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ID:49810994
大小:917.00 KB
页数:18页
时间:2020-03-02
《介绍火山喷发(英语).ppt》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、Howmuchdoyouknowaboutvolcanoeruption(火山喷发)?————2009011219李亮Partone:whatisvolcano?Somewordsaboutvolcano:activevolcano活火山extinctvolcano死火山volcanicash火山灰reawaken再度觉醒volcanologist火山学家rock-magma岩浆crustalmovement地壳运动lavaflow熔岩流VolcanicExplosivityIndex火山爆发指数volcanoAvolcanoisaplace
2、ontheEarth‘ssurface(oranyotherplanet’sormoon‘ssurface)wheremoltenrock,gasesandpyroclasticdebris(火山碎屑)eruptthroughtheearth'scrust.Volcanicclassificationactivevolcano(活火山)extinctvolcano(死火山)dormantvolcano(休眠火山)EruptiontypeQuieteruption(宁静式喷发)Blastingfiercetypeeruption(爆烈式喷发)Midd
3、letypeeruption(中间式喷发)Parttwo:Volcaniceruptionishowcreates?Originally,theinterioroftheearthfilledwithhotmagma.Undertremendouspressure,fromweakmagmawillbreakthroughtheearth'scrustand,wherespoutedout,causingthevolcano.Thispictureshowustheprocessabouttheformingofvolcano.Partthree:
4、Severalbigactivevolcanosintheworld1.TheLaki(拉基)volcanoinIceland2.Kilauea(基拉维厄)Volcano3.MaunaLoa(冒纳罗亚)volcano4.Vesuvius(维苏威)Volcano5.MountStHelen's(圣海伦斯)volcano6.MonteEtna(埃特纳)volcano7.Sangay(桑盖)NationalParkvolcanoPartfour:theharmsandbenefitsofvolcanoHarm1.Causegreatbadimpacton
5、theglobalclimate2.Ashandrainmixedformmudslides(泥石流)3.ashcancauserespiratorydiseases(呼吸道疾病)manyofthevolcanicmaterialshaveimportantindustrialandchemicaluses.2.Volcanicashthathasbeenweathered(风化)greatlyimprovessoilfertility.BenefitsPartfive:howtoprotectyourselfinthevolcanoeruptio
6、n?TheonlywayGowhilethegoingisgood.(三十六计,走为上计。)Thankyouforyourwatching!
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