GEOG 2050 Chapter : Geography Chapter 11
Document Summary
Geography chapter 11 (earth history, earth interior) (textbook notes) Anthropocene: age of humans transformation of earth"s physical systems; 1800. Earth"s galaxy is the milky way is closest to the andromeda galaxy, but the universe is still considered incomplete and evolving. Star is formed when nebula (cloud of dust and gas) coalesces by gravitational attraction: if not massive enough to trigger nuclear fusion, planets, asteroids, etc. are created, earth is 3rd closest to the sun. Crust: the rigid outermost portion of earth (after many asteroids hitting, the molten surface then cooled and hardened) Interior is hot and under immense pressure due to weight of overlying rock. Earth"s interior has 3 principal layers: core, outer core- composed of a liquid alloy of iron and nickel; outer core is. Inner core- dense elements, mostly iron & nickel liquid b/c pressures are less than the inner core. Lag period-interval (change and response to the system) Feedbacks (positive, negative); + usually destructive, - usually helpful.
