Geology
What are the three types of plate boundaries?
Convergent, divergent, transform
What are the three regions of a thermocline?
Mixed surface water, thermocline, deep ocean water
71%
Which direction do surface currents move in the Southern Hemisphere?
Counterclockwise
Name the ocean basins
Atlantic, Pacific, Indian, Arctic
Regardless of the type of plates, what always forms at a convergent boundary?
Trench (subduction zone)
Why are halocline graphs insignificant compared to thermocline graphs?
Salinity does not vary greatly between surface and deep water globally whereas temperature does - both, however, impact the density of water
Areas of mantle upwelling mid plate
Hot spots
What is the name of the global ocean deep water current?
Thermohaline circulation
Where did Ms. Silance go to college?
What forms at divergent oceanic boundaries?
Mid ocean ridges (sea floor spreading centers)
How do temperatures of mixed surface waters vary in middle (temperate) latitudes?
Vary depending on the season
Sodium and chlorine (NaCl)
What causes surface currents?
Wind, solar radiation, and Coriolis effect
Why is the Pacific plate boundary called the Ring of Fire? Explain the phenomena.
Many convergent boundaries - ocean/continental form volcanoes
Describe an active vs. passive margin.
Active - plate boundary, short shelf
Passive - no boundary, long shelf
Describe how salinity differs from the equator to the poles and why.
Temperate latitudes - high (high evap, little precipitation)
Equator - mid (high evap, high precipitation)
What are sources of salt in the ocean?
dissolved out of rocks, hydrothermal vents, dust from land, volcanic ash = from the crust!
Which climate phenomena pushes warm surface water in the Pacific to the west, causing cold water upwelling, and therefore increased rain/flooding in the southern US?
El Nino
What kind of dog does Ms. Silance have?
A husky :)
Explain why oceanic crust is younger than continental crust.
Constant movement - subduction and divergence
Describe why the poles have no thermocline.
Lack of temperature variation due to little sunlight and ice coverage
Why are coastal regions cooler than inland regions?
Ocean absorb heat from atmosphere bringing temperatures down, inland regions do not have large bodies of water to do this
Why isn't there a gyre in the Arctic ocean?
Small radius, lack of sunlight = lack of heat transfer in the air = no strong wind pattern
Explain how a pycnocline influences the migration of whales from the equator to the poles during the summer.
Strong pycnoclines can prevent whales from accessing food in mixed surface water. Poles do not have a strong thermocline and therefore have weaker pycnocline so they can reach surface plankton.