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What is the major component in the ocean? Sodium and Chlorine
Why is the ocean salty? It contains dissolved salts
What percentage of Earth’s surface is covered by ocean? 70%
What percentage of the ocean is salt? 3.5% salts
Name three things that affect surface currents. Global Winds, the Coriolis Effect and deflection off continents
What temperature are currents on the west coast of continents? cold
What temperature are currents on the east coast of continents? warm
Warm currents originate from _____________________. the tropics
Cold currents originate from ___________________________. polar areas
The Coriolis Effect turns the currents in what direction in the Northern hemisphere? clockwise
The Coriolis Effect turns the currents in what direction in the Southern hemisphere? counter clockwise
How does a density current form? A density current forms when more dense
What conditions are needed for density of seawater to increase? increased by an increase in salinity or by a decrease in temperature.
Do surface currents or density currents move more quickly? surface currents
What is upwelling? a circulation in the ocean that brings deep cold water to the ocean’s surface.
What does upwelling affect? Why? affects climates of nearby coastal areas. because it brings cooler water to the coasts
What features on the ocean floor are associated with continental crust? The continental margin which containscontinental shelf, slope and rise
What features on the ocean floor are associated with oceanic crust? The deep ocean basin is made of oceanic crust. It consists of the abyssal plain, mid-ocean ridges, rift valleys and ocean trenches.
Where are many of the oceanic crust features found? Why? form near boundaries at Earth’s tectonic plates.
Is the California current cold or warm? cold
Created by: pinkhearts98



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