← Earth sCience oceanography notes 3/21/11 Export Options Alphabetize Word-Def Delimiter Tab Comma Custom Def-Word Delimiter New Line Semicolon Custom Data Copy and paste the text below. It is read-only. Select All Ocean basics Covers 70% of all the earth's surface. The northern hemisphere has less ocean waters 61% than the south which is 81% ocean. Global Ocean The idea that the individual oceans make up one large ocean. Satellites 1. Gather widespread data quickly so the elevation of the ocean can be measured. 2. Water reflects the ocean floor features such as mountains. Dredge Dragged along the ocean floor collecting samples. Cores Get undisturbed sediment samples.