课件16张PPT。height:6 m
length:12-15 m
weight:10 tons
Giant ,small or tiny?
Can it run? swiftly or slowly? Dull?
Can it swim or fly?TyrannosaurusMosasauruslength:21 m
weight:33 tons
Other characteristics:
fierce and?meet-eating animals
With sharp teethPterosaurialength:8.2 m
weight:15 kg
Other characteristics:
fierce and?meet-eating animals
No teeth
High speed but cannot deal with huge animals because of its weightHow did scientists bring them back to life?CLONINGDo you think it possible for people to clone a dinosaur? The Return of Dinosaurs?1. What’s the main idea of each paragraph?A. explain the impossibility of cloning dinosaurs B. conclude that it’s just a dreamC. introduce the topic of the passage
TIPSPara 1: ____ Para 2: ____ Para 3: ____CBAB True or FalseTo be exact, the history of cloning mammals is over 100 years. ( )
The idea that scientists may clone dinosaurs that died out make people frightened but exited. ( )
F T DEVELOPMENT
It is impossible or
1.
to bring extinct animals back to life through cloning.REASONunsuitableDNAillnesseszoonaturalWhat is the writer’s attitude
towards cloning the dinosaurs?
A. Supportive B. objective
C. Negative D. SubjectiveOther words describing attitudes:
supportive 支持的
neutral 中立的
negative 消极的
subjective 主观的
opposed 反对的
objective 客观的
positive 肯定的
sympathetic 同情的
optimistic 乐观的
pessimistic 悲观的
critical 持批评态度的
cautious 谨慎的 B Summarize the passage by filling in the blanks. The __________ (possible) of cloning fierce and extinct wild animals has always excited people. Scientists are still experimenting with cloning animals. This is ________ the cloning of mammals is still a new science.
Occasionally people suggest that dinosaurs can possibly __________ (restore). Unfortunately, with ______ we know now, this is either impossible or _________(suit). There are many reasons. possibilitybecausebe restoredwhatunsuitable Firstly, the initial requirement is that you need perfect DNA. Secondly, all efforts will be ____ vain if there is not enough genetic variation (变异) to resist new _______ (ill). Thirdly, a suitable habitat would be needed for them to live in a _______ (nature) environment.
_______ (basic) on what we know now, we cannot clone animals that have been extinct longer than 10,000 years ago. So the chance of dinosaurs _________ (return) to the earth is merely a dream. (121 words)inillnessesnaturalBasedreturningGreat Auk (1844)Aurochs (1627)Dodo bird (1755)Quagga (1883)Discussion
Which one is the most suitable to bring back? Let’s bring ______ back to life
______ is the most suitable animal to bring to life. Here are the reasons:
Firstly, _____________________________.
Secondly, ___________________________.
Thirdly, ____________________________.
So I think _________ would be the best choice to be brought back to life both for pleasure and for food. Writing Sample writing Let’s bring the dodo back to life
The dodo is the most suitable animal to be brought to life. Here are the reasons:
Firstly, it’s friendly and not aggressive, so it can be kept as a pet for children. Secondly, its large eggs and tasty meat can be served as food. Thirdly, farmers can sell its feathers as decoration.
So I think the dodo would be the best choice to be brought back to life.