1、There are thousands of volcanoes all over the world.What makes volcanoes?What happens?The inside of the earth is very hot.Because it is very,very hot,the rock has melted like ice.It has become liquid,like water.It is always boiling,like water in a kettle boiling;you know that the steam and boiling w
2、ater try to get out.Thevery hot melted rock inside the earth also tries to get out.Usually it can not because the outside of the earth is too thick and strong.But in some places the outside of the earth is thin and weak.Sometimes a crack appears.The hot melted rock,which we call“lava”，pushes up thro
3、ugh the crack and bursts through.Steam and gas shoot up into the air and the hot melted lava pours out.Big pieces of rock may be thrown high into the air.After a while the volcano becomes quiet again.The melted lava becomes hard.Later the same thing happens again and again.Each time more hot lava po
4、urs out on top of the cold lava and then becomes hard.In this way a kind of mountain is built up,with a hole down the middle.Perhaps the volcano will then be quiet and no more lava will burst out.Perhaps it will start again hundreds of years later.Vesuvius is the name of a very famous volcano in Ita
5、ly.It first came to life many,many years ago.It was quiet for hundreds of years.Then in the year 79 AD it suddenly burst.A great cloud of smoke shot up into the sky with great burning rocks,which fell all around.Hot lava poured down its sides.About 3,000 people were killed.多积词汇melt vt.使融化；使熔化 n.熔化；熔
6、化物steam n.蒸汽；水汽crack vi.破裂；爆裂 n.裂缝；声变；噼啪声lava n.岩浆shoot up 射出；暴涨；发芽；迅速成长pour out 喷发again and again 一次次地，反复地burst out 喷发 Section Warming Up&Reading Pre-reading读文清障原文呈现AN EXCITING JOBI have the greatest job in the world.I travel to unusual places and work alongside people from all over the world.Somet
7、imes working outdoors,sometimes in an office,sometimes using scientific equipmentand sometimes meeting local peoplealongside/lsaId/adv.在旁边；沿着边 prep.在旁边；沿着的边equipment/IkwIpmnt/n.U设备；装备.Match the word with its meaning.1alongside A在旁边；沿着边2appoint B评估；评价3evaluate C波浪；波涛4wave D潜在性；可能性；潜能5equipment E任命；委派
8、6potential F设备，装备答案：16 AEBCFD.Write down the meanings of phrases in each sentence.1 Several experiences taught me not to be overly enthusiastic aboutsharing my life goals and dreams with too many people._2There is a reach of grassland in the distance._3Mark said that he was not suitable for the job,
9、so he decided to resign from the company._4Compared with cars,bicycles have many advantages._5When the concert ended,I made my way out of the hall.对充满热情在远处适合和比起来前往.Please match the pictures with the names.1Typhoon _ 2.Volcano _3Flood _ 4.Earthquake _5Drought _答案：15 AEBCD .Look at the picture and ans
10、wer the following questions.1How is a volcano formed?_.2How many types of volcanoes do you know?_3.Where is the most possible place for a volcano to erupt?_.The rocks under the earth become hotterand hotter and erupt from the mountainactive volcano;extinct volcano;dormant volcanoNear the oceans.Fast
11、-reading1Read the text quickly and fill in the blanks.The text is a firstperson account of a volcanologist s experiences.The author talked about the of his work,the damage of the _ _ as well his first experience of the volcanic eruption.importancevolcanic eruption2Read the text again and then match
12、the main idea of each part.Part 1:Paras.12 AThe reasons why the writer is enthusiastic about his job.Part 2:Paras.34 BWhat the writer s job is and the importance of his job.Part 3:Para.5 CThe writer s experience of watching the volcanic eruption.答案：Part 1：B Part 2：C Part 3：A.Careful-reading1Read the
13、 text and fill in the blanks in the chart.My jobWork as a volcanologist in HawaiiStill enthu-siastic,greatly interested in the(6)_ and potential of volcanoes.Go to(1)_placesCollecting data for scientists to predict the path of the(2)_Warning people to leave their housesDangerousMy experience of seei
14、ng the volcanic eruption：(3)_ bedStrange sound(4)_ bedroomEruptionFountaining red hot lavaHelp people to avoid the damage of volcanic eruptionClose look at the craterSpecial clothes(5)_ suitsunusuallavaShakingBrightProtectivebeauty2.Read the text and find out the reasons for the results.ResultsReaso
15、ns(1)I enjoy doing my job AThe people living in the path very much.of the lava can be informed to leave their houses.(2)I don t care much aboutBThere was a volcanic eruption the danger of my job.from the side of the mountain.(3)We have saved many CWe wore white protective suits,people in Hawaii.helm
16、ets,boots and special gloves.(4)The eruption of a volcanoDMy work is going to different causes less damage than theplaces and meeting different flowing lava.people.(5)The bedroom became as EDanger makes me feel bright as day.excited and alive.(6)All of us looked like spacemen.FNo one lives at the to
17、p of the mountain.(7)I did not follow the other GI was not experienced two scientists to go down enough.into the crater.答案：(1)(7)DEAFBCG.Study-readingAnalyze the following difficult sentences in the text.1Having collected and evaluated the information,I help other scientists to predict where lava fr
18、om the volcano will flow next and how fast.句式分析 这是一个主从复合句。现在分词的完成式Having collected and evaluated the information 作时间状语，表明该动作发生在 help 之前；where.和 how fast 是两个宾语从句，作 predict 的宾语，其中 how fast 是一个省略形式。尝试翻译 收集和评估了这些信息之后，我就帮助其他科学家一起预测下次火山熔岩将流向何处，流速是多少。2The lava that flows slowly like a wave down the mountai
19、n causes far more damage because it buries everything in its path under the molten rock.句式分析 本句的主句为 The lava causes far more damage,that flows slowly like a wave down the mountain 为定语从句，because it buries.为原因状语从句。而顺着山坡缓缓下流的像浪头一样的火山熔岩所造成的损失却大得多，因为火山岩浆所流经的地方，一切东西都被掩埋在熔岩下面了。尝试翻译3The other two climbed down into the crater to collect some lava for later study,but this being my first experience,I stayed at the top and watched them.句式分析 另外两人攀下火山口去收集供日后研究用的岩浆。我是第一次经历这样的事，所以留在山顶上观察他们。尝试翻译 “课时跟踪检测”见“Unit 5 课时跟踪检测（一）”(单击进入电子文档)谢谢 观 看