新课标人教版高中英语必修3Unit4AstronomyWarmingupreading课件PPT学习教案

1、会计学11. Whats the meaning of the word “Astronomy”?I. Warming upthe science of stars;the scientific study of stars and planets.2. What words will you think of when we talk about this topic? star, planet, the sun / moon / earth, solar system 恒星恒星 行星行星 太阳太阳 月球月球 地球地球 太阳系太阳系 3. How many planets are in th

2、e solar system? 第1页/共32页Scientists now think Pluto is too small to be called a planet.第2页/共32页The Solar SystemThe Solar System1111第3页/共32页5. The names of eight planets.1) 水星水星2) 金星金星3) 地球地球4) 火星火星5) 木星木星6) 土星土星7) 天王星天王星8) 海王星海王星商业之神商业之神”和和“旅行之旅行之神神”爱与美之神爱与美之神该亚该亚战神战神天神天神农业之神农业之神宇宙之神宇宙之神海神海神第4页/共32页M

3、ercury Venus Earth Mars Jupiter Uranus Saturn Neptune6. Put them in correct order on P25.Do you know their origin?第5页/共32页II. Pre-reading1. Have you ever asked your mother, “Mom, where do I come from”?2. Nearly everybody has this or that puzzles:How do human beings come into being?How does the earth

4、 come into being?3. In China, there are two legends about these puzzles. Do you know the names?第6页/共32页盘古开天辟地盘古开天辟地 女娲补天造人女娲补天造人 4. In the western culture, who creates everything in the world?第7页/共32页III. Fast-reading1. Do you believe in such stories? Are they based on science?2. In this unit, well

5、learn something more scientific.3. Whats the title of the text?4. From the title, we can predict that the text may tell us the origin of life on the earth.第8页/共32页Paragraph 1:Paragraph 2:Paragraph 3:Paragraph 4:Paragraph 5:D. A widely accepted theory about the formation of the universeC. The formati

6、on of the earth A. The importance of water for lifeB. The development of plants and animals on the earthE.The arrival of humans and their impact on the earthRead quickly and match the main idea of each paragraph第9页/共32页Stage 1 : The development of the earthStage 2 : The development of life(para 13)(

7、para 45)第10页/共32页Stage 1: The development of the earth(1) After the Big Bang, what was the earth like? a cloud of dust a solid globe 第11页/共32页exploded with fire and rock produced water vapour and gases(2) What happened next?第12页/共32页(3) What did the water vapour and gases form?the earths atmosphere第

8、13页/共32页 Water appeared(4) What appeared as the earth cooled down?water is important for the beginning of life on the earth. 第14页/共32页第15页/共32页Stage2 The development of lifeStage2 The development of life第16页/共32页 small plants appears in water 1.What life developed after water appeared?第17页/共32页Shell

9、fish and all sorts of fish 2.What life developed in water next?第18页/共32页 green plants began to grow on land insects appeared3.What about the life on land?第19页/共32页amphibians on land and in the waterforests4. What life developed next on land?第20页/共32页 reptiles appeared dinosaur developed 5.What life

10、developed after forests appeared?第21页/共32页mammals on land6.What life developed after dinosaurs?第22页/共32页 small clever animals7. What life developed after mammals?第23页/共32页第24页/共32页 Because they are putting too much carbon dioxide into the atmosphere, which prevents heat from escaping from the earth

11、into space.The earth may become too hot to live on .第25页/共32页 The e a r t h i s becoming hotter and hotter!第26页/共32页23456789101 small plants in watershellfish and all sorts of fish insects reptilesamphibiansmammalsdinosaurs humansplantsanimalsGreen plants on landforests第27页/共32页831091151741262Ex.2 o

12、n P27第28页/共32页dustexplodedin timecarbonwater第29页/共32页 _ in water are considered to be the earliest lives on the earth. The O2they supplied encouraged the lives of_. Slowly green plants grew on land, which were followed by _like insects & _. When the plants grew into_, _ appeared. Then _ developed but disappeared later, which made the rise of