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35 Cards in this Set
- Front
- Back
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what are the 3 major ocean provinces |
Continental margin Ocean basin floor Mid ocean ridge |
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What is the difference between an active and passive continental margin |
Active: close to plate boundaries, convergen or transform. tectonic activity
Passive: not close to plate boundaries no major tectonic activity |
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What are the 4 main features of a continental margin |
Continental shelf Shelf break Continental slope Continental rise |
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What the continental shelf look like if we have a passive continental margin vs an active margin |
wider shelf vs narrow one east coast vs west coast |
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What is the continental slope |
where deep ocean basins begins like the side of a mountain |
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What is the current called that falls down the slope |
Turbidity current |
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What is the current called that falls down the slope |
Turbidity current |
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What is these currents create bt cutting into the slope? |
submarine canyons |
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What is the continental rise |
looks like hills with the rocks falling down from the slope |
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what is the abisal plain/ ocean floor? |
deppest and flattened parts of the earth, suspention setting of very fine particles sediments |
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What is the mid-ocean ridge |
mountain chains, volcanoes and basaltic lava . 2.5 km above the sea floor |
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What is seismic reflection profile |
With explosions or air guns the receiver details the ocean structure beneath the sea floor |
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what is batimetry |
measures the deep of the ocean |
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what is a fathom |
unit measure 1.8 m / 6 feet |
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what is a hotspot |
At intra plate is a hot magma column thar breaks through the crust snd creates islands and vulcanoes and sea mounts |
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Diferences seamount vs tablemount |
rounded top vs flattened top due to waves erosion |
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what is oceanography |
the study of the marine enviroment |
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Fields of oceanography |
Geological structure eartquakes Chemical conposition acidit Physical currents waves Biological organism |
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What is the difference betweek ocean and sea |
sea are smaller and shallower than oceans and usually enclosed by land |
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what are the 5 oceans |
Pacific (larger) Atlantic Indian Artic Southern |
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what is the deepest part of the ocean |
At pacific, Mariana trench 36.161 feet deep |
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who is the founder of oceanography and why is called that |
Cap James Cook, first to mapped the iceand and measured deep |
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What is the nebular hypothesis |
that the solar system bodies were formed from nevular gases and space dust |
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what are the layers os the earth by chemical composition |
crust mantle core |
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what are the layers of the earth by physical properties |
litosphere astenosphere mesosphere outer core inner core |
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what are the differences of the litosphere vs astenosphere |
cool rigid vs hot plastic |
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what are the differences of the litosphere vs astenosphere |
cool rigid vs hot plastic |
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what are the differences of continental and oceanic crust |
granite less dense vs basaltic more dense 35 km vs 8 km |
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What is plate tectonics |
describe the features and processes on eart. Land configuration has changed in the past and keep changing in the future |
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what is the evidence of plate tectonics? |
fossil records matching secuence of rocks and mountain chains glaciar ages modern organism similar ancesters |
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Where most earthquakes occurs? |
plate boundaries where 2 plates meet |
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What are the 3 type of plate boundaries? |
Divergent < > Convergents > < transform. lateral movement |
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What plates doing at divergent boundary? example? |
the plates move far away each other Mid atlantic ridge |
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what happend convergent plate boundary? Example |
the plates travels and colide each other Peru chile trench the andes |
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What is a transform boundary and what we get here? |
where plates move in different derections on on top of the other lateral San Andreas fault |
