Presentation on theme: "Energy Resources and Fossil Fuels"— Presentation transcript:
1 Energy Resources and Fossil Fuels Nonrenewable EnergyEnergy Resources and Fossil Fuels
2 Fuels for Different Purposes Fossil fuels- Remains of ancient organisms that changed into coal, oil, or natural gas.Four main purposes:TransportationManufacturingHeating and coolingGenerating electricityTwo main problems:Limited supplyEnvironmental consequences
3 Electricity- Power on Demand ConvenientTransports quickly across great distancesDisadvantages:Difficult to storeMust generate from other energy sourcesElectric generator- Converts mechanical energy (motion) into electrical energy.Turbine- Wheel that changes the force of a moving gas or liquid into energy that can do the work.
5 Energy UseDramatic differences in fuel use and efficiency throughout the worldU.S. uses more energy per person than any other countries in the world except Canada and the United Arab Emirates.
6 Energy Use #1 use in United States- Industrial use #2 use in U.S.-TransportationJapan and Switzerland-Extensive rail systemsHydroelectric and nuclear power
7 Energy-rich molecules in porous rock formations Fossil Fuel DepositsOil and Natural Gas Formation-Decay of tiny marine organisms causes heatSediment cover causes pressureEnergy-rich molecules in porous rock formationsCoal Formation-Decay of swamp plantsOceans rose and covered with sedimentHeat and pressure caused coal to form
10 Coal Most of world’s fossil fuel reserves Asia and North America- rich in coalDisadvantages:Top-mining coal damages surfaceToxic wasteAir pollution- Sulfur dioxide produces acid rainAdvantages:Relatively inexpensiveNeeds little refining after it’s mined
12 Petroleum Pumped from the ground, a.k.a. crude oil. Petroleum products- anything made from crude oil45% of world’s commercial energy useTrapped in folds, faults, and salt domes which; bound by impermeable layers of rock
13 Environmental Effects Oil spillsLeaking vehiclesRelease of pollutants when burnedCarbon dioxide- Global warmingSulfur dioxide- Acid rainSmog
14 Natural Gas 20 % of world’s nonrenewable energy Methane, CH4 Fewer pollutants when burnedCan be used to generate electricity
15 Fossil Fuels and the Future 90 % of energy used in developed countriesDemand to double by 2050Costs will likely increaseOil reserves- Oil deposits that can be extracted profitably at current prices using current technology.Cost of obtaining influences extractionMore under oceanDifficult to drillExpensive