DIFFERENT AREA OF SEA BED Flashcards
what are the areas of sea bed
continent continental shelf continental slope abyssal plain ocean ridge ocean trench volcanic island
what is continental shelf
water area up to 200m which surround the continent important for human more productivity more light to produce photosynthesis more fish found here
what is continental slope
water area between 200 and 100m covered with sludge formed from dead bodies few organisms are found less light
what is submarine ridge
when 2 plates moves in opposite direction molten magma pushes out from mantle form submarine ridge
oceanic trench
when 2 plates come together
one is pushed under the other to form oceanic trench
volcanic island
plates come together and rubbed with each other they become weak to form volcanic island
how the continental shelf is affected
land erosion
sinkikng of continent
changing the sea level rise
why continental shelf important to human population
80% of world fish catch is from there
the supply of oil and gas
describe continental slope
the steeeper the slope from the continental shelf to abyssal plain
describe abyssal plain
flat ocean floor usually at depth 3000 to 6000m
flatened and covered with sludge
formed from dead orgnism
describe ocean ridge
area 2 continent plates moves away from each other
the molten materials from below pushes up and form an under water ridge between 2 plates
how ocean trench are formed
when 2 palates come together one pushes under the other and ocean trench are formed
