M5U2-Welcome-to-the-unit.doc

双峰四中高二英语 No. 15 编写：王一梅 班级：194 2012. 9M5U2 The environment Name _ Welcome to the unitLearning Aims:1. To discuss about the environmental problems caused by nature or by man.2. To talk about what you can do to protect the environmentLearning Procedures:Step 1 自主学习A. Can you explain the environment in your own words? _.Eg. It is the place where _, _ and _ live. It is the _ world. Possible answers: people, animals, plants, natural.B. When we talk about the environment, what words will come to your mind?Think of as many words as you can._.C. Compared with the last few years, do you think the environment is getting better or worse? _.D. What might be the reasons for the changes? _.Step 2 合作探究Discussion:Picture 1:1. Have you ever experienced an earthquake?2. Can you list some big earthquakes happened in China?3. Can you describe how terrible an earthquake is?Eg. The earth is _. shaking All the buildings will _ _. fall down Many people will _. die Many children will become _ homeless4. What damage will it bring about?Eg. Everything is in _; people suffer a lot of _. ruins, losses Picture 2:1. Look at the picture, there is smoke coming out of the chimney. Suppose this factory is in your neighbourhood, how do you think the smoke will affect you? _.2. Compared to the economic benefits a factory can bring to a neighbourhood, how important is environmental protection? Why? _. Picture 31. Have you ever seen a volcano?2. Have you ever heard of an volcano? 3. What is it ?_.4. Can you describe it?_.5. What will an volcano bring to the local people?_. Picture 4:1. How do you feel when you see piles of rubbish like this? _.2. In your daily life, how do people deal with everyday rubbish? _.3. Do you think it possible for us to classify rubbish as recyclable or that cannot be recycled? _.4.Do you think rubbish is a big problem for the environment?_.Step 3 展示交流Step 4 点拨总结Step 5 巩固练习A. Discuss which problems above are caused by nature and which ones are caused by man? Caused by natureCaused by man Problems aboveB. Can you think of other natural disasters that damage the environment and other ways in which people damage the environment?Natural disasters: _People : _.C. Fill in the blanks with proper words:1. Forest fires and sandstorms sometimes are partly caused by 1._.There are only certain measures we can take to 2. _ natural disasters from happening. Volcanoes and tsunamis are other natural disasters that 3._ the environment. The 4._ of the volcano eruption will engulf （吞没，吞食）the region around.The tsunami that ravaged （毁坏） South-east Asian countries in December 2004 proved just how destructive nature can be. 5._ of people died while thousands more were left 6._.2. People who work in the agricultural industry can damage the environment without even realizing it. For example, fertilizers(化肥) and pesticides（杀虫剂） are often used to simulate the 7._ of crops and to 8._insects. However, when these chemical substances(物质) are discharged（排放） 9._ rivers and lakes, plants and animals are often 10._. In some areas where the river is 11._ because of these chemicals, the people 12._ live there are affected. Answers: 1.nature 2.prevent 3.damage 4.