and increases in height. A breaker occurs when gravity pulls the wave (crest) down and it crashes into the ocean floor.

How do waves change the shore line? Longshore currents tear down and build up the coastline because they hit the shore at an angle. These currents tear down and build up the coastline. Longshore current animation (double click links to open in your browser)

Tsunami These are waves that are caused by underwater earthquakes, volcanic eruptions, landslides, and underwater explosions. Tsunami Animation (double click links to open in your browser)

Storm surge Storm surges are caused by strong storms (hurricanes) and involve a rise in sea level in a concentrated area.