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Waves and Currents

QuestionAnswer
waves the up and down movements in the ocean caused by wind blowing across the ocean's surface
ocean currents “rivers” that flow in the ocean; caused by wind, temperature, and salinity
surface currents currents that move horizontally (parallel to the Earth's surface); powered by prevailing (constantly blowing) winds
Coriolis Effect curving of surface winds and surface currents due to the Earth’s rotation
density how tightly packed something is
salinity the measure of saltiness of the water
density currents currents that circulate deep in the ocean
The Gulf Stream a warm current that flows from the East Coast of North America to Europe
3 things the height of a wave depends on speed of the wind, distance over which the wind blows, length of time the wind blows
What causes waves? wind
direction currents move in the northern hemisphere right (clockwise)
direction currents move in the southern hemisphere left (counterclockwise)
How do currents affect climate? Cold currents bring a cooling effect to the air and land, and warm currents bring a warming effect to the air and land.
What two things affect the density of water? temperature and salinity
Density increases as temperature __________. decreases
As temperature increases, density, ____________. decreases
As salinity increases, density ____________. increases
As ocean depth increases, salinity _______________ and temperature ____________. salinity increases and temperature decreases
How do molecules move when energy passes through water? in small circles (Waves do NOT move things forward.)
How does warm water at the surface become colder? It radiates heat into the atmosphere.
Where do warm surface currents begin? near the equator
Where do cold surface currents begin? at the poles
What causes density (deep sea) currents? differences in density and salinity
____________ water rises, and ____________ water sinks. Warm, cold
What controls surface currents? prevailing global winds and the Coriolis effect
constantly moving system of deep-ocean circulation driven by temperature and salinity Great Ocean Conveyor Belt
How do surface currents move water? horizontally
Created by: Nisey1996
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