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课件网) Unit 7 The natural world read about different ecosystems; learn about protecting ecosystem; give suggestions on how to protect ecosystems; better understand the importance of protecting ecosystems. rainforests coral reefs grasslands the ice ecosystems 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 This kind of bird likes to live in open areas with water, like wetlands. ecosystem What is an ecosystem An ecosystem is like a community where living things and non-living things work together. What will we do in this unit better understand the importance of protecting ecosystems. give suggestions on how to protect ecosystems; learn about protecting ecosystems; read about different ecosystems; 2 4 1 3 In this unit, we will What different types of ecosystems do you know forests oceans polar regions wetlands grasslands deserts 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 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 What can you see in these pictures 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. Presentation Polar ecosystem penguins stand on the ice The ice is home to animals like polar bears and penguins. Listen and complete _____ in different places are home to different animals. In Inner Mongolia, there are _____ and _____, but in Africa, there are _____ and _____! It’s very _____ in deserts because there’s little rainfall. The climate in deserts is so _____ that _____ animals and plants can live there. The desert plants keep water _____ and many animals there get water from these plants. Grasslands / re n f l/ n. 降雨量，下雨 Kitty and David are talking about ecosystems. Listen to conversation. Fill in the blanks with words or phrases you heard. horses cows lions giraffes dry awful only a few in their leaves / kla m t/ n.气候 Read in roles 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. What other fun facts about ecosystems do you know The tundra(苔原) ecosystem has a very short growing season because it’s so cold. The tree hole ecosystem is a tiny home in old trees—rainwater fills the hole, and it becomes a pool for mosquito larvae, while birds sometimes drink from it! The rooftop garden ecosystem(small gardens on building tops) helps cool the building in summer, and butterflies love to visit the flowers there. A: Do you know ... ...
