ENV100Y5 Lecture Notes - Lecture 2: Chemotroph, Carbon Cycle, Dynamic Equilibrium

• School: UTM
• Department: Environment
• Course: ENV100Y5
• Professor: Barbara Murck

Document Summary

Chapter 2: earth as a planet: environment consists of everything around us, globalization has exacerbated some environmental problems, age of sun and solar system - 4. 57 ga, the nebular hypothesis. Interstellar cloud inherits elements from previous generations of stars. Jovian (outer) planets / neptune, uranus, saturn, jupiter. Terrestrial (inner) planets / mars, earth, venus, mercury. Constant volcanic activity, meteorite impact bombardment , no liquid water ect. The water molecule has chemical characteristics that support life: water molecules are polar - facilitates bonding with other chemicals. Atmosphere and hydrosphere (early atmosphere) primitive vs. secondary atmosphere. It was hot and dense, not hospitable to life, rich in co2. Oceans began to accumulate: hypotheses that explain life: Life originated from inorganic chemicals in the ocean. Chapter 2: earth as a planet microbes delivered from earth on meteorites - organic compounds found in them. Life has two main influences on the chemistry of the atmosphere: build up oxygen.