BIO 1130 Lecture Notes - Lecture 6: Cambrian Explosion, Magnesium Oxide, Hydrogen Sulfide

• School: University of Ottawa
• Department: Biology
• Course: BIO 1130
• Professor: Jon Houseman

Document Summary

Hadean (4,600 3,800 ma) formation of the solar system and planet, ends with origin of life. Earth is about 4 billion years old. Planet gets hit by rocks, the earth heats back up from this energy, it melts from the impact and creates a molten blob of lava. The meteors that are hitting the earth are filled with water, so they are depositing water on the earth. The water vapor does not disappear when it goes through the cooling and heating cycles, but instead it creates an atmosphere. Rain starts happening, and the cycle begins again. This keeps happening until we get a stabilization of our solar system, and the earth can cool adequately enough where it has a cover of crust. On the crust there is an oceanic layer of water, and inside the layer of water we end up with our first bacterium. This whole period of time is 800 million years.