ERTH 20 Lecture Notes - Lecture 8: Surface Tension, Covalent Bond, Extinction Event
7 May 2020
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Document Summary
Ocean sediment have allowed us to reconstruct amazing amounts of information about the past. Most of what we know about our geology, climate, and biology comes from ocean sediments. Information includes: ocean temperature, salinity, abundance and type of marine life, wind patterns, surface and deep ocean currents, volcanic eruptions, mass extinction events, changes in earth" climate, movement of tectonic plates. Vast amounts of it on earth and makes up our oceans. Makes up much of life on earth. Only substance occurring naturally in 3 states on earth. Highest surface tension of all common liquids: cohesive. Dissolves more substances than any other solvent. Thermal properties are hugely important for our weather and climate systems. Each shared pair is called a covalent bond: much energy needed to break them. Bend of molecule means that there is a more positive side of the molecule = dipolar. Dipolar molecule results in weak electrostatic forces between molecules = hydrogen bonds.
