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课件网) Welcome to the unit Unit 7 The natural world Enjoy the video What is an ecosystem An ecosystem is a large _____of _____ organisms in a particular area. In an ecosystem, the _____ and physical components are _____ together. What is an ecosystem community living living linked Kitty is learning about ecosystems.Read the facts below with her and tick the onesyou already know. Rainforests are home to over half of all the types of animals and plants on earth. be home to ... 是...的家园 Discussion Rainforests Around the world The Amazon rainforest The largest rainforest in the world Called the_____ of the planet for their role in absorbing carbon dioxide, and producing 40% of the planet’s oxygen, upon which all animals and humans depend for survival. lungs Coral reefs Kitty is learning about ecosystems.Read the facts below with her and tick the onesyou already know. Kitty is learning about ecosystems.Read the facts below with her and tick the onesyou already know. Coral reefs look like rocks,but they support a lot of life in just a small area. They provide shelter and food for at least 25% of all marine life in the ocean! Coral reefs are not plants or rocks — they are _____! animals Kitty is learning about ecosystems.Read the facts below with her and tick the onesyou already know. Grasslands often lie between deserts and forests. Transition zones Discussion Desert is very dry. When there is more rain, the land becomes a grassland in the middle. The grass can grow here. With even more rain, trees can grow, and the grassland becomes a forest. So, grasslands are often found between deserts and forests! Kitty is learning about ecosystems.Read the facts below with her and tick the onesyou already know. Grasslands often lie between deserts and forests. Grasslands are home to some of the fastest animals on Earth Kitty is learning about ecosystems.Read the facts below with her and tick the onesyou already know. The ice is home to animals like polar bears and penguins. Discussion Will they meet Polar bears live only in the Arctic, while penguins live only in the Antarctic — they never meet in the wild! What other ecosystems do you know Desert Ecosystem Wetland Ecosystem Marine Ecosystem Mountain Ecosystem Discussion Kitty and David are talking about ecosystems. Work in pairs and discuss the topic.Use the conversation below as a model. What ecosystems are they talking about grasslands desert Grasslands in different places are home to _____. different animals There are _____ and_____ . There are _____ and _____ . In Inner Mongolia In Africa horses cows lions giraffes Fill in the Blank Deserts are very _____ because there is little rain. The temperature difference between _____ and _____ is _____. The climate is so_____ that only _____animals and plants can live in deserts. Desert plants keep _____ in their _____. Many animals get _____ from these plants. dry day night a few water leaves water huge ... ...
