Unit Unit Unit Unit 4 Life4 Life4 Life4 Life on Mars on Mars on Mars on MarsTaskTaskTaskTaskFacts about MarsImagination about life on MarsWarming-upLearn about MarsGravity Environment Air Distance The gravity on Mars is only about three-eighths of that on the Earth.Mars has an environment similar to that of the Earth.Mars has much thinner air than that on the Earth.It takes months to fly to Mars.Facts we have learnt about MarsPre-writing1.What does Mars look like?A.A green ball.B.A black ball.C.A red ball.2.How about the conditions on Mars?A.Comfortable.B.Hard.C.Pleasant.3.How many days are there in a year on Mars?A.365 Earth days.B.687 Earth days.C.400 Earth days.More facts about MarsPre-writing4.How many moons(卫星)does Mars have?A.One.B.Two.C.Three.5.What is the surface of Mars like?A.The surface of Mars is like that of the Earth.B.Its quite different from that of the Earth.C.It is unknown to us.Phobos 火卫一Deimos 火卫二Pre-writingTalk about different aspects of life on MarsPre-writingSome people believe that humans could live on the planet Mars by the year 2100.Our own planet,the Earth,is becoming more and more crowded and polluted because of the rapid increase in population.It is hoped that people could start 5 all over again and build a better world on Mars.Here is what life there could be like.At present,our spacecraft are too slow to carry large numbers of passengers to Marsit would take months.With the development of technology,by the year 2100,the journey might only take about 20 minutes in spacecraft that travel at the speed of light!However,the spacecraft would travel so fast that the journey to Mars might be quite uncomfortable.Many people would feel ill.Humans cannot survive without water,oxygen or food.So far,nobody knows whether there Gravity could be another problem.The gravity on Mars is only about three-eighths of that on the Earth.People would have to wear boots that are specially designed to prevent themselves from floating off into space.Gravity could be another problem.The gravity on Mars is only about three-eighths of that on the Earth.People would have to wear boots that are specially designed to prevent themselves from floating off into space.Compared with life on the Earth,life on Mars would be better in some ways.People would have more space.They might live in houses with huge comfortable rooms.Also,robots would do most of their work so that they could have more time to relax.There would probably be no schools on Mars.Every student would have a computer at home connected to an interplanetary network.They would study at online schools with“e-teachers”.Life on Mars would be interesting as well as challenging.Moving to MarsMoving to MarsSpacecraft FoodGravity Houses Schools Spacecraft would travel at the speed of light.The journey might be uncomfortable.Food would most probably be in the form of pills and would not be so tasty.The gravity on Mars is about three eighths of that on the Earth.People need to wear special boots in order not to float off into space.People would live in houses with huge comfortable rooms.Robots would do housework.Students would study at online schools with the help of e-teachers.Pre-writingNot enough water or oxygenAgriculture problemsFood problemsBreathing problemsPlants cant grow on Mars.People wont have fresh food to eat.Humans cant breathe.It is said that there is not enough water or oxygen on Mars.This will cause some problems.First,plants cant grow without water.As a result,we will not have fresh food to eat.It is not good for health.Moreover,people will have difficulty breathing properly without enough oxygen in the air.Pre-writingLearn the language and tips for making article clean and livelyUse rich sentence patterns.Write the topic sentence.Use logical connectives.Pre-writingIt is said that there is not enough water or oxygen on Mars.This will cause some problems.First,plants cant grow without water.As a result,we will not have fresh food to eat.It is not good for health.Moreover,people will have difficulty breathing properly without enough oxygen in the air.Tips for making your article clear and livelyEntertainmentOnline games are very popular.Low-gravity basketball gamesMany online theatresVisit the two moonsTransport Comfortable Cars float in the airTraffic with no air pollutionMoney Stored in the Planet Mars Bank 1 is worth around M$10.Electronic Shopping Space clothes and foodLots of shopping mallsGoods from the Earth are hard to find.Life on MarsOral practicePre-writingHere is a guide to living on Mars in the future.On Mars,we use Mars dollars.We get about M$10 for every￥1,but we never see any of it!Mars Dollars are electronic and are stored at the(1)_.A very popular form of entertainment is online games.They make us feel like we are really inside the games!There are also many(2)_ theatres.There are(3)_ to visit,but most people may prefer to watch the amazing low-gravity(4)_ instead.There are lots of(5)_ on Mars.They sell(6)_ and food.Most things