AS101 Final: Final Exam Review.docx
Document Summary
Chapter 12 evolution of the solar system. Main composition is oxygen, carbon, hydrogen, and nitrogen. Supernovae created heavier elements not created by big bang. Solar nebula theory states solar system forms when cloud of dust and gas contracts (by gravity) around a new star. Collisions between particles flatten cloud into disk shape. Planets and other objects than form within the disk and the solar wind blows any excess gas and dust away. Theory implies planets form around stars; stars should have multiple planets. Orbits lie on same plane and all orbits go in the same direction. Sun, most planets and moons rotate in the same direction. Terrestrial planets: mercury, venus, earth, mars, are small, rocky and closer to the sun, have craters. Jovian planets: jupiter, saturn, uranus, neptune, are large, and gassy, they contain a lot of hydrogen, helium and methane, farther than terrestrial planets, have rings, saturn is most noticeable, more moons than the terrestrial planets.
