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Oceans Water, Waves & Underwater Ocean features
Oceans
Water, Waves & Underwater Ocean
features
What does the bottom of the ocean look like?
Covered in sand?
Covered in
Plants?
Covered with Mountains?
Features of The Ocean Floor
• The landscapes found deep beneath the ocean are as dramatic as any found onshore!
Jagged Peaks
muddy plainsMountains
Trenches
Basin• Low• Flat• Abyssal Plain
– are made of fine sediments that have been washed off the surface of the continents for thousands of years.
Continental rise•Moving upwards towards shore
•Made of a mixture of sediments
•Turbidity!!! --- Small underwater avalanches of sand and sediment •Less habitats
Continental Slope
• Steepest!!!!• Minimal Habitats
Continental Shelf•Shallowest•What we see/walk on when we go to the beach•Lots of Habitats and Creatures•Warmer water ( sunlight)•Like a shelf !!........ before it drops off into deep ocean
Trench• Underwater canyon • Deepest places on
Earth• Coldest
Seamounts•Underwater Mountains and Volcanoes •Those that surface above water are known as volcanic islands• Hawaii
What about Landforms above water created by the ocean?
Barrier Islands• Barrier islands are constantly on the move.• Migrating under the influence of changing – sea levels– storms– waves– tides – longshore currents.
**They form when sediments piles up on itself and eventually reaches the surface.
Barrier Islands
• They move in a rolling fashion along the coastline.
Sediment deposits on the back side
Barrier island grows & elongates
Now that we know what is under the water, lets look at the water
characteristics & see how that water moves…..
Ocean Water Characteristics
Waves• A Wave is a rhythmic movement that carries
energy through matter or space.
• In oceans, waves move through seawater
Crest – highest point of a wave
Trough – lowest point of a wave
Wave Height – vertical distance between the crest and the trough
Wavelength – horizontal distance between two crests or two troughs
Wave Motion• When a wave passes through the ocean,
individual water molecules move up and down but they do not move forward or backward.
http://www.youtube.com/watch?v=bQrj0DNXjMYhttp://www.youtube.com/watch?v=7yPTa8qi5X8&feature=related
Hey Guys, watch these videos!
So if a WAVE is the movement of energy…..Where does the energy come from?
Wind• Wind blows across the water’s surface
creating shear force
Fetch- the distance the wind can blow over the water
* The longer the fetch length and the faster the wind speed, the larger and stronger the wave will be.
