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Oceans

26 cards·by PurplePanda
Study this deck
What are the three subdivisions of the continental margin?
1. shelf 2. slope 3. rise
How fast does sound travel in water?
about 1500 m
Ocean trenches are formed by the process called...
subduction
When one oceanic plate is forced underneath another plate a ...... forms
trench
What forms features on the ocean floor?
Plate Tectonics
mountain chains formed by magma coming through rift zones are called what?
mid-ocean ridge
List three resources available from the ocean.
1. Fishing 2. Farming 3. Fresh Water
Fish populations are reduced by......?
overfishing
What is desalination?
Desalation is the process of removing salt from ocean water
What is sludge?
the solid part of waste matter
What are two effects of oil spills?
1. animals/plants die 2. fishermen lose jobs
Point-source pollution comes from...
a specific source
Streamlike movements of water are called what?
ocean currents
Name three factors that influence currents.
1. winds 2. Earth's rotation 3. position of continents
horizontal movements of water that are caused by wind and occur at or near the ocean's surface are called...
surface currents
Name three factors that control surface currents.
1. global winds 2. the Coriolis Effect 3. continental deflections
Which way do the winds blow near the equator?
east to west
What is the deflection of moving objects from a straight path due to Earth's rotation called?
Coriolis Effect
What is the deepest and densest layer of water in the ocean?
Antarctic Bottom
Name three materials transported by global ocean circulation.
1. oxygen 2. nutrients 3. heat
What happens to water when a wave of energy moves through it?
the waves move too
What two forces influence tides?
1. sun 2. moon
What does dividing wavelength by wave period give you?
wave speed
The difference between levels of ocean water at high tide and low tide is called a....
tidal range
Tide that occur when the sun, Earth, and the moon form a 90 degrees angle are called...
heap tides
Tides that occur when the sun, Earth and moon are aligned are called......
spring tides