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1、Unit 4 Earthquakes,An earthquake is a shaking of the ground caused by the sudden breaking and shifting of large sections of Earths rocky outer shell.Earthquakes are among the most powerful events on the earth，and their results can be terrifying.A severe earthquake may release energy 10,000 times as
2、great as that of the first atomic bomb.Rock movements during an earthquake can make rivers change their course.Earthquakes can trigger landslides that cause great damage and loss of life.Large earthquakes beneath the ocean can create a series of huge，destructive waves called tsunamis that flood coas
3、ts for many miles.,话题导入,Earthquakes almost never kill people directly.Instead，many deaths and injuries in earthquakes result from falling objects and the collapse of buildings，bridges and other structures.Fire resulting from broken gas or power lines is another major danger during a quake.Spills of
4、hazardous chemicals are also a concern during an earthquake. The force of an earthquake depends on how much rock breaks and how far it shifts.Powerful earthquakes can shake firm ground violently for great distances.During minor earthquakes，the vibration may be no greater than the vibration caused by
5、 a passing truck.,On average，a powerful earthquake occurs less than once every two years.At least 40 moderate earthquakes cause damage somewhere in the world each year.About 40,000 to 50,000 small earthquakeslarge enough to be felt but not damagingoccur annually.,阅读短文，判断正(T)、误(F) 1.All large earthqu
6、akes can cause a series of huge，destructive waves called tsunamis. ( ) 2.Earthquakes can directly make people lose their lives. ( ) 3.The vibration of a minor earthquake may be as small as that caused by a passing truck. ( ) 4.There are earthquakes happening all over the world every year. ( ),答案,T,F
7、,F,T,Period One Warming Up，Pre-reading & Reading,基础自测 自主学习 落实基础知识,课文预读 回归教材 萃取文本主旨,要点探究 探究重点 互动撞击思维,基础自测 自主学习 落实基础知识,1. n. 地震 n. 地震；震动 2. vi. 爆裂；爆发 n. 突然破裂；爆发 3. n. 百万 4. n. 事件；大事 5. n. 废墟；毁灭 vt. 毁灭；使破产,答案,重点单词,earthquake quake burst million event ruin,答案,6. n. 苦难；痛苦 v. 遭受；忍受；经历 7. adj. 极度的 adv. 极度地
8、；非常地 8. vt. 损害；伤害 9. vt. 毁坏；破坏；消灭 10. adj. 无用的；无效的；无益的 adj. 有用的 11. vt. & vi. (使)震惊；震动 n. 休克；震惊；打击 adj. 震惊的,suffering suffer extreme extremely injure destroy useless useful shock shocked,答案,12. vt.& n. 救援；营救 13. vt. 使陷入困境 n. 陷阱；困境 14. n. 灾难；灾祸 15. vt. 埋葬；掩埋；隐藏 16. n. 遮蔽处；避身处；掩蔽 17. n. 标题；头衔；资格 18. n
9、. 记者,rescue trap disaster bury shelter title reporter,答案,1. 立刻；马上 2. 不在意，看轻 3. 仿佛；好像 4. 结束；终结 5. 严重受损；破败不堪 6. 掘出；发现 7. 许多；大量的,重点短语,right away think little of as if at an end in ruins dig out a (great) number of,1.In the farmyards，the chickens and even the pigs were too nervous to eat. 在农家小院里的鸡，甚至猪都害
10、怕得不吃东西。 2.The sound of planes could be heard outside the city of Tangshan even when no planes were in the sky. 即使空中没有飞机，在唐山城外也可以听到飞机声。 3.It seemed as if the world was at an end! 仿佛到了世界末日！ 4.Everywhere 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.All hope was not lost. 并不是所有的希
11、望都破灭了。,好句积累,返回,课文预读 回归教材 萃取文本主旨,1.Before July 28,1976，strange things happened in the countryside of northwest Hebei. ( ) 2.When the earthquake happened in Hebei，onethird of the nation could feel it. ( ) 3.The number of people who were killed or injured reached more than 4,000,000. ( ) 4.Another big
12、quake shook Tangshan while rescue workers and doctors were saving the people trapped. ( ) 5.Animals like cows，pigs and chickens as well as people suffered a lot in the earthquake. ( ),答案,根据课文内容判断正(T)、误(F),T,F,T,F,T,1,2,4,3,5,答案,1.How long did the earthquake last? A.15 minutes. B.42 minutes. C.15 sec
13、onds. D.42 seconds. 答案 C,课文阅读理解,6,答案,2.Which is NOT true according to the passage? A.People in Beijing felt the earthquake. B.People of Tangshan cared much about the strange events before the earthquake. C.If the earthquake had happened during the daytime，it wouldnt have caused so many deaths. D.Man
14、y soldiers helped to rescue the people who were trapped under the ruins. 答案 B,1,2,4,3,5,6,答案,3.Fresh water was taken to the city by train，truck and plane，because . A.the water pipes cracked and burst B.there was no electricity C.dams and wells were useless D.the well walls had deep cracks in them,1,2,4,3,5,C,6,答案,4.Which of the following can also be used as a title of the passage? A.Tangshan Earthquake B.The World at an End C.How to Prevent an Earthquake D.New Tangshan 答案 A,1,2,4,3,5,6,答案,5.What does the last sentence “Slowly，the city began to breathe again.” mean? A.People who were
