the ocean-bottom
The crust not under the ocean is called continental crust. It is thicker and less dense compared to oceanic crust and forms the landmasses on Earth's surface.
The rising of the deep cold currents to the ocean surface is called
gas
Dolphins live beneath the sea in the water. There is nothing called 'weather' under the ocean's surface.
temperature
The water that forms far below the surface is called a Deep Current.
This section of the ocean from floor to surface is called the water column.
Stream like movements of water that occur near the surface of the ocean are called surface currents. Stream like movements of ocean water far below the surface are known as a deep current.
Sure. The mountains are often tall enough to poke through the surface of the ocean where they are called islands. There are deep valleys under the ocean, too. Some are deep enough that you could put Mount Everest in the ocean into these valleys, and it would be completely covered in water.
surface current
Oceanic plate
A map of the ocean is called a topographic map. On a map the oceans surface has highs and lows look similar to the hills and valleys of the Earth's surface.