GEOB 102 Study Guide - Midterm Guide: Chemical Energy, Canadian Shield, Royal Assent

• School: UBC
• Department: Geographical Biogeosciences
• Course: GEOB 102
• Professor: Nina Hewitt

Document Summary

Terms, concepts and definitions referred to in the first lecture, e. g. , latitude, longitude, maps, system: an ordered and interrelated set linked by flows of energy and matter. System of interconnected flow paths of energy and/or matter with a boundary through which energy and/or matter can enter and leave the system inputs of energy and matter energy and material conversion/storage . Flow system that is completely self-contained within a boundary through which no matter or energy is exchanged with the external environment. No inputs or outputs of matter, system"s flowing materials move endlessly in a series of interconnected paths or loops example: earth: positive feedback: enhances original change. Vanishing arctic ice: temperatures rise arctic sea ice melts reflective ice disappears darker ocean absorbs more heat temperature rises again . Melting permafrost: temperature rises permafrost thaws methane released temperature rises : negative feedback: diminishes original change (tends to preserve the starting state) Steady state: values fluctuate around a steady average.