Our series of articles “Physical processes in Nature” had originated in 2014. Our goal was to give an integrated approach to science education leading to concrete help for teachers. We had collected a series of phenomena, processes etc., which we could come alive in physics, chemistry, biology, geography merged in an unified approach on fundamental level. In the first article of our series we have deal with the problem of soil, the second article was related to problem of water including his physical and chemical characteristics. Our third article is devoted to problem of oceans and seas, collecting their physical properties, their changes and reasons of changes attributed.