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2,正文级别 3,正文级别 4,正文级别 5,标题文本,正文级别 1文级别 2,正文级别 3,正文级别 4,正文级别 5,标题文本,正文级别 1文级别 2,正文级别 3,正文级别 4,正文级别 5,标题文本,正文级别 1文级别 2,正文级别 3,正文级别 4,正文级别 5,标题文本,正文级别 1文级别 2,正文级别 3,正文级别 4,正文级别 5,标题文本,正文级别 1文级别 2,正文级别 3,正文级别 4,正文级别 5,标题文本,正文级别 1文级别 2,正文级别 3,正文级别 4,正文级别 5,标题文本,正文级别 1文级别 2,正文级别 3,正文级别 4,正文级别 5,标题文本,选择性必修二,Unit 6 Survival(3),高二年级 英语,选择性必修二,1,Developing ideas,Plan B:Life on Mars?,Reading,Developing ideas,2,Objectives,At the end of the class,you will be able to:,1.find out the reasons for humans to live on Mars,2.make correct inferences and get the evidences,3.retell the passage simply,4.share opinions about Mars after learning the passage,Objectives At the end of the c,3,Lead-in,Talk about something about Mars.,Mars is slightly more than half the size of Earth,with corresponding lower gravity.The atmosphere there is really thin,100 times thinner than on Earth and its not breathable.Its 96 percent carbon dioxide.Its really cold there and there is quite a range of temperature.A day on Mars is about as long as a day on Earth,plus about 39 minutes.,Lead-in Talk about something a,4,Lead-in,Talk about something about Mars.,Seasons and years are twice as long as they are on,Earth.Since the 1960s,Mars has been the subject of several unmanned exploration missions.However,many,of early missions failed.Mars is a long way away,1000 times farther away from us than the moon.,Lead-in Talk about something a,5,Lead-in,Complete the quiz about Mars.,1)Mars is the _ smallest planet in solar system.,a.second b.third c.fourth,2)The surface of Mars is covered in _.,a.rocks b.water c.grass,Lead-in Complete the quiz abou,6,Lead-in,3)The average recorded temperature on Mars is_.,a.40 b.2 c.-63,4)One day on Mars is about,_ long.,a.18 hours b.24 hours c.37 hours,Lead-in 3)The average recorde,7,Predicting,Predict the main idea according to,the title and the pictures,.,PredictingPredict the main ide,8,Reading for general idea,Read the passage to answer the questions.,1.Why do people make Plan B?,2.What is Plan B?,3.Is it easy for us to live on Mars?,4.What should we do now?,Reading for general ideaRead t,9,Checking the answers,1.Why do people make Plan B?,2.What is Plan B?,Environmental problems have taken over as the greatest risk to life on Earth(paragraph 1).,One option is to explore other planets to see if we could live on them.The most likely choice is Mars(paragraph 2).,Checking the answers1.Why do,10,Checking the answers,3.Is it easy for us to live on Mars?,It is not easy because it would take months to reach Mars,travelling through dangerous solar radiation.Even if the first settlers do reach Mars safely,they may not be able to return to Earth.Staying alive will be a daily challenge(paragraph 4).,Checking the answers3.Is it e,11,Checking the answers,4.What should we do now?,We need to take much better care of our own planet until we are finally able to live on another planet(paragraph 5).,Checking the answers4.What sh,12,Summary,From the prediction and the information above,we know that Plan B is,to explore Mars to see if we might live on it one day,.,SummaryFrom the prediction and,13,Reading for specific information,Read to find out the detailed information about the reasons why people might live on Mars.,Reading for specific informati,14,Reading for specific information,1.Mars is relatively close to Earth.,2.Mars has an environment less hostile than that of other planets,.,The possible answers,:,Reading for specific informati,15,Reading for specific information,3.Our interest in Martian exploration is greater than before.,4.Since 1960s,we have been sending unmanned spacecraft to Mars.Our probes have orbited the planet,sending back valuable data and stunning images.Our robots have explored the Martian surface,testing the soil and searching for resources,water and signs of life.,Reading for specific informati,16,Reading for specific information,5.Encouraged by discoveries over the years,space agencies of various countries are planning manned missions to Mars
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