HISTORY 2720 Lecture 11: Lesson 11 - Earth and Biology
26 Mar 2018
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01:28 pm a. b. c. d. a. b. Big history project: how do earth and life react. Most life is found in biosphere - thin layer of water depth-atmosphere height that life can live. Oxygen holocaust - oxygen killed off a 90% of life throughout 10 my. Astronomical geology, biology have played roles in biospehere. Our orbit is slightly changing but not enough to affect ii. iii. 65 mya dinosaurs wiped out in chicxulub center that created a nuclear warzone. If it were bigger it could have wiped out all life. If it were timed just 30 min differently it could"ve missed and not wiped them out. Large movements of tectonic plates cause massive volcanic explosions that increase co2 and reduce o. Configuration of continents - ice sheets over poles explain ice ages. Cambrian explosion caused by last snowfall effect ii. iii. Biosphere - if earth is a basketball, biosphere is as thin as a piece of paper.
