Seas and oceans

Seas and oceans on the surface of the Earth almost twice as much as sushi. Their role in the life of the planet is extremely large. It was in seawater that life originated, the evolution of living beings began there, which then went to the land and mastered its expanses. Humanity from antiquity is firmly connected with the ocean: it serves as a source of food, minerals, seaways associate countries and continents. Finally, the climate of the earth directly depends on the oceans and seas. In this encyclopedia, the reader will get acquainted with all the diversity of the oceans and seas, with the properties of sea water, winds and flows, the structure of the seabed and islands, their rich animal world and other interesting facts.
For mid-school age