Unit-1: Introduction to Oceanography, Physical and Biological Ocean Properties and Ocean Management Oceanography is the scientific study of oceans and seas. Since oceans cover about 71% of the Earth's surface , they play an important role in controlling climate, weather, marine life and the global environment. Oceanography is an interdisciplinary subject because it combines knowledge from Geography, Geology, Physics, Chemistry, Biology and Environmental Science to understand the oceans and their processes. ★ The word Oceanography is derived from two Greek words: Okeanos meaning Ocean . Graphia meaning Description or Study . Therefore, Oceanography is the scientific study of oceans and seas, including their origin, relief, water properties, movements, marine life and their relationship with the Earth and atmosphere. Scope of Oceanography The scope of oceanography is very wide because it studies almost every aspect of the oceans. It includes the follow...