module 1 unit 1 saving the earth 课件牛津上海版九年级英语下册.pptx

牛津上海版九年级英语下册 2023版课件 M1 Environment and lifeUnit 1Saving the Earth Why does our Earth cry for help? air pollutionland pollutionwater pollutioncutting down ... n. an article in a newspaper or magazinen that gives an opinon about a new book,play ,film etc.v. go overReading: The green consumer书评，影评Tony Ma wrote a review about the book.This book says our world is in danger. It describes the various threats to the environment. The situation is so serious that we must do something to save the Earth.variousthreatssave the Earth/ve?r??s/ adj. /θret/ n. The ____________ effectDamage to the ________ layer O3 层B_____ ________D___________ of the forests (destroy)1Threats Scan the passage , complete the subtitlesgreenhouseozone estructionad habits1234n.温室 a glass building used for growing plants that need warmth,light and protection./??z??n/ n. Read The greenhouse effect part, answer some questions./?tm?sf??(r)/ n.The writers ask us to ‘imagine that the Earth is inside a kind of greenhouse with the atmosphere around it. The atmosphere acts like the glass: it lets sunlight in and keeps warmth from getting out. The atmosphere is essential for all living things. Without it, the Earth would be as cold and lifeless as the surface of the moon’.‘The trouble is that our atmosphere is changing because we are polluting it with chemicals—in the form of gases—and it is keeping in too much heat!’1.Whats the use of the atmosphere? 2.Why is the atmosphere essential for all living things?3. Whats the problem with our atmosphere? ThreatCausesBad effectsThe Greenhouse effectComplete the table chemicals- in the form of gases (mainly CO2) 1.cause the level of the sea to rise2. flood cities and even whole countriesco2--carbon dioxide/?kɑ:b?n da??ksa?d/factories , carsbe produced by burning fuelsflood n. 洪水 v.（使）灌满水，淹没 Which threat makes worse ? the greenhouse effectDestruction of the forestsThreatCaus