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wind
Cold ocean currents sink under warm ocean currents to form deep ocean currents.
Ocean currents
currents provide movement in times of little to no wind
They cause movement of the ocean.
The driving force behind surface currents is the wind. The wind happens naturally due to the constant rotating of the Earth.
They are pulled from the gravity/force of the moon therefore creating waves and currents.
Surface Currents.
Winds and subsea movement of water.
Earth's tilt
Movement of the ocean, or tides are directly related to deep ocean currents. Deep ocean currents are also responsible for the wind that causes the waves to crash into the shore.
The movement of water when ocean and fresh water meet is called Density currents.