*refer to chapter 3 in your textbook. learning goals: 1. i can identify & label the ocean zones...
TRANSCRIPT
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Lesson 2.2Ocean Floor
*Refer to Chapter 3 in your Textbook
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Learning Goals:1. I can identify & label the ocean zones2. I can label & identify ocean floor features3. I can describe the composition of the
seafloor
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Ocean Zones Hortizontal:
Intertidal Zone: area closest to shore, covered during high tide and exposed to air during low tide
Neritic Zone: extends from the intertidal zone to the continental shelf
Oceanic Zone: extends from the continental shelf to the end of the continental slope
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Ocean Zones Vertical:
Pelagic Zone: “open ocean” Photic: portion of the pelagic zone with sunlight Aphotic: portion of the pelagic zone without
sunlightBenthic Zone: “bottom of ocean,” ocean floor Hadal Zone: below the bottom of the ocean
floor (trenches)
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Ocean Floor Bathygraphic features: are the physical
features of the ocean VS Topographic features of land
Ocean Floor Divided into 2 regions:Continental Margin: from continental shelf to
riseOcean Basin: from continental rise to open
ocean
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Continental Margin:Continental Shelf: top of marginContinental Slope: sharp drop from shelf Continental Rise: bottom of slope, gradual drop Submarine Canyon: deep cut in continental
margin
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Ocean Basin:Abyssal Plains: flat ocean bottomSeamounts: single underwater pointed
mountain Guyots: single underwater flat mountain Trenches: deep cut in the ocean floor Ridges: a continuous series of underwater
mountains
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Ocean Basin
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Composition of the Ocean FloorBasalt rock covered by a layer of sedimentTypes of Sediment:
Hydrogenous: forms from chemical processes in the seawater
Biogenous: forms from the shells & skeletons of living organisms
Terrigenous: carried into the ocean from the land
Cosmogenous: particles from outer space
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