click below
click below
Normal Size Small Size show me how
idklol
Landformsg6
Question | Answer |
---|---|
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 |