课件22张PPT。Unit 14 Dinosaurs’ DeathsReading and writing1. What is it?
2. Does it still live on the earth?Discuss:dinosaurThey are dead and extinct.Jurassic Park Who is the king of dinosaurs?The Tyrannosaurus RexReading (1): Reading the text quickly and answer the questions.1. What kind of animal is talked about in the passage?
2. Is it still alive on the earth?Dinosaur Dinosaurs are extinct nowadays. Reading (2): Answer the questions.When did the large object hit the earth?
What happened after it hit?
What was the scientific theory about dinosaurs’ extinction twenty years ago?Sixty-five million years ago.Dinosaurs living on the ground became extinct.They discovered that a large cloud of dust was created by the crash of the large object. They reasoned that sunlight was stopped from reaching the earth by the cloud. As a result, the weather became greatly cooled. The cold weather and less sunshine killed many plants which were the food of dinosaurs and other animals. Because of no food the animals soon died.What was the new theory expressed by some scientists ten years ago?
5. What are scientists preparing to do?They said that the object was not big enough to create a deadly cloud of dust, but it hit with great force so that poisonous chemicals were given out. Dinosaurs and other ancient animals were poisoned by the chemicals and then died.Scientists are preparing to make a study of the rocks that remain after the large object hit.Reading (2): Answer the questions.Learn some language points in the text.extinct adj. 灭绝的，绝种的；如：
Dinosaurs have been extinct for millions of years.
恐龙已经灭绝数百万年了。
wonder about 对某物发表惊讶，不敢相信；如：
Sometimes I wondered about his behavior.
有时我对他的行为感到惊讶。
prove to be 证明是；prove that 证明Learn some language points in the text.relation n. 关系，联系
have a relation with 和……有关系
lead to 导致
discover v. 发现
Police discovered that Kim is the thief.
警察发现金就是小偷。
dust n. 尘土，尘埃Learn some language points in the text.crash n. 碰撞；撞击
stop sb. from doing sth. 阻止某人做某事；如：
My father stopped me from going outside at night.
我父亲晚上不让我出门。
theory n. 理论，推测
raise a theory 提出一种理论Learn some language points in the text.hit v. 打，碰撞，击中；如：
The stone hit the window. 石头击中了窗户。
force n. 力量；如：
do sth. with great force 用力做某事
chemical n. & adj. 化学品，化学的
reaction n. 反应；如：
chemical reaction 化学反应Study the following expressions and try to make another one.successWine is the cause of the accident.
Pride is the cause of failure.
Diligence is the cause of success.the planStudy the following expressions and try to make another one.He is still working on the report.
He spent something working on the plan.failureStudy the following expressions and try to make another one.Having too much wine will lead to an accident.
Hard work leads to success.
Too much pride leads to failure.his lost bikeStudy the following expressions and try to make another one.I discovered his lost bike.
Scientists discovered the truth.
They want to discover the reason of dinosaur’s death.Fill in the blanks with the correct forms of the words in the box.poison cause create reason
discover fall influence lead toA large object ______ from space sixty-five million years ago.
It was __________ twenty years ago that the large object ________ a large cloud of dust which _________ the extinction of the dinosaurs. But later some scientists thought the object was not big enough to create a cloud of dust which ___________ the death of the creatures.
Scientists _________ that pollution caused by the chemicals might have _________ the environment to such a degree that dinosaurs and other ancient animals were _________.felldiscoveredcreatedcausedreasonedinfluencedpoisonedleaded toWrite: Discuss with your partner on the cause of the extinction of dinosaurs. Then complete the dialogue.A: Do you know when dinosaurs became extinct?
B: It is said___________________________________________
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A: What was the cause?
B: It is believed that_____________________________
____________________________________________________________________________________________ that sixty-five millions years ago, a large object fell down from space on the ground where dinosaurs were living. food of dinosaurs were killed with the lack of sunlight and the cold weather so that dinosaurs died.A: How did the large object cause the extinction?
B: Twenty years ago some scientists said__________________
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____________________________________. But ten years ago, it was reported_______________________________________
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____________________________________________________Write: Discuss with your partner on the cause of the extinction of dinosaurs. Then complete the dialogue. the huge object hit with great force so that poisonous chemicals were given out. a large cloud of dust was created by the crash of the large object.HomeworkRevise what we have learned in this part.
