GEOG 2050 : Exam 1 Notes
Document Summary
Universe formed 13. 5 15 billion years ago. Milky way galaxy- oldest star 13. 6 billion years, disk formed 6. 5-10. 1 billion years ago. Speed of light- 300,000 km/sec (186,000 miles/sec) light year= 10 trillion km (6 trillion miles) Responsible for: -formation of the solar system, -orbits of planets, -moons orbits, -tides, -and more. Solar system formation- rotating solar system begins to form from dust and gas about 4. 6 billion years ago. Heavier materials clump near center to form innermost proto-planets. Lighter materials coalesce near periphery from outer planets. Earth forms out of iron, nickel, manganese, and silicates. Nuclear fusion of hydrogen atoms produces helium and releasing energy. Surface- 5770 (9941 f) core= 28 million f. 8/20/2012 5:34:00 pm: mercury no atmosphere (hot, venus high co^2 atmosphere strong greenhouse, earth- atmosphere, mars- the size of earth thin atmosphere thin atmosphere of co^2. Solar radiance that reaches the earths atmosphere and surface.
