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Transcript of Ppton Natural Disaster] LATEST
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Natural DisastersNatural Disasters
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Types of Natural DisastersTypes of Natural Disasters
TornadoesTornadoes
HurricanesHurricanes
EarthquakesEarthquakes
VolcanoesVolcanoes
FloodsFloods
TsunamisTsunamis WinterWinter
StormsStorms
WildfiresWildfires
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EarthquakeEarthquake
Sudden movement of theSudden movement of theearth's crust caused by theearth's crust caused by therelease of stress collectedrelease of stress collectedalong faults or by volcanicalong faults or by volcanic
activityactivity
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EarthquakeEarthquake
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HurricaneHurricane
If winds reach 74 mph, then they are called:If winds reach 74 mph, then they are called: "hurricane""hurricane" (the North Atlantic Ocean, the Northeast(the North Atlantic Ocean, the Northeast
Pacific Ocean east of the dateline, or the South PacificPacific Ocean east of the dateline, or the South Pacific
Ocean east of 160E)Ocean east of 160E) "typhoon""typhoon" (the Northwest Pacific Ocean west of the(the Northwest Pacific Ocean west of thedateline)dateline)
"severe tropical cyclone""severe tropical cyclone" (the Southwest Pacific(the Southwest PacificOcean west of 160E or Southeast Indian Ocean east ofOcean west of 160E or Southeast Indian Ocean east of90E)90E)
"severe cyclonic storm""severe cyclonic storm" (the North Indian Ocean)(the North Indian Ocean) "tropical cyclone""tropical cyclone" (the Southwest Indian Ocean)(the Southwest Indian Ocean)
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LightningLightning
Brilliant electric spark discharge inBrilliant electric spark discharge in
the atmosphere, occurring within athe atmosphere, occurring within athundercloud, between clouds, orthundercloud, between clouds, orbetween a cloud and the groundbetween a cloud and the ground
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TsunamiTsunami
An unusually large sea wave producedAn unusually large sea wave produced
by a seaquake or undersea volcanicby a seaquake or undersea volcaniceruptioneruption
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Effects of TsunamisEffects of TsunamisIndian Ocean TsunamiIndian Ocean Tsunami December 26, 2005December 26, 2005
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HowHowTsunamisTsunamis ImpactImpact
theE
nvironmentthe
Envir
onment
Houses, Buildings, and other StructuresHouses, Buildings, and other Structuresdestroyeddestroyed
Loss of powerLoss of power
ErosionErosion
Fresh water contaminatedFresh water contaminated
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VolcanoVolcano
Vent in the earth's crust throughVent in the earth's crust through
which lava, steam, ashes, etc., arewhich lava, steam, ashes, etc., areexpelled, either continuously or atexpelled, either continuously or atirregular intervalsirregular intervals
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FloodFlood
Temporary rise of the water level, asTemporary rise of the water level, asin a river or lake or along a seacoast,in a river or lake or along a seacoast,resulting in its spilling over and outresulting in its spilling over and out
of its natural or artificial confinesof its natural or artificial confinesonto land that is normally dry. Floodsonto land that is normally dry. Floodsare usually caused by excessiveare usually caused by excessiverunoff from precipitation orrunoff from precipitation orsnowmelt, or by coastal storm surgessnowmelt, or by coastal storm surgesor other tidal phenomena.or other tidal phenomena.
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TornadoTornado
Violently rotating column of airViolently rotating column of airextending from a cumulonimbusextending from a cumulonimbuscloud to the Earth, ranging in widthcloud to the Earth, ranging in widthfrom a few meters to more than afrom a few meters to more than akilometer and whirling at speedskilometer and whirling at speedsbetween 40 and 316 mi per hour.between 40 and 316 mi per hour.
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Effects of Tornadoes in AlabamaEffects of Tornadoes in Alabama
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DroughtDrought
Long period of abnormally low rainfall,Long period of abnormally low rainfall,especially one that adversely affectsespecially one that adversely affectsgrowing or living conditions.growing or living conditions.
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Drought FactsDrought Facts
The cost of losses due to drought in theThe cost of losses due to drought in theUnited States averages $6United States averages $6--8 billion every8 billion everyyear, but range as high as $39 billion foryear, but range as high as $39 billion for
the three year drought of 1987the three year drought of 1987--1989,1989,which was the most costly natural disasterwhich was the most costly natural disasterdocumented in U.S. history.documented in U.S. history.
The two major droughts of the 20thThe two major droughts of the 20th
century, the 1930s Dust Bowl drought andcentury, the 1930s Dust Bowl drought andthe 1950s drought, lasted five to seventhe 1950s drought, lasted five to sevenyears and covered large areas of theyears and covered large areas of thecontinental U.S.continental U.S.
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Heat WaveHeat Wave
An air mass of high temperatureAn air mass of high temperaturecovering an extended area and movingcovering an extended area and moving
relatively slowlyrelatively slowly A period of abnormally hot and usuallyA period of abnormally hot and usually
humid.humid.
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HowHowVolcanic EruptionsVolcanic Eruptions Impact theImpact the
Envir
onment
Envir
onment
Houses, buildings, and otherHouses, buildings, and otherstructures destroyedstructures destroyed
FiresFires Toxic gases released into theToxic gases released into the
atmosphereatmosphere
Carbon dioxide emitted fromCarbon dioxide emitted fromvolcanoes adds to the naturalvolcanoes adds to the naturalgreenhouse effect.greenhouse effect.
Loss of habitatLoss of habitat
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HowHowBlizzardsBlizzards Impact theImpact the
Envir
onment
Envir
onment
Flooding when snows meltFlooding when snows melt
Trees fallTrees fall
Power outagesPower outages HypothermiaHypothermia
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HowHowFloodingFlooding Impacts theImpacts the
E
nviro
nmentE
nviro
nment DiseaseDisease
Loss of habitatLoss of habitat
Houses, buildings, and otherHouses, buildings, and otherstructures destroyedstructures destroyed
Household wastes get into the waterHousehold wastes get into the water
systemsystem Power outagesPower outages
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HowHowTornadoesTornadoes Impacts theImpacts the
E
nviro
nmentE
nviro
nment Tornadoes could hit hazardous orTornadoes could hit hazardous or
toxic materials which could carriedtoxic materials which could carriedby a thunderstorm and thenby a thunderstorm and then
transported along ways downtransported along ways downstream.stream.
Could transport certain types ofCould transport certain types of
small animals and plants across thesmall animals and plants across thelandland
Destroys topsoil and cropsDestroys topsoil and crops
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HowHowDroughtDrought Impacts theImpacts the
EnvironmentEnvironment Young trees dieYoung trees die Dried up lakes and other water sourcesDried up lakes and other water sources Loss of livestock and cropsLoss of livestock and crops People use more fuel during droughts.People use more fuel during droughts.
Losses or destruction of fish and wildlife habitatLosses or destruction of fish and wildlife habitat Lack of food and drinking water for wild animalsLack of food and drinking water for wild animals Increase in disease in wild animals, because of reducedIncrease in disease in wild animals, because of reduced
food and water suppliesfood and water supplies Migration of wild animals, leading to a loss of wildlife inMigration of wild animals, leading to a loss of wildlife in
some (droughtsome (drought--stricken) areas and too many wildlife instricken) areas and too many wildlife in
areas not affected by droughtareas not affected by drought Increased stress on endangered speciesIncreased stress on endangered species Lower water levels in reservoirs, lakes, and pondsLower water levels in reservoirs, lakes, and ponds Loss of wetlandsLoss of wetlands More firesMore fires
Wind and water erosion of soils, reduced soil qualityWind and water erosion of soils, reduced soil quality