Astronomy 2021A/B Lecture Notes - Fossil, Geochemistry, Half-Life
22 Apr 2013
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Midterm 25% - starts at 7 pm. Ta monday 1-2, tuesday 2-3 pab 49. Earth: the la-z boy of the terrestrial worlds. Mars next best chance for life. A study of earth but we mean study of processes and features that shape our world: three meanings to focus on: Contain info about when they were formed. Arrival, birth and evolution of life on earth. Understand when they formed and what earth was like when they formed. Igneous: solidified rock, pure coming from heart of the world. Metamorphic: rock that has gone through transformations. Sedimentary: useful for revealing history, layers. Any type of rock is made from different minerals (crystals of certain elements) like silicates or carbonates. A silicate would be like quartz, carbonate is like graphite or diamond. Any of these types of rocks could be diff versions of these: rock types tell us how it was made, teaches us the history of earth.
