1、Unit 5SectionStep 1Step 2Step 3List all the reasons that can cause the Dead Sea dry up.Please read the passage carefully to get the answer.Rapidly dropping water levels of the Dead Sea,the lowest point on the earths surface,has been a source of ecological(生态的)concern for years.Now a drilling project
2、 led by researchers from Tel Aviv University and Hebrew University shows that water levels have risen and fallen by hundreds of meters over the last 200,000 years.Directed by Prof.Zvi Ben-Avraham of TAUs Minerva Dead Sea Research Center and Prof.Mordechai Stein of the Geological Survey of Israel,res
3、earchers drilled 460 meters under the sea floor and got sediments(沉积物)spanning 200,000 years.The material recovered showed the areas past climatic conditions and may allow researchers to forecast future changes.Layers of salt indicated several periods of dryness and very little rainfall,causing wate
4、r to fall back and salt to gather at the center of the lake.During the last interglacial(间冰期的)period,about 120,000 years ago,the sea came close to drying up entirely,the researchers found,with another period of extreme dryness taking place about 13,000 years ago.Today,the Dead Sea lies 426 meters be
5、low sea level and is moving back rapidly.Despite this historical case,there is still cause for concern,says Prof.Ben-Avraham.In the past the change was climate-driven,the result of natural conditions;today,the lake is threatened by human activity.“What we see happening in the Middle East is somethin
6、g that mimics(模 仿)a severe dry period,but this is not climate-driven,this is a man-made phenomenon，”he warns,caused by increasing amounts of water being taken from rivers for irrigation before it reaches the Dead Sea.Finally,this prevents the refilling of the sea by the waters of the Jordan River.1f
7、orecast vt.预测2indicate vt.表明3dry up 干涸4take place 发生5despite prep.尽管6phenomenon n.现象Section_Warming Up&Reading Pre-readingPre-reading Please match the words with their proper meanings.1alongside Anext to or along the side of something2appoint Bto carefully consider something to see howuseful or valu
8、able it is3evaluate Ca line of raised water that moves across thesurface of the sea答案：16 AEBCFD4wave Dthe possibility that something will developin a certain way,or have a particular effect5equipment Eto choose someone for a position or a job6potential Fall the special tools,machines,clothes etc.tha
9、t you need for a particular activity Background Introduction&Lead-in()Background IntroductionReading is a first-person account of a volcanologists experiences.He loves his job very much because he can help protect ordinary people from one of the most powerful forces on earth.His job is collecting in
10、formation for a database about Mount Kilauea and helping other scientists to predict where lava from the volcano will flow next and how fast.Once,he watched an eruption and then collected some lava for later study.After many years,he is still enthusiastic about his job.Reading contains a picture tha
11、t is an absolutely fantastic sight.After a glance at the title of the text and the headlines within it we know that it is an account,in which there are many emotion expressions.Then we can understand the topic of the text and how the information is organized.()Lead-in1Please match the pictures with
12、the names.答案：(1)(5)AEBCD(1)Typhoon _(2)Volcano _(3)Flood _ (4)Earthquake _(5)Drought _2How is a volcano formed?_The rocks under the earth became hotter and hotter anderupted from the mountain.While-readingFast-reading()Read the text and then answer the following questions.1Where is Mount Kilauea?_2W
13、hat is the volcanologist wearing when getting close to the crater?_ _It is in Hawaii.He is wearing white protective suits that covered his whole body,helmets,big boots and special gloves,just like a spaceman.()Read the text again and then match the main idea of each part.Part 1：Paras(12)AThe reasons
14、 why the writer isenthusiastic about his job.Part 2：Paras(34)BWhat the writers job is and theimportance of his job.Part 3：Para(5)CThe writers experience of watching the volcano eruption.答案：Part 1：B Part 2：C Part 3：ACareful-reading()Scan the text and then choose the best answer according to the text.
15、1The writer doesnt mind the occasional danger of his job because_.Ahe travels to unusual places and meets interesting people from all over the worldBhe likes the different ways of workingChe is excited about dangers and feels aliveDhe thinks his job is the most important2Why does the lava that flows
16、 slowly down the mountain cause far more damage than the boiling rock that erupts from the volcano?ABecause it buries everything in its path.BBecause most people live near the top of Mount Kilauea.CBecause the lava is in a higher temperature.DBecause the volcanologists can predict it.3As a result of
17、 the volcanologists work,_.Aother scientists can predict the progress of lava from the volcanoBmany people can move their houses out of the wayCscientists can change the way the lava flowsDthe eruption may be prevented from breaking out4Which of the following descriptions of an eruption is NOT corre
18、ct?AIt causes great damage near the top of Mount Kilauea.BThe places where the lava flows are usually seriously damaged.CIt can be seen from a distance,even in a house garden.DThe lava can fountain hundreds of meters.5 What did the author do after he was appointed as a volcanologist?AHe collected in
19、formation about Mount Kilauea on the spot.BHe analyzed the data and predicted where the lava would flow.CHe persuaded people to move their homes out of the path of the lava.DHe saved people who were covered with lava.答案：15 CAAAB()Read the passage and write down the answers according to the word limi
20、ts.1What shows that the author likes his job in Paragraph 1 and the last paragraph?_ _ _I have the greatest job in the world.Danger excites me and makes me feel alive.Today,I am just as enthusiastic about my job as the dayI first started.I am still amazed at their beauty as well as their potential t
21、o cause great damage.2What does the writer mean by using“lucky”in the sentence“I was lucky enough to have a much closer look at it”？(no more than 20 words)_It was his first sight of an eruption.It was the first time for him to watch the crater.3Why was it difficult for the writer to walk towards the
22、 edge of the crater?(no more than 15 words)_The author was wearing special protective clothes thatmade it difficult to walk.Study-readingAnalyze the following difficult sentences in the text.1The lava that flows slowly like a wave down the mountain causes far more damage because it buries everything
23、 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。尝试翻译 _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。2The other two climbed down into the crater to collect some lava for later s
24、tudy,but this being my first experience,I stayed at the top and watched them.尝试翻译 _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。Fill in the blanks according to the text.AN EXCITING JOBIm a volcanologist.I travel to unusual places and meet interesting people from all over the world,but Im never (bor
25、e)Having collected and (evaluate)the information of volcanoes,I help other scientists (predict)the information about volcanoes,but (fortunate),we cannot move peoples homes out of the way,and many houses have Post-readingboredevaluated(to)predictunfortunatelyhave been covered with lava or to the grou
26、nd.Ill never forget my first sight of an eruption red hot lava (fountain)hundreds of metres into the air,was an absolutely fantastic sight.We scientists(wear)special clothes and slowly made our way to the edge of the crater and looked down into red,boiling centre.I am still amazed at volcanoes beauty as 10 as their potential to cause great damage.burnedwasfountainingwhichworethewell
