OCS 1005 Lecture : Lecture 10
15 Mar 2019
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Document Summary
Oceanography, and covers more materials (attend class, spend more time in review, ask questions) Density is a key concept for understanding the structure of earth. Density measures the mass per unit volume of a substance. Something that is small but heavy has a high density; Something that is light for its size has low density. Things that have high density sink, while things with low density float. For example, water has a density of 1 g/cm3 (=1000 kg/m3) 1 cm3 of pure water weighs 1 gram at 3. 98 oc (maximum weight of pure water). At 20 c and 1 standard atmospheric pressure, dry air has a density of 1. 2041 kg/ m3. At 3. 98 c and 1 standard atmospheric pressure, pure water has a density of 1000 kg/m3. Every 10 m increase in water depth corresponds to an increase of 1 kg/ cm2 in pressure (equivalent of 1 atmospheric pressure). Pure water has a density maximum at 3. 98 c.
