公开课高中英语必修三unit4warmingupandreading.ppt

公开课高中英语必修三unit4warmingupandreadingUnit 4 Astronomy:the science of the starsPangu separates the sky from the earth.Nvwa makes human beings.God created man.Do you know how life begins on the earth?4.Choose the main idea for each paragraph ()The arrival of humans and their impact on the earth.()The formation of the earth.()The development of plants and animals on the earth.()A widely accepted theory about the formation of the universe.()The importance of water for life.54213Fast reading Passage structureMain bodyPara 1:Para 2:Para 3:Para 4:Para 5:A widely accepted theory about the formation of the universe.The formation of the earth.The importance of water for life.The development of plants and animals on the earth.The arrival of humans and their impact on the earth.Read the passage carefully and analyze its Read the passage carefully and analyze its structure:structure:earth,atmosphere and waterlife development on the earthhuman beingsPage 27Careful reading Task one Author organizes the text according to time.Ok,please quickly find the time from the text.Ok,next we will read the text according to timeSeveral billion years after the“bigbang”between 4.5 and 3.8 billion years ago Many millions of years later About 2.6 million years agoTimeline Para 2Several billion years after the“big bang”between 4.5 and 3.8 billion years ago The earth was still just _.Then the dust settled into a _.Then the earth became so violent and explode to produce its_.solid globe atmosphere Task two ta cloud of dusPara 4Many millions of years later The first small plants on the surface of the water produced_.Early _ and all sorts of fish appeared._ began to grow on land.followed by land animals ,some are insects others,called_ oxygen shellfish green plants amphibians Many millions of years later When the plants grew into forests,_appeared.After that,some _,called dinosaurs developed.The disappearance of dinosaurs made possible the rise of _ on the earth.reptileshuge animalsmammals About 2.6 millionyears agoNowHumans produce too much carbon dioxide,making the earth too hot to live in.Para 5 After the clever animals(humans)became important on the earth,what happened?Answer question waterPlants in the waterShellfish and fishInsects and amphibiansReptilesDinosaursMammalsPlants on landThe oder of life on the earthBig Bang 4.5-3.8 billionmany million years later 2.6 millionNow Time Events Big Bangdust solid globewater appearssmall plantsshellfish and fishplants grow on the land insects and amphibians reptiles dinosaur mammals clever animalshumans life earth 1.Who are the small clever animals with hands and feet?2.Are they taking good care of the earth?Para 5 Greenhouse effectBut they are not taking care of the earth very well.What problem are humans causing?make the earth too hot put too much carbon dioxide into the atmosphereAs young people,what little things can we do for the earth?solar energy plant trees recycle rubbish prevent desertificationsave water purify air.Homework:Exercise1,2,3 on page 28结束结束