Unit 2 Saving the Earth-Topic 2 All these problems are very serious.-Section A-ppt课件-(含教案+视频+音频)-市级公开课-仁爱科普版九年级上册(编号：a060b).zip

Unit 2 Saving the Earth Topic2 All these problems are very serious. SectionSection A A Game time 对对碰 相邻的两个颜色相同的单词可以消掉， 老师让学生读单词，老师点击。 注意点击时一定要看好再点， 否则无法返回。 当出现没有相邻的同色椭圆时， 游戏失败。 ？ sandsandstorm change into completely human beingalthough human being reduce completelyalthough desertsandstorm Change into completely sanddesert reducereducesand Human being althoughreducehuman being completely competition sand sandstorm Human being Change into desert although reduce completely What can trees do for us?What will our world be like without trees? Listen to 1a, choose the answer. The boy and girls are talking about _ A.different types of sandstorms B.the reasons for sandstorms C.sandstorms in different cities （录音（录音1） B 1. Trees can stop the wind from blowing the earth away. 2. A lot of water can be saved by forests. 3. Trees can stop the water from washing the earth away. 1C Read 1a and complete trees functions. Do you know how sandstorms come into being? Number the pictures . wash the earth away many trees Look at the pictures, describe them using the words given. cut down trees sandstorms come into being forests gone change into desert Free talk: 1.Are trees important to us?why (trees functions)? 2.What will our world be like without trees? 3.What can we do to protect the earth? We should (had better) ought to ) We shouldnt (had better not ought not to) 1.We have known: 1)phrases: 2)the importance of trees: 2.We have known: Summary Trees, our friends! (以以free talk为提纲为提纲) 环保格言环保格言: 1、哪里有绿色，哪里就有生命。 where there is green, there is life. 2、我们的地球需要每个人的保护。 We need everyone to protect the earth. 3、从自己做起，爱护我们的家园。 Starts from oneself, to take care of our home Homework Thanks for listening Topic2 SectionA 学习导航学习导航 【学习目标学习目标】 1.1.知识目标：知识目标： 1).识记生词识记生词: sand, sandstorm,change into desert, human being,although,reduce,completely, 2)明确以下短语意义并能熟练应用明确以下短语意义并能熟练应用 be harmful to, as a result，do something ， stopprevent from doing, change into， blowaway， cut down 2.能力目标：生能据本节所学习的内容表述沙尘暴的形成过程及如何保护环境能力目标：生能据本节所学习的内容表述沙尘暴的形成过程及如何保护环境. 3.情感态度价值观：教育学生保护环境爱护树木应从身边的小事做起。情感态度价值观：教育学生保护环境爱护树木应从身边的小事做起。 【学习重难点学习重难点】 1.从对话中提炼关于树木的三种功能的信息。从对话中提炼关于树木的三种功能的信息。 2.用所给的提示词描述沙尘暴的形成过程。用所给的提示词描述沙尘暴的形成过程。 【学习过程学习过程】 一：热身导入：观看杰克逊的一：热身导入：观看杰克逊的 MV“Earth song ”& 师生对话师生对话 1. What can trees do for us? 2. What will our world be like without trees? 二：自主学习二：自主学习&质疑质疑 1.Listen to 1a and choose the best answer. 2.Read 1a and complete trees functions. 3.Do you know how sandstorms come into being?Number the pictures 三：互动释疑三：互动释疑 Work in pairs and describe the pictures with the words given. 四：合作探究四：合作探究 Work in gorups and speak out. 1.Are1.Are treestrees importantimportant toto us?whyus?why (trees(trees functions)?functions)? 2.What2.What willwill ourour worldworld bebe likelike withoutwithout trees?trees? 3.What3.What cancan wewe dodo toto protectprotect thethe earth?earth? ( (We should We shouldnt) 五：反馈训练五：反馈训练 Exercises: Fill in the blanks with the correct forms. be harmful to, as a result， stopprevent from doing, change into， do something ，blowaway， cut down,. 1. People have cut down such a large mumber of trees that the land_ desert. 2.There are fewer trees left,so the wind always_ the earth_. 3.Air pollution has become a serious problem,so we must_to reduce it. 4.We should try our best to _people_cutting down trees. 5.In the future,human beings can protect the trees well._,animals will live a happy life in the forest. 6. _trees is bad behavor(行为行为). 7. Reading in the sun_your eyes. 六六 内容小结：内容小结： We have learned:Phrases: The importance of trees(trees functions): We have known： 七家庭作业：以七家庭作业：以”Trees,our friends”为题写一篇书面表达（可以以为题写一篇书面表达（可以以“四四”为纲）为纲）