高中英语外研版（2019）选择性必修第二册Unit 5 A delicate World Starting out 课件（共11张PPT）

1、A delicate worldThe environment where different types of plants, animals and species liveDifferent kinds of animals and plants in a balanced environmentEcosystemBiodiversityMatch the definitions（定义）with the terms (术语)生态系统生物多样性The _ (more/less) different kinds of living things in the _, the more succ

2、essful it is.moreecosystemBiodiversityEcosystemNon-living thingsLiving thingsBiodiversity determine influenceComplete the mindmapAll the living things on the Earth live in _ What are they on Earth?ecosystemsWe can think of an ecosystem as this wooden puzzle gameEcosystems are a little bit like this

3、game of sticks(游戏棒) Which figure of speech(修辞手法) is used here?类比We can think of an ecosystem as this wooden puzzle gameEcosystems are a little bit like this game of sticks(游戏棒) What does the writer suggest?The things that live in ecosystems _ each other. They are _depend onconnected The whole thing

4、represents an _The woods stand for _ including _who fit all together and _ each other to live. If a species go _, it you disappear from the ecosystem. Losing few of them _cause too much trouble. ecosystemspecieshumansdepend onextinctwill not But losing too many will make the _rickety(摇晃的).Humans hav

5、e to manage the ecosystem extremely _. If not, it will _and there wont be any place for human beingsecosystemcarefullyfallSatellite Images of Aral Sea, Central Asia What is happening to the area according to the satellite images? Aral Sea is becoming _ and _smallersmallerSatellite Images of Aral Sea, Central Asia 2. What do you think a later satellite image would show? 3. What do you