人教版必修三Unit4 Astronomy:thescienceofthestarsUnit4SectionⅠ.ppt

人教版必修三Unit4 Astronomy:thescienceofthestarsUnit4SectionⅠ.ppt

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Unit 4 Astronomy:the science of the stars;Section Ⅰ Warming Up Reading—Preparing;?Step One:Ask and Discussion 1.Do you know how many planets circle around the sun in our solar system? _____________________________ _____________________________ 答案:Venus(金星);Earth(地球); Mars(火星);Mercury(水星);Jupiter(木星);Saturn(土星);Uranus(天王星);Neptune(海王星);2.Each religion and culture has its own ideas about how life began on earth.What do you know? ________________________ ________________________ ________________________ 答案:In China,we all know that Pangu separates the sky from the earth.In western culture,God created the world in six days.Many scientists believe that the universe began with a huge explosion called the “Big Bang”.;?Step Two:Fast Reading Scan the text and then choose the best answer according to the text. 1.What is the correct order according to the text? ①The clever animals with hands and feet appeared and spread all over the earth. ②The “Big Bang.” ③Small plants began to appear on the surface of the water.;④65 million years ago,the age of the dinosaurs ended. A.②-①-③-④      B.④-③-②-① C.②-④-③-① D.②-③-④-① 答案:D;2.How did the atmosphere on the earth appear? A.It came from space. B.It came from the explosion. C.It came from the oceans. D.It came from the forests. 答案:B;3.In our solar system,why does life only exist on the earth? A.Because it is very warm on the earth. B.Because it is cool enough on the earth. C.Because there is plenty of water on the earth. D.Because it is big enough. 答案:C;4.Why did plants appear earlier than animals? A.Because plants could produce oxygen,which was important for animals. B.Because plants were more advanced than animals. C.Because animals needed more water. D.Because plants needed more water. 答案:A;5.According to the passage we can know ________. A.only the earth has life on it in space B.oxygen in the atmosphere on the earth came from the “Big Bang” C.humans are the cleverest animals of the earth D.plants played an important part in th

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