from winds :)
Suface currents form from the wind. The wind can make the surface cold or warm.
The moon
Volcanic.
A difference between gyres and currents is that currents are formed by the wind, but gyres are formed by currents.
Volcanic Mountains
Not sure what a suface cuurrent is. In deep water, there often are currents that flow in different directions at different depths. A surface current will flow in one direction, near the surface, while there will be a current flowing in the opposite direction deeper down.
It is an active volcano.
the ocean .
normal
winds
Silver sulfide is formed on the suface of silver objects.
Sponge bob has nothing to do with it.