Unit 6 Survival Developing ideas Plan B- life on Mars ppt课件 新外研版高中英语选择性必修第二册 .pptx

1、Plan B:Life on Mars?How much do you know about Mars?1.Mars is the _ smallest planet in the solar system.a.second b.third c.fourth2.The surface of Mars is covered in _a.rocks b.water c.grass3.The average recorded temperature on Mars is _ a.40 b.2 c.-63 4.One day on Mars is about _ longa.18 hours b.24

2、 hours c.37 hours1.The title Plan B:Life on Mars means _ to Marsone day will be human beings _ choice for survival.2.Choose the magazine in which you would most likely find the passage and give your reasons.a.The Traveller b.All About Space c.Environmental Concerns d.Biology for Fun3.The passage aim

3、s to raise public awareness of _ _ by pointing out the _ possibility of our moving to Mars in the future.environmentalprotectionmovingsecondtinyPlan B:Life on Mars?ReasonsExplorationChallengesFuturePara 12Para 3Para 4Para 5Match the main ideas with the paragraphsRead para 1 and complete the chartThe

4、 fear of human beingsIn the 1960s and 1970sTodayWhat is itWhy is itWhat do humans doN/AIn the 1960s and 1970sTodayThe human race,and possibly all advanced life forms on the planet,could be _,just _wiped outat the push of a buttonNuclear missilesenvironmental problems_ scenes in films happen is real

5、life.terrifyingNuclear missilesEnvironmental problemsWhat do these two fears have in common?human race_ and other life forms would be destroyed What do humans do now?1.Think of ways to _ this risk2._ for the worstlowerPrepareWhy is Mars our Plan B?Relatively close to EarthLess hostile environmentTod

6、ay our interest in Martian exploration is greater than ever beforeHow do human beings explore the Mars?_ spacecraftProbes _the planet send back valuable _ and _ images Robots have explored the Martian _,testing the _and searching for _,water and _unmannedorbitingdatastunningsurfacesoilresourcessigns

7、 of lifePlan _ missions to Mars within the next 25 yearsmannedWhat are the challenges of moving to Mars560 million 0.32 billion(km)solar radiation1 Sending people there will require all the skill,courage and intelligence of the human race.2 It would take months to reach Mars,travelling through dange

8、rous solar radiation.(The Moon can be reached within days).3 Even if the first settlers do reach Mars safely,they may not be able to return to Earth-ever.4 Staying alive will be a daily challenge,but not impossible.What is the Biosphere 2 experiment?As early as 1980s,scientists were building Biosphe

9、re 2 in the Arizona desert.It consisted of a closed space in which people,animals and plants could live together.The“closed“concept meant that the space was designed to function with its own oxygen,food and water,needing nothing from the outside world.What did the Biosphere 2 experiment achieve?Alth

10、ough,the two-year experiment was not a success.It did provide us with a better understanding of how humans might be able to live on another planet.More recently,scientists have succeeded in growing a variety of plants in an environment similar to that on Mars,which definitely is a big step forward.W

11、hat should human beings do in the near future?For now,human settlement of Mars is still decades away.In the meantime,scientific research shows that the planet Earth is getting warmer.This change is being caused by human activity and is having a terrible effect on the biosphere.Until we are finally a

12、ble to live on another planet,we need to take much better care of our own.Right now,its the only one we have!1.Humans have yet not visited Mars.2.People want to go to Mars on holiday.3.There are plants growing on Mars.4.The greatest to life on Earth used to be nuclear missiles.5.One day,humans will

13、have to go and live on another planet.6.Our Plan A includes developing renewable energy resources.7.The Biosphere 2 experiment ended in failure.Choose the statements that can be inferred from the passage.Sometimes,we need to form opinions and draw conclusions that are not directly stated within the

14、given information.For example,from the sentence“While the Moon can be reached within days,it would take months to reach Mars,travelling through dangerous solar radiation”,we can infer that the Moon is less exposed to dangerous radiation than Mars.Headings and pictures can also help us make educated guesses about a textLearning to learnThink and share Can you think of a“Plan C”to save people from the problems on Earth?Share it with the class