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11.2 Fossil Fuels

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by

Katelynn Dorn

on 29 October 2014

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Transcript of 11.2 Fossil Fuels

Fossil Fuels and the Environment
strip mining of coal- leaves deep ditches that expose rock acid (acid rain)
air pollution- sulfur dioxide
gas in cars
oil spills
Fossil Fuels
energy sources in earth- coal, petroleum, natural gas: formed from living things
consist of hydrocarbons
contain energy from plants and animals that lived hundreds or thousands of years ago
when burned:
heat
light
Types of Coal
partial decomposition of plant remains produces peat
lignite- peat with the water and gases squeezed out of it from sediments (brown coal)
pressure of sediments -> bituminous coal (soft coal)
anthracite- created from high temp. & pressure where earth's crust folds (80-90% C)
Petroleum and Natural Gas
liquid and gas hydrocarbons
formation
microorganims die in oceans and lakes and remains accumulate on floor, buried by sediments
heat and pressure under sediment increased, chemical changes-> petroleum and gas
deposits
sedimentary rock becomes buried
pressure forces out water and hydrocarbons
petroleum and water move up to cap rock
oil reservoir traps natural gas, petroleum, water
Fossil Fuel Supplies
coal is most abundant
nonrenewable, 200 years
more petroleum under ocean edges of North America?
natural gas may be deeper than 4600 m below earth's surface
oil shale- petroleum, mining oil from shale is $
11.2 Fossil Fuels
Coal
partially decomposed plant remains in swamps
carbonization-
partially decomposed plants/trees buried in swamp mud
bacteria eat it and release CO2 and CH4 to leave carbon remains
Uses of Fossil Fuels
transportation, farming, industry
crude oil- unrefined petroleum
petrochemicals- tar, wax, rubber, medicines, fertilizer
Full transcript