人教新课标高中英语必修三Unit-4-Astronomy：-the-science-of-the-s.ppt

Unit 4 Astronomy:the science of the starsAstronomy is the scientific study of the universe and the heaven bodies(such as the sun,the moon,and stars),gas,and dust within it.astronomersolar system eight planets many comets other objects What are the English names of the eight planets that circle our sun?海王星海王星 Neptune水星水星Mercury 金星金星Venus Venus 地球地球Earth Earth 火星火星Mars Mars 木星木星Jupiter 土星土星Saturn 天王星天王星Uranus Pre-reading2.Each religion and culture has its own ideas about how life began on earth.What do you know?In China,we all know that Pangu separates the sky from the earth.Pangu separates the sky from the earth The Goddess Nuwa mended the heaven and created human beings from the clay(粘土粘土).Day 1:God spoke and separated light from darkness creating Day and Night Day 2:God spoke and separated the water creating sky and ocean Day 3:God spoke and created dry land Day 4:God spoke and created the sun,moon and stars Day 5:God spoke and created living creatures in the air and sea Day 6:God spoke and created the land animals and man Day 7:God rested and blessed this day calling it Holy God created the world in seven days:Day 4:God spoke and created the sun,moon and stars Day 5:God spoke and created living creatures in the air and sea Day 6:God spoke and created the land animals and man Day 7:God rested and blessed this day calling it Holy How Life Began on the EarthThis text can mainly divided into two stages:Stage 1:The development of the earthStage 2:The development of life(para 13)(para 45)Reading for structure:Reading for information:Para 11.What is the widely accepted theory?A Big Bang that threw matter in all directions.2.What has happened after that?Atoms began to form and combine to create stars and other bodies.A Big BangatomstarsReading for information:Para 2For several million years after the Big Bang.a cloud of dustbetween 4.5 and 3.8years agoa solid globeit exploded with fire and rockcarbon dioxidenitrogenwater vapour.other gasesmake the earths atmosphereWhats even more important?The earth cooled down and water began to appear on its surface.Reading for information:Para 3Water appeared on the _,besides that,water had also appeared on other planets like_,but it had _ later.earthMarsdisappearedWhat a role the water played in the development of life?The presence of water allowed the earth to dissolve harmful gases and acids into the oceans and seas.This produce a chain reaction which made it possible for life to developStage2 The development of lifeReading for information:Para 4-5Make a timeline of the development of life:ertremely small plants appears in waterShellfish and all sorts of fishgreen plants began to grow on landland animals:insects&hibiansforestsreptiles appeareddinosaurthe rise of mammalssmall clever animals with hands and feetReading for information:Para 4-51.Who are the small clever animals with hands and feet?2.Are they taking care of the earth well?Why?Because they are putting too much carbon dioxide into the atmosphere,which prevents heat from escaping from the earth into space.Human BeingsThe earth became too hot to live on 1.Retell the passage according to the form.2.Suppose you were the earth,what would you advise humans to do?Write a letter to the human being.