课件19张PPT。Unit2 Cloning
Using language
Reading, discussing and writingThe return of the dinosaurs?Let’s enjoy some pictures about dinosaurs. 霸王龙
tyrannosaurus
剑龙stegosaurs
角龙 ceratopsian
雷龙brontosaurus
Look at the title and the picture, guess what the text is about?PredictionThe text can be divided into two parts. What can we learn from them? 1.Why is the film Jurassic Park so popular with people?
2. What does the time table in the middle of the passage tell us? ReadingPart 1Read part one quickly and try to answer the following questions.
People began to clone mice in 1983.
Scientists are still experimenting with cloning mammals because cloning mammals is still a new science.
Dolly the sheep was the first cloned animal.
Read part one and decide whether the
following statements are true or false.
Reading(Part 1)FFTRead part two and try to answer the following questions.
1. What is the author’s opinion about cloning dinosaurs?
2. What are the reasons the author use to support his opinion?
3. What is the conclusion?
Reading(Part 2)1. Why shouldn’t you clone an extinct animal if there isn’t enough diversity in the group?
2. Why is it wrong to clone an extinct animal if it would have to live in a zoo?
Read part 2 again and try to answer the following questions.Because diversity in the group will help cloned animals to resist new illnesses.Because they need suitable habitats to lead a natural life.We can infer from the text that____
A. scientists are experimenting to clone dinosaurs
B. dinosaurs will never return to the earth
C. cloned animals will only live in the zoo
D. the DNA of dinosaurs can only survive 10 000 yearGreat Auk (1844)Aurochs (1627)Dodo bird (1755)Quagga (1883) May the best animal win!
Which extinct animals are worth restoring by means of cloning? Discuss with your partners about the reasons.DiscussionWritingBased on what you have discussed, write a composition giving your reasons to persuade other people.Let’s bring the ________ back to life
__________ is the most suitable animal to
be brought back to life. Here are the
reasons:
Firstly, _____________________________
Secondly, ___________________________
Finally, _____________________________
So I think _____ would be the best
choice to be brought back to life.Sample reportLet’s bring the quagga back to life
The quagga is the most suitable animal to be brought back to life. Here are the reasons:
Firstly, it has beautiful skin as a zebra, so we can use its skin as decoration.
Secondly, the meat is very tasty, and we will have another delicious dish.Finally, it just became extinct in 1883, therefore we can easily get its perfect DNA.
So I think the quagga would be the best choice to be brought back to life.1.Exchange your composition with your desk mates to correct mistakes.
2. Read the text over again to
understand it better.Homework