ESCI 1001 Lecture Notes - Lecture 6: Plankton, Nuclear Winter, Carboniferous
Document Summary
Need to know the four eons and in the paleozoic, mesozoic and canozoic. Phanerozoic (visible life: paleozoic, mesozoic, cenozoic. The planets were formed by a chain of collisions that tapered off over the first 500 million years. However, there was a later phase, known as the late heavy. Bombardment, which peaked around 3. 9 billion years ago. Our sun is a main sequence star, so as it ages it grows hotter and brighter. We were able to have some fluids on the planet because the composition of the atmosphere was different. The greenhouse gasses were more prevalent so created a warmer climate than what should have existed. Stable surface temps related to atmospheric qualities billions of years ago. Also, oxygen was not in the atmospheric condition before 2. 5 bya. Pre-biotic soup: stanley miller experiment: ammonia, hydrogen, water vapor and methane were converted into amino acids a key component of living organisms.
