ISB 201 1st Edition Lecture 21 Outline of Last Lecture I. Causes of Ozone ThinningII. Source v. Sink Outline of Current Lecture II. Conventional EnergyIII. Electricity IV. Fossil FuelsCurrent LectureI. Conventional Energy: traditional, fossil-fuel, non-renewable A. Renewable resource: natural resource that can be replaced or replenished with time (Sun and Wind)B. Non-renewable: natural resources that cannot be re-made or re-grown at a scale comparable to consumptionC. Renewable does NOT mean inexhaustible; ex: Easter Island treesD. Renewable energies: alternative energies attempt to take advantage of renewable resources and are considered more sustainable practicesE. Conventional energy: rely mostly on LIMITED fossil fuelsII. ElectricityA. Electrical energy: burns fossil fuels1. Condescend light bulbs- one of the worst uses of energy; 10% light and 90% unusable heat2. Small things add up ex: charging phone when fully chargedB. How is it produced?1. Gaining and losing electrons to create a different electrical charge; like charge = repel; unlike charge = attractC. Convert fossil fuels into electricity1. Convert fossil fuels into heat ie. Burning2. Convert heat into mechanical energy ie. Turbine movement to strip electrons3. Generator to convert mechanical into electrical energy4. Store electricity for useD. Electrical grid: an interconnected network of delivering electricity from generating plants, to transformers, then through transmission lines to consumers1. Need to be monitored frequentlyThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.2. 2003 Black outIII. Fossil fuels supply most energy (coal, oil, natural gas)A. Cover 87% of world’s commercial energy needs1. Oil 37%2. Coal 26%3. Natural gas 24%4. Nuclear power 6%5. Alternative energies 7%B. Richer countries consume more, 80% of energy, BUT this is changingC. Formation of fossil fuels: Oil and natural gas1. Partially decomposed remains of aquatic organisms2. Sink and covered by sediment3. Over LONG period of time (millions of years) heat and pressure turn into goopy messy liquid= oil and gasD. Formation of coal1. Partially decomposed plants2. Sink and covered by sediment3. Over LONG periods of time heat and pressure press out water and leave hardened flammable black solidE. In 1947, US the largest exporter of oil, today we are the largest
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