From a school bench all perfectly remember that our planet more consists of water. The rivers, the seas, oceans, make the hydrosphere of Earth. It is worth studying the World Ocean from drawing up a geographical location of its objects. It is possible to try, for example, from the sea. The sea – water with certain properties, is a part of the ocean, is isolated from it by the land.
Current is called the horizontal movement of water in oceans and the seas. Currents transfer the huge mass of water to long distances. They are divided into warm and cold. If temperature of a current is lower than temperature of surrounding waters, it is defined as cold. Cold make the third part of all known currents.
