GEOLOGIC TIMEGEOLOGIC TIMENATURAL RESOURCESNATURAL RESOURCES

TEST REVIEWTEST REVIEW

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ERASERASPrecambrian-oxygen,stramatollites Precambrian-oxygen,stramatollites (longest 88%)(longest 88%)Paleozoic-plants cambrian explosionPaleozoic-plants cambrian explosionMezazoic-dinosaur and birdsMezazoic-dinosaur and birdsCenozoic-humans elephants and Cenozoic-humans elephants and horseshorses

DATING ROCKSDATING ROCKS• Radioactive isotopes-halflife• Older rocks below younger(superpoisition)• fossils

• Layer 2 is younger than layer 5• Layer 6 is younger than layer 2 but older than

1

FOSSILSFOSSILS• 3000 years old• Trace fossils • Resin• Palentologists-study fossils• Organism- water and sand

ELECTRICITYELECTRICITY• Coal is largest source of generating• Hydropower• Nuclear• Natural gas

COALCOAL• Peat, lignite, bitumen, anthracite• Fossil fuel• Non renewable• Cheap• Air pollution, water• Habitat destruction• Mtn top mining• Open pit mining• Strip mining

TAR SANDSTAR SANDS• Canada• Keystone Pipe lineBitumen• Texas• Environmental concerns• Oil spill• Agriculture• Heat• Lots of h2o and energy

FRACKINGFRACKING• Pumping of water sand and bad chemicals• Materials get in water, natural gas• Region called-Marcellus Shale

MOUNTAIN TOP MININGMOUNTAIN TOP MINING• Dest of ppl homes• Coal• Pollution• BAD water• Flooding• Chemicals pressure

CARBON DIOXIDECARBON DIOXIDE• Global warming• Burning of fossils fuels• CO2

NATURAL GASNATURAL GAS• Use to generate elec• Cheap• GHG• Fracking is used to get• Found with oil• hydrocarbon

NONRENEWABLE NONRENEWABLE ENERGY SOURCESENERGY SOURCES

• Fossil fuels• Tar sand, biomass(trees), oil shale

FOSSIL FUELSFOSSIL FUELS• Oil gas coal non renew• Remains of organic material

OILOIL• 6000 products• Natural gas• Drilling