(课件网) 了来害 灾 Listening&Speaking Unit 7Natural Disasters Learning objectives knowledge objectives ability objectives emotional objectives Master the key words and phrases about natural disasters. To be able to discuss the reasons for flight cancellations and natural disasters. To establish the awareness of environmental protection. “自然灾害”是人类依赖的自然界中所发生的异常现象，自然灾害对人类社会所造成的危害往往是触目惊心的。它们之中既有地震、火山爆发、泥石流、海啸、台风、洪水等突发性灾害；也有地面沉降、土地沙漠化、干旱、海岸线变化等在较长时间中才能逐渐显现的渐变性灾害；还有臭氧层变化、水体污染、水土流失、酸雨等人类活动导致的环境灾害。 这些自然灾害和环境破坏之间又有着复杂的相互联系。人类要从科学的意义上认识这些灾害的发生、发展以及尽可能减小它们所造成的危害，已是国际社会的一个共同主题。为此，我们应做好对自然灾害的预测与自我救助的工作。 Natural Disasters Before class： 目录 Listening Speaking CONTENT Homework Warming up 1 2 3 4 Warming up Part 1 Natural Disasters drought floods earthquake typhoon A long period of dry weather when there is not enough water for plants and animals to live. A very large amount of water that covers an area that is usually dry. A sudden shaking of the Earth’s surface that often causes a lot of damage . A very violent tropical storm. What kinds of natural disasters do you know 滑坡 病虫害 泥石流 滑坡是指斜坡上的土体或者岩体，受河流冲刷、地下水活动、雨水浸泡、地震及人工切坡等因素影响，在重力作用下，沿着一定的软弱面或者软弱带，整体地或者分散地顺坡向下滑动的自然现象。运动的岩（土）体称为变位体或滑移体，未移动的下伏岩（土）体称为滑床。 病虫害是病害和虫害的并称，常对农、林、牧业等造成不良影响。 泥石流是指在山区或者其他沟谷深壑，地形险峻的地区，因为暴雨、暴雪或其他自然灾害引发的山体滑坡并携带有大量泥沙以及石块的特殊洪流。 What kinds of natural disasters do you know 将下列表示灾害的词汇与图片相匹配。 Task1 Look and match. 1 2 3 typhoon heat waves drought typhoon 4 5 6 floods earthquake sandstorm drought earthquake floods heat waves sandstorm 将下列表示灾害的词汇与图片相匹配。 Task1 Look and match. A long period of dry weather when there is not enough water for plants and animals to live. A very large amount of water that covers an area that is usually dry. A sudden shaking of the Earth’s surface that often causes a lot of damage . A very violent tropical storm. drought typhoon floods earthquake 将下列表示灾害的词汇与图片相匹配。 Task1 Look and match. 1 heat waves 6 sandstorm A period of unusually hot weather, especially one that continues for a long time. A strong storm in the desert . 思考并勾选出描述自然灾害影响的语句。 Task2 Think and tick. A. Typhoons and floods strike more frequently and with greater force than before. B. Our environment is badly polluted by human activities. D. Some of the natural disasters are caused by human activities. C. My flight is canceled due to the typhoon. 袭击，撞击 频繁地 污染 取消，撤销 Language points analysis 1.strike v. 袭击 ... ...
