介紹火山噴發(fā)(英語)

1、How much do you know aboutvolcano eruption(火山噴發(fā))? 2009011219 李亮 Part one：what is volcano?Some words about volcano： active volcano 活火山活火山 extinct volcano 死火山死火山 volcanic ash 火山灰火山灰 reawaken 再度覺醒再度覺醒 volcanologist 火山學家火山學家 rock-magma巖漿巖漿 crustal movement 地殼運動地殼運動 lava flow 熔巖流熔巖流 Volcanic Explosivity

2、Index 火山爆發(fā)指數(shù)火山爆發(fā)指數(shù) A volcano is a place on the Earths surface (or any other planets or moons surface) where molten rock, gases and pyroclastic debris（火山碎屑） erupt through the earths crust.Volcanic classification active volcano (活火山)extinct volcano （死火山）dormant volcano （休眠火山）Eruption type Quiet erupti

3、on （寧靜式噴發(fā)）Blasting fierce type eruption （爆烈式噴發(fā)）Middle type eruption （中間式噴發(fā)）Part two:Volcanic eruption is how creates? Originally, the interior of the earth filled with hot magma. Under tremendous pressure, from weak magma will break through the earths crust and, where spouted out, causing the volcan

4、o. This picture show us the process about the forming of volcano. Part three:Several big active volcanos in the world1.The Laki(拉基拉基) volcano in Iceland 2.Kilauea（基拉維厄）（基拉維厄） Volcano 3.Mauna Loa(冒納羅亞冒納羅亞) volcano4.Vesuvius(維蘇威維蘇威 ) Volcano5.Mount St Helens (圣海倫斯圣海倫斯 )volcano6.Monte Etna(埃特納埃特納 ) vol

5、cano7. Sangay(桑蓋桑蓋 ) National Park volcanoPart four: the harms and benefits of volcano Harm1.Cause great bad impact on the global climate2. Ash and rain mixed form mudslides（泥石流）3. ash can cause respiratory diseases（呼吸道疾?。﹎any of the volcanic materials have important industrial and chemical uses. 2. Volcanic ash that has been weathered (風化)greatly improves soil fertility.BenefitsPart five:how to protect yourself in the volcano erupti