《九上U2T2SB.ppt》由会员分享，可在线阅读，更多相关《九上U2T2SB.ppt（21页珍藏版）》请在taowenge.com淘文阁网|工程机械CAD图纸|机械工程制图|CAD装配图下载|SolidWorks_CaTia_CAD_UG_PROE_设计图分享下载上搜索。
1、Unit 2 Saving the EarthTopic 2 All these problems are very serious.Which color do you like best? Why?Which color can make you the most relaxed?What can trees do for us?What can trees do for us?Our lifeOur environmentWhat will our world be like without trees?What will our world be like without trees?
2、 sandstorm desert human beingsWhat should we do ?We should stopcutting down trees.We should prevent people from cutting down trees.Listen to 1a, answer the questions.What are they talking about?What causes this kind of bad weather?They are talking about sandstorms.People have cut down too many trees
3、. A lot of rich land has changed into desert.（录音（录音p35-1a）Read 1a, answer the question.What are trees functions?Trees can stop the wind from blowing the earth away.A lot of water can be saved by forests.Trees can also prevent the water from washing the earth away.A.B.C.Look at the picture, describe
4、them using the words given. wash the earth away many trees change into desert forests gone sandstorms come into being cut down treesNumber the pictures and then talk about them in groups. Do you know how sandstorms come into being? 415362 Trees are very useful to us. They can help us p_ the wind fro
5、m blowing the earth away and stop the s_ from moving towards the rich land. Trees also s_ water from running away. They can keep a great d_ of water. So we must stop people from c_ down toomany trees. Otherwise a lot of rich land willchange into d_, l_ only sand. We must get rid of (摆脱摆脱) this kind
6、of bad b_. revent and ave ealutting esert eaving ehaviorTrees are important to us, what can we do to protect them? We should prevent people from Protecting and Saving Water Water is very important to human beings, but not everybody knows how to protect and save it. Here are some ways:1. Pass laws ag
7、ainst water pollution.2. Stop factories pouring waste water into rivers.3. Remember to turn the tap off when you leave.4. Collect and reuse waste water. .The wind is blowing strongly with lots of sand.People have cut down too many trees.A lot of rich land has changed into desert.And a lot of water can be saved by forests.They can also prevent the water from washing the earth away.Stop factories from pouring waste water into rivers.