EARTHSC 1100 Lecture Notes - Lecture 9: Nebular Hypothesis, Roygbiv, Big Bang

• School: Ohio State University
• Department: Earth Sciences
• Course: EARTHSC 1100
• Professor: Steven Lower

Document Summary

Possible exam question: what did dr. lower bring to class to demonstrate the earth going around the sun? . Answer: a ball with a string tied to it. Gravity pulls hydrogen atoms together, increasing the mass of the material. This also causes the temperature to increase as more material is crammed into a small space. Eventually the hydrogen atoms fuse together, generating a spark that ignites the ball. The rst light, star light, pierced the dark universe 100 400 million years after the big bang. Extremely hot temperatures cause hydrogen atoms to fuse together, creating larger elements (remember atomic number) and generate energy (i. e. the star glows) When the hydrogen (fuel) runs out, the mass will be pulled inward and eventually the star will explode, releasing heavy elements to the universe. There"s a balance of gravity pulling matter inward and fusion creating outward pressure in the star. Larger stars burn hotter and create heavier elements (up to iron)