(
课件网) 仁爱科普版 九年级英语 上册 Unit 2 Saving the Earth Topic 2 All these problems are very serious. Section A Learning objectives: At the end of the class, you will be able to: 1.Tell how sandstorms come into being. 2. Know the functions of trees. 3. Think about ways of protecting trees. 4. Write a proposal(倡议书) to call on people to protect trees. What can you see in these pictures earthquake tornado/t ne d / flood drought What kind of weather What do you think of it Sandstorm / s ndst rm / 3 Do you know how sandstorms come into being Number the pictures and talk about the sandstorm in groups. wash the earth away many trees change into desert/ dez t / forests gone sandstorms come into being cut down trees 4 1 5 3 2 6 They are talking about sandstorm. Listen to 1a and choose the best answer. The boy and girls are talking about _____. A. different types of sandstorms B. the reasons for sandstorms C. sandstorms in different cities 1b What causes these sandstorms People have cut down too many trees. As a result, a lot of rich land has changed into desert. Task1: Watch the video and fill in the blanks. Kangkang,Maria and Jane are talking in a room. The wind outside is blowing . But it’s better than the last few years. There were sandstorms before. While Kangkang was walking down the street, he couldn’t see . The sand really hurt his face. The weather was so bad. Jane said because people too many trees. As a , a lot of rich land had into . Trees could stop the wind from the earth away.Kangkang said a lot of water could be saved by forests.Jane said trees could also the water from washing the earth away. down trees affected the weather so much. It was to human beings, animals and plants. Although there were sandstorms before, now we have built “The Green Great Wall”. Our environment has become much better. strongly anything cut down result changed desert blowing stop harmful Cutting Read 1a and complete trees’ functions. 1c Trees’ functions Trees can stop the wind from blowing the earth away. They can also stop the water from washing the earth away. B. A lot of water can be saved by forests. A. _____. C. _____. DISCUSS: Do you have more ideas about the functions of trees (Kangkang,Maria and Jane are talking in a room. The wind outside is blowing strongly.) Maria: What a strong wind! Kangkang: Yes. But it’s better than the last few years. There were sandstorms before. While I was walking down the street, I couldn’t see anything. The sand really hurt my face. Maria: Why was the weather so bad Jane: People cut down too many trees. As a result, a lot of rich land changed into desert. Trees can stop the wind from blowing the earth away. Kangkang: And a lot of water can be saved by forests. Jane: Trees can also stop the water from washing the earth away. Maria: Cutting down trees affects the weather so much. Kangkang: Yes. It is harmful to human beings, animals and plants. Although there ... ...
