高中英语必修三教学课件：Unit-4-Astronomy--the-science-of-the-stars-HOW-LLIFE-BEGAN-ON-THE-EARTH.ppt

1、M3U4 HOW LIFE BEGAN ON THE EARTHthe solar system1111On which planet are there On which planet are there lives at present?lives at present?EarthHow did life begin on the earth?How did life begin on the earth?Guessing words:please guess the words or expressionsaccording to the pictures Big Bang forest

2、s small plants dinasors amphibians land plantsmammalsa solid globeclever animals with hands and feet fishinsectsshellfishAfter watching it,please work in pairs to number the pictures on the handout according to the order they appear in the video.(1 )Big Bang()forests()small plants()water()dinosaurs(

3、)insects and amphibians()land plants()mammals()a solid globe()clever animals with hands and feet()a cloud of dust()shellfish and fish1 After watching it,please number the pictures on the handout according to the order they appear in the video.(1 )Big Bang()forests()small plants()water()dinosaurs()in

4、sects and amphibians()land plants()mammals()a solid globe()clever animals with hands and feet()a cloud of dust()shellfish and fish112111098765432 Goals:To understand better the theory about the origin of the universe and the development of life on the earth the“Big Bang”theory.To dub(给给配音配音)the vide

5、o on the development of life on the earth.Task 1:Whats the writing style of the text?A.Narrative 记叙文B.Explanation 说明文C.Essay 散文111111111111111111111111111Please take a quick look at the text,and do the two tasks:Task2:How do you divide the text into two parts?the formation of the earththe developmen

6、t of life(Para 1,2,3)(Para 4,5)：Read Part 1 and make choices 1.What formed the earths atmosphere?A.Carbon dioxide,oxygen.B.Carbon dioxide,oxygen,poisonous gas.C：Water vapour,carbon dioxide,oxygen,nitrogen.D：Water vapour,carbon dioxide,oxygen,nitrogen and other gases.2:Why was the earth different fro

7、m other plants?A:It produced a lot of heat.B:Water remained on the surface of the earth.C:Water disappeared.D:It was the oldest planets.Read Part 2 and make choices3:Why was it necessary for plants to grow before animals.A:Animals need plants to protect them form the sun.B:Plants provided oxygen for

8、 animals to breathe.C:Animals could hide from hunters in forests.D:It was easier for plants to grow.4:What problem is caused by human beings?A:They exist everywhere on the plants.B:They cause global warmingC:They find new methods of growing crops.D:They enjoy hunting and fishing.Work in groups to pr

9、esent dubbing Task 1:Use the sentences in the text to describe the snapshots from the video we watched at the beginning Task 2:Work in groups to put a sound track into the video dubbing.(Group work)Described the video 1.Big Bang9.forests 5.small plants4.water 9.dinosaurs8.insects and amphibians7.lan

10、d plants10.mammals 3.a solid globe 11.clever animals with hands and feet2.a cloud of dust 6.shellfish and fish 1.Surf the Internet and do a research on the stories at home and abroad about how life began on the earth.2.Polish your language of the script for the video.3.Record the script and reedit the video with the sound track to make a new video file.