资源简介 (共20张PPT)Welcome to the unitUnit 7The natural worldEnjoy the videoWhat 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 communitylivinglivinglinkedKitty 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DiscussionRainforests Around the worldThe Amazon rainforestThe largest rainforestin the worldCalled 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.lungsCoral reefsKitty 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 ________!animalsKitty is learning about ecosystems.Read the facts below with her and tick the onesyou already know.Grasslands often lie between deserts and forests.Transition zonesDiscussionDesert 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 EarthKitty 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.DiscussionWill 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 DesertEcosystemWetland EcosystemMarine EcosystemMountain EcosystemDiscussionKitty 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 grasslandsdesertGrasslands in different places are home to ____________.different animalsThere are _______ and_______ .There are _______ and _______ .In Inner MongoliaIn AfricahorsescowslionsgiraffesFill in the BlankDeserts 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.drydaynighta fewwaterleaveswaterhugeawfulPair workA: Do you know anything about ecosystems B: Yes! I know that …A: Oh, really Do you know anything about … B: Well, … cover about … of the earth’s surface.A: Yes, they are home to ...B: It’s true. They help …DiscussionWhy are ecosystems important 04030102Provide natural resourcesProtect biodiversityBe part of a food chainKeep the balanceProtecting ecosystems today means protecting our tomorrow.THE ENDThank You备用音频 展开更多...... 收起↑ 资源列表 8Aunit7 Welcome to the unit.pptx what is ecosystem？.mp4 珊瑚礁 (1).mp4
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