介绍火山喷发英语省公开课一等奖全国示范课微课金奖

Howmuch

doyouknowabout

volcanoeruption

(火山喷发)?————011219李亮

1/18Partone：whatisvolcano?Somewordsaboutvolcano：

activevolcano活火山extinctvolcano死火山

volcanicash火山灰reawaken再度觉醒

2/18volcanologist火山学家rock-magma岩浆

crustalmovement地壳运动lavaflow熔岩流

VolcanicExplosivityIndex火山暴发指数3/18

volcanoAvolcanoisaplaceontheEarth‘ssurface(oranyotherplanet’sormoon‘ssurface)wheremoltenrock,gasesandpyroclasticdebris（火山碎屑）eruptthroughtheearth'scrust.4/18Volcanicclassification

activevolcano(活火山)extinctvolcano（死火山）dormantvolcano（休眠火山）5/18EruptiontypeQuieteruption（宁静式喷发）Blastingfiercetypeeruption（爆烈式喷发）Middletypeeruption（中间式喷发）6/187/188/189/18Parttwo:

Volcaniceruptionishowcreates?

Originally,theinterioroftheearthfilledwithhotmagma.Undertremendouspressure,fromweakmagmawillbreakthroughtheearth'scrustand,wherespoutedout,causingthevolcano.

10/18Thispictureshowustheprocessabouttheformingofvolcano.11/18Partthree:

Severalbigactivevolcanosintheworld12/181.TheLaki(拉基)volcanoinIceland2.Kilauea（基拉维厄）Volcano3.MaunaLoa(冒纳罗亚)volcano4.Vesuvius(维苏威)Volcano13/185.MountStHelen's(圣海伦斯)volcano6.MonteEtna(埃特纳)volcano7.Sangay(桑盖)NationalParkvolcano14/18Partfour:

theharmsandbenefitsofvolcanoHarm1.Causegreatbadimpactontheglobalclimate2.Ashandrainmixedformmudslides（泥石流）3.ashcancauserespiratorydiseases（呼吸道疾病）15/18manyofthevolcanicmaterialshaveimportantindustrialandchemicaluses.2.Volcanicashthathasbeenweathered(风化)greatlyimprovessoilfertility.Benefits16/18Partfive:

howtoprotectyourselfinthevolcanoeruption?Theo