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Oceanography Marine Resources: Physical, Energetic(marine), Biological, Nonextractive. Physical=petrol, methane, sand/gravel. Energetic(marine)= wind, waves, current, tide. Biological=plants/animals. Non-extractive=transport of people/cargo/waste disposal.Renewable/Non-renewable=Naturally replaced/not naturally replaced-gas, oilAncient Greeks-earth was sphereTwo Elements in Core: Iron and NikleActive Continental Margin: converging plates, High EQ or volcanic activity, pacific type marginsPassive Continental Margin: Diverging plates, Little EQ or volcanic activity, atlantic type margins.[pic.