GEOL 1001 Chapter : Geology Exam 1 Chapters 1 3
Document Summary
Solar system view went from a geocentric (earth is the center of the universe) to a heliocentric (sun is the center of the universe) model. 4. ) red shifted light from distant galaxies (doplar effect) led to the expanding universe theory. 5. ) it is generally accepted that the big band occurred 13. 7 billion years ago. 6. ) the first atoms (h and he) of the universe developed within minutes of the big bang, forming vast gas clouds (nebulae). 7. ) gravity caused clumps of gas in the nebulae to coalesce into flattened disks with bulbous centers that become so hot and dense that fusion reactions began leading the first true stars. 8. ) all elements were created via big bang and stellar nucleosynthesis or supernovae. 9. ) the nebular theory of solar system formations is the concept that planets grow out of rings of gas, dust, and ice surrounding a newborn star. The earth produces a magnetic field that deflects solar wind and cosmic rays.
