15 terms

Ch 15 Oceanography

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Oceanography
The study of Earth's oceans, physical properties and organisms that live in them
Sea Level
The average level of the ocean's surface measured along a shoreline.
Sea
Salt water like oceans, but smaller and more land-locked.
Salinity
Measure of the amount of salt dissolved in water
Watershed
The entire area of land that drains into a specific river, lake or ocean
Run-Off
Rainfall or snowmelt that cannot be absorbed by soil and flows over the land into a body of water
Temperature Profile
A graph of how water temperature changes with depth in the ocean.

Extra: Includes the temperature and the latitudes where the following 3 layers are found: Surface Layer, Thermocline, Bottom Layer.
Thermocline
A transition layer that has rapidly decreasing temperature with depth.
Wave
Rhythmic movement that carries energy through water, space or matter.

Extra: In oceans waves are created by wind moving over the surface of the water.
Fetch
The distance that the wind blows over water.

Extra: The bigger the fetch, the bigger the waves become.
Breaker
Collapsing ocean wave that forms when a wave reaches shallow water and is slowed by friction with the ocean bottom.
Density Current
Current formed when dense seawater sinks beneath less dense seawater.

Extra: It is too deep to be caused by wind. Instead the current is caused by differences in temperature and salinity which leads to differences in density.
Surface Current
Ocean current caused by wind that occurs at or near the ocean's surface.
Gyre
Closed circular currents caused by the deflection (bouncing) of ocean currents when they hit continents.
Upwelling
Movement of deep, cold, and nutrient-rich water to the surface.

Extra: It is caused by winds pushing the surfacewater away so cold water can rise.