Astronomy 2021A/B Chapter Notes - Chapter 4: Escape Velocity, Snowball Earth, Subduction
1 Jun 2017
School
Department
Course
Professor
Document Summary
Earth"s habitability is due to a combination of size and distance from the sun, both of which have shaped its geology and atmosphere. Without this shielding, it is likely that a significant portion of our planet"s atmosphere would have been stripped away into space by now. 4. 2 reconstructing the history of earth and life. Out of the 4. 5 billion years that earth has existed, humans have occupied earth for only a few thousand years. History is recorded in rocks and fossils: fossils relics of organisms that lived and died long ago that preserve clues we can unravel to learn about the past. Matter is found in three basic phases: solid, liquid, and gas: atoms in liquids and gases are always moving they are hard to study, it is easier to study solids the atoms are locked in place. Geological record the entirety of the layers of rock strata, deposits laid by volcanism.
