Unit 4 Our World Topic 1 Plants and animals are important to us. Section C

(课件网) Unit 4 Our World Topic 1 Plants and animals are important to us. Section C earth n. 地球；土，泥；大地 rainforest n. (热带)雨林 forest n. 森林 wood n. 木头，木材；woods 树木，森林 Forests give us … rubber n.橡胶 Read and understand 1a (影片1) Read 1a again and complete the following tasks. 1. What does “cover” mean in this passage A. set up B. spread over C. have D. form 2. We can’t get the answer to Question _____ from the passage. A. What are in rainforests B. Why are rainforests important to us C. What can we get from rainforests D. What should we do to protect rainforests 3. Why are rainforests “the lungs of the earth” 4. What’s the main idea of the passage B Because the plants in the rainforests help to make the air fresher. They also help to control the climate. D Rainforests are very important to us. Key points Rainforests cover 6% of the earth’s surface. six percent Thousands and thousands of animals live in rainforests. 成千上万的 成百上千的 成百万上千万的，数以百万计的 hundreds of millions of Key points But now rainforests are becoming smaller and smaller. 越来越小 “形容词比较级+and+形容词比较级” 或“more and more + 多音节形容词原级” e.g. 天气变得越来越暖和了。 The weather gets warmer and warmer. 中国越来越美丽。 China is more and more beautiful. Key points Read 1a again and write down the importance of rainforests. make the air fresher control the climate give us wood, rubber,fruit, medicine and so on 1c Group work Add your own opinions and then report it to your class. What covers most parts of the earth Water. It’s in rivers, lakes, seas and oceans. Read and understand 2a (影片2) Complete the passage according to 2a. Water is _____ to all living things. All _____ and _____ need water. _____ also need water to drink, to cook and _____ _____ . _____ water, there could be no life on earth. So we must save water. important plants animals Without Humans to clean Water is necessary for all plants. 对……来说，很必要 Grammar focus Humans need water to drink, to cook and to clean. In fact, water makes up the largest part of the human body. Grammar focus 实际上 形成，构成； 和解 Number the following sentences to form a passage about how to plant a tree. Spring is warm. It’s the best season to plant trees. When you plant a tree: 3 Work alone First, dig a hole in the earth, and make sure the hole is deep enough for a tree. Step by step Then, put the tree in the hole, and keep it straight. Step by step After that, fill the hole with earth, then make the earth hard with your feet. Step by step Finally, water the tree. If everything is OK, the tree will grow new leaves a few days later. Step by step Retell how to plant trees according to the pictures. 1 Are there rivers and lakes in your hometown 2 Is the water there dirty or clean Why 3 Did you do anything useful to protect the clean water 4 What should we do to keep the water clean 5 What would the world look like with ... ...