Ocean Floor
Area on the bottom of the sea floor
What is the chemical formula for the salt in the ocean?
NaCl
Name 2 causes of a surface current
Global winds and coriolis effect
What causes tides?
the moon and Sun's gravity pulling on the earth's oceans
Name the 5 oceans from large to small
Pacific, Atlantic, Indian, Southern, Arctic
Where is the continental slope?
Name 5 common elements found in ocean water.
Oxygen, nitrogen, carbon dioxide, sodium, chlorine, magnesium, sulfur, calcium
How many global gyres are there?
5
Explain a spring tide and what effect does it have on the earth's oceans?
Sun, earth, moon form a straight line. Sun and moon's gravity work with each other causing an unusually high tide
E to W
What are the deepest parts of the ocean called?
What percentage of water on the earth is locked up in the ocean?
97%
Why do gyres spin in different directions depending on the hemisphere?
Coriolis Effect
Explain a neap tide and what effect does it have on the earth's oceans?
Sun, earth, moon form a right angle. Sun and moon's gravity "fight" with each other producing a lower than normal low tide globally.
What is the deepest point on earth and how deep is it?
Mariana Trench (Challenger Deep), 35-38K
How did seamounts from?
magma pushing through the oceanic crust
30
Which gyre is the GPGP located in?
North Pacific
Why do we get 2 high tides a day?
Because the earth is rotating
What percentage of the earth is covered in ocean?
71%
What do we call the flat topped seamounts?
guyot
What is the average ocean salinity?
35 ppt
Name the 3 types of currents and give an example of each?
Surface, mid level, deep. Surface caused by winds, mid level (upwelling, downwelling) caused by tides, deep (density, thermohaline, turbidity) caused by gravity and density differences.
What is the average global tidal change?
3 ft
Name the type of tide that consists of only 1 high and 1 low tide a day, and where does it happen?
Diurnal tide. Gulf of Mexico, Alaska