Oceans Flashcards
The largest and deepest ocean
Pacific
Third largest ocean
Indian
The smallest shallowest ocean
Arctic
Two main gases in seawater are
Nitrogen and oxygen
Where does most of the oxygen in the ocean come from?
The atmosphere
What 4 factors change salinity
Movement
Tempt
Depth
Precipitation
Name the 5 zones in the ocean
Sunlit Twilight Dark Abyss Deep Sea anemone
Explain the abyss feature
No sunlight
Flattest place on earth
Deepest area on earth
Trenches
What does the water tempt do as it gets deeper
Gets colder
Major floor is divided into 2 areas
Continental margin
Deep ocean basin
Define the thermocline layers
Layer that changes tempt
2 factors that affect density
Salinity and tempt
Amount of energy a wave carries is called
Amplitude
How is amplitude measured on a wave
From resting point to crest
What is the layer that’s separates the warm water from the colder water
Thermacline
Undertow vs rip currents
Undertow is not as strong as rip tide
How do waves usually form
When the wind blows across the waters surface
What are the two tidal ranges
Spring and neap
What is the highest tidal range
Spring tide
What is the lowest tidal range
Neap tide
What are large streams of moving water that flow through the ocean called
Ocean currents
What are two types of ocean currents
Surface and deep currents
What winds push currents to the WEST across the ocean
Trade winds
What currents winds push currents to the EAST across the oceans
Westerly winds
What are surface currents
Wind driven currents near the top of the ocean
3 things affects surface currents
Global wind belts
Location of the continents
The earths rotation
Define the coriolis effect
The curving of the path of ocean currents due to earths rotation
Gyres
Lopped systems of surface currents
What direction do gyres in the northern hemisphere circle?
Clockwise
What direction do gyres in the Southern Hemisphere circle
Counterclockwise
What is so great about upwelling
They provide nutrition for da fishies
How do surface climates affect the climate
They warm or cool the air and change temperature
Four parts of the continental margin
Continental shelf
Continental rise
Continental slope
Submarines canyons
5 pats of the deep ocean basin
The abyssal plains Seamounts Guyots Mid ocean ridge Trenches
What is a seamount
Underwater volcano
Guyots
A seamount that has risen above the surface of the ocean to form an island but has sun h back into the ocean where they are eroded in the flat topped
Flattest part of the ocean
They abyssal plain
what part of the ocean are we standing on
Continental shelf
Where are submarines canyon often found
At the mouth of rivers
What are turbidity currents
Strong dense currents that carry away large amounts of sediments
What is the deepest places on earths crust
Ocean trenches
Name the deepest trench on earth
Mariana trench
