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课件网) Unit 7 The natural world Welcome to the unit What can you see in the picture We can see a white bird flying over the water. Where does this kind of bird like to live In open areas with water, like wetlands (湿地). What is an ecosystem An ecosystem(生态系统) is like a community where living things and non-living things work together. What different types of ecosystems do you know forests oceans wetlands grasslands polar regions(地区) What can you see in this picture Rainforests are home to over half of all the types of animals and plants on earth. Rainforest ecosystem ...的家园 Coral reefs look like rocks, but they support a lot of life in just a small area. /ri f/ n. 礁 / k r l/ n. 珊瑚 Ocean ecosystem What can you see in this picture Grassland ecosystem wide open areas with green grass and a few trees Grasslands often lie between deserts and forests. What can you see in this picture v. 位于 Polar ecosystem penguins stand on the ice The ice is home to animals like polar bears and penguins. / pe ɡw n/ n. 企鹅 What can you see in this picture A. Fun facts about ecosystems rainforest ecosystem ocean ecosystem grassland ecosystem polar ecosystem What other types of ecosystems do you know deserts tundra(苔原) ecosystem tree hole ecosystem B Listening What are they talking about Listen to Kitty and David’s conversation and answer the questions. Ecosystems. Grasslands and deserts. What ecosystems are they Read in roles / kla m t/ n.气候 Read aloud B Read and fill in the blanks. Grasslands Deserts Climate ─ It’s dry with little (3) _____ . There’s huge difference in (4) _____ between day and night. Animals & plants Grasslands in different places are home to different animals, like (1) _____ in Inner Mongolia, but (2) _____ in Africa. (5) _____ animals and plants can live there. The desert plants keep water in their (6) _____ , and many animals can get water from these plants. horses and cows lions and giraffes rain temperature Only a few leaves C. What other fun facts about ecosystems do you know Oceans cover about 71% of the earth's surface, making them the largest ecosystem on earth. Grasslands have very few trees but lots of tall grasses and wildflowers. In deserts, some plants can live without rain for years. Polar bears live in the North Pole, and penguins live in the South Pole. A: Do you know anything about ecosystems B: Yes! I know that …in different places are home to... In..., there are ..., but in..., there are ... A: Oh, really Do you know anything about … B: Well, …it’s ... And... A: Yes, the climate in ... is ... B: It’s true. They help … and give food to ... Make up a new dialogue Discussion: Why is it important to protect the environment To treat the earth kindly is to treat oneself kindly. 句中的 so ... that...意思是“如此……以至于……”,引出结果状语从句。其中so是副词修饰形容词或副词。如: The bag is so heavy that I cannot carry it. 这个袋子太重了，我提不动。 1. ... ...
