ERTH 1011 Lecture Notes - Lecture 1: Cambrian Explosion, Archean, Negative Feedback
24 Jan 2015
School
Department
Course
Professor
Document Summary
A set of interacting parts that form a whole. System//natural systems: natural systems share several common traits: Thermodynamically open - mass and energy flows into and out of them such as heat. The feedbacks generate steady state conditions; the disequilbrium is steady state. A process between parts of the system that either amplifies (positive feedback) a change that is underway. One way: volcanism increases co2-- temperature increases water vapour which makes green house. By contrast, negative feedback by increasing greenhouse effect causes wheathering (warm temp) which makes additions of ca+ ions and so on. Also shows how these 2 spheres are in a relationship. Natural systems are nested whitin larger-scale systems and are in turn, made up of smaller scale systems (i. e, their parts") Ex, we as humans have heart and lunges which made up the greater system (a human) Earth starts 4. 6 billion years ago in 5 minutes. Many people believe line began in archaen period.
