《Earth first》SectionⅠPPT
第一部分內(nèi)容：教材背景
科學(xué)家警告：北極海冰的加速融化會(huì)造成不可控制的全球氣候變化。
Melting Arctic Sea Ice Could Start
Uncontrollable Global Climate Change
The rapid melting of the Arctic sea ice could be about to bring about catastrophic(災(zāi)難性的) events across the world, scientists have warned.
The effects of the melting ice could be felt as far away as the Indian Ocean as the warm weather sets off 19 global tipping points(臨界點(diǎn)), according to the new Arctic Resilience Report. Those tipping points happen when a natural system quickly changes, leading to great effects on nearby ecosystems that might never be reversed(徹底轉(zhuǎn)變)．
In the Arctic, they include growing vegetation that stops snow and ice and so absorbs more heat, and the release of methane(甲烷) from the Arctic as it warms. The report includes a range of different disastrous events that are likely to be produced by the warming poles.
The findings come just as climate scientists have warned that sea ice in the Arctic appears to be melting far more quickly than expected as the result of high temperatures.
Air over the Polar ice cap has been 9－12 degrees Celsius above average over the last four weeks, according to the Danish Meteorological Institute(DMI)．Through last week, temperatures reached melting point, putting them far above the expected temperature and serving as a dangerous signal for the sea ice there.
The temperature is “by far the highest recorded”，DMI researcher Martin Stendel told the AFP.“What we are observing is very unusual.”
At this time of year, the Arctic Ocean would be expected to start freezing up into sea ice again. But it isn’t happening.
“Not only was the ice not growing as it would normally, there was further melting due to warm air coming in，” he told the news agency.
That effect is being caused by a number of factors—not only climate change, but also temporary weather phenomena like El Niño. But those temporary(短暫的) things are being strengthened by climate change, which is the final driver of the melting sea ice, scientists said.
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Earth first PPT，第二部分內(nèi)容：新知感悟
重點(diǎn)單詞
閱讀詞匯 (在不認(rèn)識(shí)的單詞前劃√)
□shark n． □dive v.
寫作詞匯
1. ________ v. 把……作為目標(biāo)
2. ________ n. (尤指通過行為表現(xiàn)出的對某事的一般)看法，態(tài)度
拓展詞匯
3. ________ adj.使(某人)驚恐，嚇唬→scared adj.對……感到驚慌的；嚇壞了的
4. __________ adv.幸運(yùn)地→fortunate adj.幸運(yùn)的；吉祥→fortune n．幸運(yùn)；運(yùn)氣
5. __________ n．滅絕，絕種→extinct adj.絕種的；消亡了的
重點(diǎn)短語
1. ________ 恐懼，擔(dān)心
2．________________ 講述……的故事
3．____________________________害怕……
4．________________ 由于，因?yàn)?/p>
5．________________ 切斷；阻斷；隔絕
6．___________________ 對……有影響
重點(diǎn)句型
1.形容詞(短語)作狀語：Some people stopped swimming in the sea, ___________________________________________ (由于害怕電影里可怕的生物)．
2．was/were doing...when...：In 1980, Benchley ________________ (正在潛水就在這時(shí)) he came across an awful sight.
3．部分否定：Fortunately, ________________ (并非每個(gè)人) who watched the film Jaws became afraid of sharks—some became interested in understanding them.
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Earth first PPT，第三部分內(nèi)容：語篇理解
Ⅰ Read the text and fill in the blanks.
Before the film Jaws
↓People had a longheld idea that the great white shark is 1.________．
After the film Jaws
↓ People became more 2. ________of sharks.
The number of large sharks fell quickly due to fear of sharks and 3.________．
In 1980
↓Peter Benchley admitted that his book was 4.________about sharks’ behaviour.
Today
↓More people want to 5.________the sharks from extinction.
Ⅱ Read the text carefully and choose the best answer according to the text.
1．What is the writer’s purpose of writing the passage?
A．To recommend the film Jaws and the book to people.
B．To criticize Peter Benchley’s misleading description of sharks.
C．To raise people’s awareness of shark protection.
D．To inform people that sharks are dangerous.
2．According to the passage, which one is WRONG about the film Jaws?
A．A woman died as a result of a shark’s attack.
B．It was popular with huge audiences.
C．It changed people’s longheld idea of shark as a dangerous animal.
D．It won a great reputation in the field of film.
3．Why did the number of large sharks fall quickly?
A．Because of the climate change.
B．Because of people’s killing and finning.
C．Because of lacking of enough food.
D．Because of the pollution of the ocean.
4．Nowadays, what is people’s attitude towards protecting sharks?
A．Neutral.
B．Indifferent.
C．Disapproval.
D．Favorable.
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Earth first PPT，第四部分內(nèi)容：詞匯精研
1. scare v．使(某人)驚恐；嚇�！．恐慌；恐懼
(教材P62)People have always been scared of sharks, but Jaws made things worse.
人們一直都害怕鯊魚，但《大白鯊》使情況變得更糟。
(1)scare...away/off 把……嚇跑
(2)scaring adj. 令人害怕的；嚇人的
scared adj. 對……感到驚慌的；嚇壞了的
be scared of 害怕……
be scared to do... 害怕做……；不敢做……
①His sudden appearance gave me a scare when I was reading an interesting book.
我正在讀一本有趣的書，他的突然出現(xiàn)嚇了我一跳。
②Last night the sudden thunder ______ (scare) the children.
昨天晚上，突然的雷聲嚇著了那些孩子。
③They managed to scare the bear __________ with a torch.
他們設(shè)法用火把把熊嚇跑了。
④Having made mistakes, he is scared __________ facing his strict teacher.
他犯了錯(cuò)，不敢去面對嚴(yán)厲的老師。
⑤Seeing many cars going up and down the street, the boys were scared __________ (cross) the street.
看到馬路上來來往往的車輛，那些男孩子不敢過馬路。
2. due to 由于；由……造成；應(yīng)支付；歸功于
(教材P62) This was not only due to fear of sharks, but also finning.
這不僅是因?yàn)楹ε迈忯~，而且還因?yàn)轷忯~的鰭。
due adj. 應(yīng)得的；應(yīng)付的；預(yù)定的
be due to sb. 應(yīng)付給某人
be due to sb./sth. 歸因于某人/某物
be due to do sth. 預(yù)定/預(yù)期做某事
①The flight was put off due to the heavy fog.
這架班機(jī)因大霧停航。
②Any money that is due ________ you will be paid before the end of the month.
欠你的錢將在月底之前全部支付給你。
③The bus was due __________ (arrive) at 5 p．m., but it arrived one hour late due to __________ (hold) up by the heavy fog.
公共汽車預(yù)計(jì)下午五點(diǎn)鐘到達(dá)，但由于大霧的阻礙它晚了一個(gè)小時(shí)。
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Earth first PPT，第五部分內(nèi)容：句型精析
1.形容詞(短語)作狀語
(教材P62)Some people stopped swimming in the sea, afraid of the horrible creature from the film.
有些人因?yàn)楹ε码娪袄锟膳碌纳锒辉僭诤＠镉斡尽?/p>
句中“afraid of the horrible creature from the film”是形容詞短語作狀語，相當(dāng)于because some people were afraid of the horrible creature from the film。
形容詞(短語)作狀語可以表示方式、原因或伴隨狀況等，可位于句首、句末或句中，常用逗號(hào)與句子其他成分隔開。
①Cold and hungry, he stopped working and went home.
因?yàn)橛掷溆逐I，他停止工作回家了。
②I was back at home at almost midnight, thirsty and __________ (tire)．
快到半夜時(shí)我才回到家，又渴又累。
③__________ (obvious), a good habit can help us to speed up to reach our destinations.
很顯然，好習(xí)慣有助于加速實(shí)現(xiàn)我們的目標(biāo)。
2. was/were doing...when...
(教材P63)In 1980, Benchley was diving when he came across an awful sight.
1980年，本奇利正在潛水，就在這時(shí)他突然看到一個(gè)可怕的景象。
句中的when是并列連詞，意為“就在這/那時(shí)”，相當(dāng)于and then或and at the same time。
when作并列連詞時(shí)常用于以下句型中：
be doing...when... 正在做……這時(shí)……
be about to do...when...＝be on the point of doing... when... 正要做……這時(shí)……
had just done...when... 剛做了……這時(shí)……
①I was thinking of this when I heard my name called.
我正想著這件事，突然聽到有人叫我的名字。
②We __________ (do) our homework when the light went out.
我們正在做家庭作業(yè)，燈突然熄了。
③We were about __________ (set) out when it began to rain.
＝We were on the point of__________ (set) out when it began to rain.
我們正要出發(fā)，這時(shí)天開始下雨。
④I had just gone to bed after a very hard day __________ the phone rang.
在勞累了一天之后，我剛上床睡覺，這時(shí)電話響了。
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