ocean floor
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why is the ocean salty?
rocks are int the water and rocks have salt in them
where does sand come from?
sand comes from broken down rocks
what causes tides ?
the moons gravitational pull
what causes waves?
wind blowing on the water
what is a trench?
an underwater canyon
what are the causes of a hot-water heat vent?
it is caused by water seeping into vent and touching a very hot stone
part of a contenet that slopes gently away from the shore line.
cont. shelf
amount of dissolved salts in the ocean
salinity
when cold,dense ocean water sinks
down-welling
part of content between cont. shelf and ocean floor
cont. slope
when cold water flows at the bottom hits land and flows up to the top.
up-welling
a continuous mountain range with a central valley on the ocean floor where two tectonic plates move away from each other
mid-ocean ridge
major circulating ocean current
gyre
a seamount with a flat top
guyot
a stream of water flowing in the ocean
ocean current
flat ocean floor covered in sediment
abyssal plain
volcanic underwater mountain
seamount
a long valley made from the earth’s crust sinking between to parallel faults
rift valley
how much of the earth’s surface is water?
70%
the order of amount of water largest to smallest.
oceans,glaciers\ice sheets, groundwater,fresh water, water vapor
a glacier is
a river of ice\ ice cap
what substance do fish need to live and take from the water?
oxygen
what is the order of size of oceans largest to smallest?
Pacific,Atlantic,Southern,Arctic and Indian.
what is most like a mountain ridge?
mid-ocean ridge