Unit4_earthquake

unit4 Earthquake(知识点)Unit 4: EarthquakesIntroduction:Earthquakes are natural disasters that occur when there is a sudden release of energy in the Earth's crust, causing the ground to shake. They can cause widespread destruction and lead to loss of life. In this unit, we will explore various aspects of earthquakes, including their causes, effects, and ways to mitigate their impact.I. What Causes Earthquakes?Earthquakes can be triggered by several factors, but the majority of them occur due to the movement of tectonic plates. As the Earth's crust consists of several large plates that float on the semi-fluid asthenosphere, their constant motion can create stress and tension. When the stress becomes too high, it is released in the form of seismic waves, causing an earthquake.II. Types of Earthquakes:1. Tectonic Earthquakes:- These are the most common type of earthquakes and occur at plate boundaries.- There are three main types of plate boundaries: divergent, convergent, and transform.- Divergent boundaries occur where plates move apart, while convergent boundaries occur where plates collide. Transform boundaries occur where plates slide past each other horizontally.- The intensity and magnitude of tectonic earthquakes vary depending on factors such as the type of boundary and the amount of accumulated stress.2. Volcanic Earthquakes:- Volcanic activity can also lead to earthquakes.- When magma rises to the surface, it can cause the surrounding rocks to crack, resulting in volcanic earthquakes.- These earthquakes are usually localized around the volcano and are associated with volcanic eruptions.3. Induced Earthquakes:- Human activities can sometimes trigger earthquakes.- Activities such as mining, reservoir-induced seismicity (due to filling of large reservoirs), and hydraulic fracturing (fracking) can induce seismic events.- Induced earthquakes may occur in areas where the Earth's crust is already under stress.III. Earthquake Effects:1. Surface Effects:- Shaking of the ground during an earthquake can cause various surface effects.- Buildings and infrastructure may collapse or suffer severe damage, leading to injuries and loss of life.- Landslides, ground cracks, and changes in the landscape can also occur.2. Secondary Effects:- Earthquakes can trigger secondary effects such as tsunamis, which are large ocean waves generated by the displacement of water.- Fires may break out due to damaged electrical systems or ruptured gas pipelines.- The movement of the ground can also lead to liquefaction, where saturated soil temporarily loses its strength and behaves like a liquid.IV. Mitigating Earthquake Impact:1. Preparedness:- Education and public awareness are crucial for earthquake preparedness.- Communities should have disaster response plans, evacuation routes, and emergency supplies in place.- Conducting regular drills and training sessions can help people understand the appropriate actions to take during an earthquake.2. Building Design:- Constructing buildings and infrastructure that can withstand seismic forces is essential.- Engineers use various techniques, such as base isolation and dampers, to reduce the impact of earthquakes on structures.- Building codes and regulations should be followed to ensure safety standards are met.3. Early Warning Systems:- Advances in technology have made it possible to develop early warning systems for earthquakes.- These systems can detect initial seismic waves and provide a few seconds to minutes of warning before the more destructive waves arrive.- Early warning can help prompt evacuations and give people time to take cover.Conclusion:Earthquakes are powerful natural phenomena that can have devastating consequences. By understanding their causes, effects, and implementing effective mitigation strategies, we can work towards minimizing the impact of earthquakes and protecting lives and infrastructure. Increased public awareness and preparedness are vital in ensuring resilience against these unpredictable yet recurring events.。

必修一Unit 4 Earthquake Section A&B&C11.burst➢v.(使)爆裂；(使)膨胀；爆发；burst-burst-burstThe water pipe cracked and burst.➢n.突发，爆发✶There was a burst of laughter in the next room.隔壁房间里突然爆发出一阵笑声。

➢v.猛冲；突然出现✶He burst into the room without knocking.他没敲门就闯进了房间。

【拓展】●burst into+名词=burst out doing 突然...起来✶burst into tears=burst out crying 突然哭起来/ burst into laughter=burst out laughing突然笑起来●burst in闯进●be bursting with充满；爆满✶The roads are bursting with cars.车辆把那些道路挤满了。

● a burst of (突然)一阵lion百万【用法】one million一百万several million几百万a dozen million一千两百万millions of+名词几百万...【其他数字用法】tens of thousands of...数以万计的...hundreds of thousands of...几十万【其他表示数字的词】dozen一打(十二) score(二十)13.event n.(1)事件；(尤指)大事●current/the latest events当前事件/最新事件(2)(体育比赛等的)项目，赛事●one of the major sporting events of the year年度重大体育赛事之一【辨析】event 重要事件；比赛项目The Asian Games were one of the major sporting eventsof the year.亚运会是年度重大体育赛事之一。

Unit 4 Earthquakes【重点词汇】1 ruinn．毁灭；毁坏；崩溃；(不可数名词)废墟；遗迹(常用复数vt．&vi．(使)毁坏；毁灭；成为废墟；使破产①The castle has fallen into rain．那城堡已破败不堪。

②An earthquake left the whole town in ruins．那次地震过后，全城到处是残垣断壁。

…③It poured with rain and my dress got/was mined．大雨倾盆，我的连衣裙已淋得不成样子了。

归纳拓展fall into ruin崩塌come/go to ruin毁灭，崩溃lie in ruins成为废墟the ruins of Yuanmingyuan圆明园遗迹bring sb.to ruin使某人破产ruin one‟s hopes使某人希望破灭ruin oneself自取灭亡ruin one‟s health/fame毁坏某人的健康/名誉辨析活用damage/destroy/ruin/spoil这四个词都有“损坏，破坏”之意，具体区别如下：(1)ruin指彻底摧毁一件事物，特别是摧毁美好、珍贵的事物，并使其无法修复，其主语多为天灾人祸等无形的力量。

有时可用于借喻中，泛指一般的“弄坏了”。

He has ruined his health through drinking.他饮酒过度，把身体搞坏了。

(2)damage指“损坏”，表示不彻底的破坏，一般是部分性的，只是使其不能发挥正常作用，意味损坏后价值或效率降低，宾语一般是物。

I damaged my shoes in football practice today.今天练习踢足球时我把鞋弄坏了。

(3)destroy指十分彻底的“破坏”，常含有不能或很难修复的意思，也可以用作比喻意义，指希望、梦想等的破灭；主语可以是人，也可以是物；后接人或物都可以。

Unit4 Earthquake一：重点单词短语1.Now imagine there has been a big earthquake. 现在，假设有一次大地震。

(1)sth. happen to. sb.某事发生在某人身上Did you hear what happened to David last night? 你听说大卫昨天晚上发生什么事了吗?(2)happen to do sth.碰巧做某事I happened to see Peter on the way to the bookstore yesterday.昨天我去书店的路上碰巧遇见了彼得。

(3)It (so) happened that…碰巧......It so happened that I saw Peter on the way to the bookstore yesterday.昨天我去书店的路上碰巧遇见了彼得。

2. Imagine your home begins to shake and you must leave it right away.shake(v.) (shook, shaken)摇动，震动eg: Shake the bottle before taking the medicine. 服药之前将药瓶摇一摇。

使受震撼；使（信念等）动摇eg: They were badly shaken by the news of her death. 她死的消息令他们大为震惊。

（指人）打颤，颤抖eg: She was shaking with cold/laughter/fear/anger.shake(n.) (C 常用单数）摇动，震动eg: a shake of the head 摇头拓展：shake hands with sb. = shake sb. by the hand = shake sb's hand 与某人握手shake one's head 摇头3. For three days the water in the village rose and fell, rose and fell.rise(vi.) “升起，升高”，其后不能接宾语，不能用于被动语态。

Unit 4 Earthquake地震基础、知能、回扣Ⅰ.核心词汇1.__________(vi) 爆裂；爆发；(n.).突然破裂；报发2.__________废墟；毁灭；（vt.）毁灭；使破产3.___________(adj.)极度的4._________(vt) 破坏；毁坏；消灭5.____________ (vt﹠vi)（使）震惊；震动；(n.)休克；打击；震惊6. (n﹠vt.)_________援救；营救7._________(vt.) 使陷入困境；（n.）陷阱；困境8.__________(vt.) 埋葬；掩埋；隐藏9.___________(n.) 掩蔽；掩蔽处；避身处10.___________(n.﹠vt) 损失；损害11.__________(n.) 裁判员；法官(vt.)断定；判断；判决12.__________(vt.) 损害；伤害→_________adj.）→_______________ (n.)13._____________(adj.)无用的；无效的→_________（反义词）→__________(v.﹠n.)14._________(n.) 电；电流；电学→_________ (adj.)用电的；带电的→_________(adj.) 与电有关的；电学的15.__________(vt.) 使惊吓；吓唬受惊的；→_________(adj.)受恐吓的；→_________(adj.)令人恐惧的16.___________(vt.) 表达；表示；(n.)快车；速递→__________(n.)表达；表示Ⅱ.高频短语1._____________ 立刻；马上2.____________ 好像；仿佛3.______________ 结束；终结4._______________ 严重受损；破败不堪5._____________ 掘出；发现6.___________ 许多；大量的7._____________ 刮走8.______________ 代替；而不是9.__________ 陷入10.___________ 埋头于Ⅲ.重点句式1.__________________the world was at an end!仿佛到了世界末日!2. Thousand of families were killed and many children _______________.成千上万的家庭被毁,许多孩子成了孤儿.3. ________________________people who were killed or injured reached more than 400,000.死伤人数达到了40多万.4. __________ they looked nearly everything was destroyed.人们无论朝哪里看,哪里的一切都几乎被毁了.5. ________ hope was ________lost.不是所有的希望都破灭了.6. The army organized teams to ___________ were trapped and to bury ____________.解放军组成小分队,将受困的人们挖出来,将死者埋葬.答案:Ⅰ.1. burst 2. ruin 3. extreme 4. destroy 5. shock 6. rescue 7. trap 8. bury 9. shelter 10. damage 11. judge12. injure injured ;injury 13. useless; useful; use 14. electricity ; electric ; electrical 15. frighten; frightened ;frightening 16. express; expressionⅡ. 1. right away 2. as if 3. at an end 4. in ruins 5. dig out 6. a (great) number of 7. blow away 8. instead of9. be trapped in 10. be buried inⅢ.1. It seemed as if 2. were left without parents 3. The number of 4. Everywhere 5. All ;not 6. dig out those who; the dead重点．难点．突破Scarcely had she heard the news about the death of Michael Jackson when she burst out crying.她一听到迈克尔·杰克逊死亡的消息，就失声痛哭起来。

英语必修一Unit 4 Earthquakes词汇句子解析Unit 4 Earthquakes词汇讲解是整理的，旨在提供综合运用所需材料，希望能够帮到你!重视衔接,做好过渡高一新学期伊始!Unit 4 EarthquakesWord usage1. shake 1)v. (shook, shaken)to (cause to) move up and down or from side to side with quick short movements. 2) n. [C usually sing.] an act of shakingThe house shook when the earthquake started.Shake the bottle before taking the medicine.He came forward and shook me by the hand. =He came forward and shook hands with me.He was shaking with anger.She answered “no” with a shake of the head.2. rise 1) vi. (rose, risen) to move from a lower to a higher level or position; go up 2) n. [C (in)] an increase in quantity, price, demand etc.The sun has not yet risen.The population of the city has risen to five million.He rose and left the room.There will be a rise in unemployment next year.Theres been a sharp rise in the cost of living.2. pond n. an area of still water smaller than a lake, especially one that has been artificially madeSome cattle were drinking at the pond.There are some fish living in the pond.When an earthquake is coming, fish will jump out of ponds.3. burst 1) v. to (cause to ) break open or break apart suddenly and violently, usually as a result of pressure from within and often cause the contents to become widely scattered.2) n. an act of result of bursting; (of) a sudden short period of great activity, loud noise, strong feeling; outbreakThe balloon burst.After ten days of rain the river burst its banks.A burst of hand-clapping followed the ending of the song.4. canal n. an artificial stretch of water dug in the ground to allow ships or boats to travel alongit, or to bring water to or remove water from an areaCoal used to be sent here by canal.Canals have been built to irrigate the desert.The Panama Canal joins two oceans.5. steam n. [U] 1) water in the state gas produced by boiling2) power or effort produced by steam under pressure, and used for making things work or moveWho invented the steam engine?Steam was used to be the power of a train.There is steam bursting from that hole.6. ruin 1. n. a) [U] the cause or state of destruction and decayb) [C] a building that has been badly damaged or destroyed2. vt. a) to spoil or completely destroy a person or thingb) to cause someone to loss all their moneyThe temple has fallen into ruin.We visited the ruins of the temple.The heavy rain ruined our holiday.The hurricane ruined all the houses here.The flood ruined the crops.If I lose my lawsuit(官司), the cost will ruin me.7. injure vt. to cause physical harm to (a person or animal), especially in an accident; hurt seriously; to damageI hope I didnt injure her feelings.His back was injured.Two people were killed and seven were injured.His reputation will be badly injured by the vicious rumour.8. destroy vt. to damage sth so severely that it can not be repaired; put an end to the existence of; ruinA fire destroyed the house.What he said destroyed our last hope.All hopes of peaceful settlement were destroyed by his speech.9. brick n. [C,U] 1) a hard piece of baked clay used for building2) sth. in the shape of a brickThey used yellow bricks to build the house.The tower is made of bricks.Bricks covered the ground like red autumn leaves.10. useless adj. not of any useThis knife is so blunt. Its useless.I realized it was useless to reason with him.I was useless at maths. = My maths is very poor.11. shock 1) n. a) [C, U] a violent force from sth such as explosion,a crash or a hard blowb) [C, U] the feeling you get after sth unexpected and usually very unpleasant has suddenly happened, or you have received an unexpected piece of newsc) the poor medical condition of someone who has an accident and whose heart and lungs are not working properly2) v. to make someone feel very upset, angry, or unpleasantEarthquake shocks are often felt in Japan.The news of his death was a shock to us.The traffic accident sent him into a state of shock.They were shocked by her rudeness.We were shocked by his sudden death.12. rescue v. to save someone or sth from harm or dangerHe rescued three children from the burning building.The life boat was sent out to rescue the sailors from the sinking ship.The boy was rescued after hours at sea.13. disaster n. [C,U] a sudden event causes great loss or harmWe were all shocked by the disaster.The earthquake is one of the worst natural disasters the country has ever suffered. People began to wonder how long the disaster would last.14. organize v. to plan and arrange an event; to arrange things ina sensible orderWell organize an oral English contest.The story is very well organized.They organized the truckers into a union.15. shelter 1) n. a) [U] protection, especially from bad weather or danger b) a building that protects you from weather or danger.2) vt. to protect someone or sth from bad weather or danger;vi. to stay in a place in order to be protected from bad weather or dangerThe umbrella is a poor shelter from heavy rain.Their immediate need is for food, clothing and shelter.The wall sheltered us from the wind.She was accused of sheltering a murderer.She wad sheltered by the USA.In the rain people were sheltering in the doorways of shops.16. fresh adj. 1) new and different (only before a noun ); 2) recently picked, caught, produced and therefore in good condition (used of food);3) clean, cool and pleasantThey buy fresh meat.This kind of fish lives in fresh water.She is fresh from university.She is quite fresh to office work.17. percent n. parts for each 100The bank has increased its interest rate by one percent.Over ninety percent of the islanders here are illiterate.He spends a large percent of his income on food and drink.18. speech n. 1) [C] a formal talk to a group of listeners2) [U] the ability to speak or the act of speaking3) [U] way of speakingThe chairman made an opening speech.She is researching speech development in children.We express our thoughts by speech.By your speech I can tell youre from Hong Kong.19. judge 1) vi. vt. to decide who or what is the winner in a competition2) [vt. + that] to form or give an opinion about someone or sth after careful thoughtjudging from, judging by…3) n. a public official who has the power to decide questions brought before a court of law; a person who has the knowledge and experience to give an opinion about the value of sthYou cant judge a book by its cover.He is going to judge the first race.We must judge whether he is guilty.The prisoner was taken before the judge.He was one of the judges at the horse race.20. honour 1) n. a) [U] great respect and admirationb) [sing] sth that brings great respect and pride2) v. to show respect to sb. or to praise sb. publiclyWe fight for the honor of our country.He is an honor to our school.Children should be taught to show honor to their elders.He honors his teachers.20. prepare 1) vt. to make sth. ready for a future event or action 2) vi. to get ready to do sth.They prepared themselves for the worst.When we arrived home, mother had already prepared dinner for us.I was preparing for bed when I heard a knock at the door.Useful expressions1. right awayat once ; in no time; immediatelyI will return the book right away.I am getting in touch with him right away.We are about to start right away.2. end1) at an endfinish; overIt seems that the world was at en end.2) bring… to an end =put an end to…I wonder how I can bring the dispute to an end.=I wonder how I can put an end to the dispute.3) come to an endThe meeting came to an end at midnight.4) at the end of…At the end of the road there is a shop.5) by the end of…How many English words have you learned by the end of last term?6) in the end =at last; finallyHe will be a scientist in the end.3. dig out1) to get sth out of a place, using a spade or your hands2) to find sth you have not seen for a long time, or that is not easy to findLets dig out the roots.Why did you dig out all those old magazines?We must dig the truth out of him.1. a (good \ great \ large) number of+ n.(pl.)many; a large quantity of; a lot ofA good number of students are not interested in modern art.Ive seen the film a number of times.The Great Wall attracts a great number of foreign tourists every day.the number of…The number of private colleges has increased.= Private colleges have increased in number.5.give out1) to give sth to a number of different people, especially to give information to people2) to produce light, heat, a sound, a gas, smell etcYou have no right to give my telephone number out.Students were giving out leaflets(传单)to everyone on the street.The teacher gave out the examination papers.The radiator (散热器) is giving out a lot of heat.与give有关的常用短语还有：give away 送掉，捐赠give in 让步，屈服give off 发出(气味、光、热、声音等)，此时相当于give outgive up放弃give back 归还6.thousands of基数词+s，并不表示确切的具体数字，可以单独使用，也可以先接介词of 再接复数名词。