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1、- 1 -UnitUnit 1 1 lifelife onon MarsMars MainMain TaskTask 第一部分 简要提示 一、年级：九年级二、教学内容：9B Unit 1 Life on Mars三、课型：中心任务课四、教学目标 1 知识目标 学会和掌握流程图的制作方法, 为写作做准备。 2 能力目标 1) 能根据主题设计流程图。 2) 能根据流程图写一篇文章。五、教学重难点1 重点 指导学生根据主题来选取写作所需信息，设计写作流程图。 2 难点 指导学生如何将流程图列出的信息扩展成文。 第二部分 教学流程 用时：20 分钟 Step 1 Lead-in 用时： 分钟 （出境）
2、T: Hello, everyone. Nice to see you again. Today we are going to learn Main Task. (大家好，很高兴又和大家见面了！今天我们一起来学习中心任务部分)。Daniel wants to make a guide to living on Mars in 2100，but he needs help . Before we help him with the guide , let me remind you of the information weve known about Mars. (Daniel 梦想着有一天
3、搬去火星。现在他想做一份 2100 年到火星上生活的指 南. 在我们帮助他一起做指南之前，让我们一起来回顾一下所学火星的信息。) (PPT) Step 2 用时： 分钟T: Boys and girls , weve learned a lot about Mars. Can you say something about it according to the keywords ? Lets start . Task One How much do you remember about Mars? (PPT) 1 Temperature: -133 - 27 2 Color: red 3 M
4、oons: Phobos, Deimos 4 Size: about one-half the diametre of Earth 5 Location: between Earth and Jupiter 6 Distance from the Sun: 142,000,000 miles away 7 One year on Mars: 687 Earth days 8 Surface: a little like the surface of Earth 9 Atmosphere: 95% carbon dioxide- 2 -T: From the reading weve known
5、 that life on Mars is very different from that on Earth. And do you still remember what changes may bring to life on Mars ? Say something about each keywords. Lets see who has a good memory. Task Two About life on Mars (PPT) 1 Transport: space shuttles instead of spacecraft 2 Food, water, air: devel
6、op plants to produce 3 Gravity: three-eighths of that on Earth, fly away into space special boots 4. Home: in a dome with ten bedrooms and robots do most work 5. School: online schools, e-teacher, computers connected to interplanetary network T: So many people think its better to move on Mars becaus
7、e there are so many advantages . , but there are some disadvantages too. Can you help me about the two sides again. Task Three Advantages and disadvantages of living on Mars. (PPT) Advantages Its not crowded or polluted. The transport is more convenient . People will wear fashionable boots . People
8、will have more space . Robots will do most of our work. Well have more time for hobbies. Students will study in online schools.Disadvantages Low gravity will be dangerous. Food does not taste good. Space travel make people feel ill / sick . Its too cold to stay outside. Its too far away from friends
9、 on Earth. T: It seems that there are more advantages than disadvantages . So lets do a survey: How many of you would like to move to Mars? Show me your hands if you want to. Task Four Do a survey about moving to Mars. (PPT) Percentage of students who want to move to Mars: _?_ % T: Fine . Daniel wan
10、ts to move there too. And he made a flow chart about Mars .Lets find out how he did it. T: Daniel has a lot to think about before moving to Mars . He imagines that shopping, animals, money, free time and transport on Mars are different and interesting. Task Five Imagine what will life be like on Mar
11、s (PPT) 1 Shopping 2 Food 3 Weather 4 Money - 3 -5 Clothes 6 Transport 7 School 8 House 9 Animals 10 Free time T: Here are five differences that he may find about life on Mars: transport; shopping; money; animals and free time. Task Six Match Daniels ideas about living on Mars with different subject
12、s. (PPT) 1. Cars float in the air 2. Keep them away with laser light 3. Low-gravity basketball game 4. Many online theatres 5. No air pollution caused by traffic 6. Planet Mars Bank 7. Space fashion and food shop 8. Things from Earth are hard to find 9. Usually friendly 10. Visit the two moons ( sub
13、jects: Animals, Transport, Free time, shopping, money ) T: OK. Lets check the answers on page 19 together. T: Use the information in the flow chart to fini sh the exercises on page20 of SB. Now lets check the answers. (PPT) Keys 1 friendly 2 angry 3 laser light 4 Planet Mars Bank 5 online 6 two moon
14、s 7 low-gravity basketball 8 shopping malls 9 space fashions 10 hard to find 11 comfortable 12 never late 13 no air pollution 14 floats in the air T: Congratulations, you got all the right answers. T: Well , Daniel has finished his flow chart and his writing. Lets try to make our own. (Daniel 完成了他的流
15、程图和书面表达, 让我们来做自己的吧.)/T: Firstly, choose the planet you like ; secondly decide how many subjects you would like to talk about ;third ly search the information about each subject ; then arrange all the information well, lastly , make your own flow chart and write an article about your flow chart. (第一选择你喜欢的星球；第二决定你要谈论 的几个话题；搜索关于每个话题的信息；合理安排这些信息，最后制作你的流程图并把它 写成文章。)Task Seven My own imagination about living on another planet (PPT) T: Here are some subjects you may choos
