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1、welcome,Unit 4 Astronomy: the science of the stars,a. Enable Ss to talk about the science of the stars.,Teaching goals 教学目标,b. Understand the text and answer the following questions:,Teaching important points教学重点,Teaching difficult points教学难点,d. Discussion.,What will our future be if the earth may b
2、ecome too hot for the lives on it?,What was there on the earth before life could begin?,Talk about the beginning of life on the earth.,Teaching methods教学方法,a. Skimming and scanning.,b. Asking-and-answering activity to check the Ss understanding of the text.,c. Individual, pair or group work to finis
3、h each task.,Do you like stars or planets?,The Solar System,1111,Unit 4 Astronomy: the science of the stars,The Solar system,eight planets many comets(彗星) other objects,Neptune,Mercury,Venus,Earth,Mars,Jupiter,Saturn,Uranus,What are the names of the eight planets that circle our sun?,水星,金星,地球,火星,木星,
4、土星,天王星,海王星,Du Minjunxi comes from the planet of Kmt184.05. its said that its climate and environment are similar to the earths. But do it really exist? Maybe not because only on earth there is life.,How Life Began on the Earth,Period 1,Each religion and culture has its own ideas about how life began
5、 on earth. What do you know?,In China, we all know that Pangu separates the sky from the earth and Nvwa made humans.,In western culture, God created the world in seven days.,Ideas about how life began,The Big Bang,Fill in the blanks to learn about how life began. understand the meaning of each parag
6、raph.,Para.1 Para.2 Para.3,The _ of the earth,The importance of _ for life,The_ of plants and animals,The arrival of _ and their effects on the earth,theory,formation,water,development,humans,Before life appeared.,Different lives developed.,Para.4 Para.5,How life began on the earth,A _ about how the
7、 universe was formed,Read Part1 (para13) Before life appeared,How did the earths atmosphere form? Why was the earth different from the other planets? What a role the water played in the development of life?,1. How did the earths atmosphere form?,The earth was so violent. It exploded loudly with fire
8、 and rock to produce carbon, nitrogen, water vapor and other gases, which were to make the atmosphere.,2. Why was the earth different from the other planets?,Because the water on other planets had disappeared later.,3. What a role the water played in the development of life?,The presence of water al
9、lowed 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 develop,water,1 small plants in water,2 shellfish and all sorts of fish,3 insects (on land),4 amphibians (on land and in water),forests,5 reptiles (on land),
10、6 dinosaurs (on land),7 mammals (on land) small clever animals with hands and feet,8 human,Analyzing how life began on the earth,Read Part2 (para45),Listen to the tape,According to the pictures to summarize the passage,Listen carefully,Big Bang,A cloud of dust,Atmosphere,The earth,A solid ball,water
11、,water,Plants in the water,Shellfish and fish,Plants on land,Insects and amphibians,Reptiles,Dinosaurs,Mammals,humans came into being and spread all over the world.,The earth may become too hot to live on .,They are putting too much carbon dioxide.,Look! There is someone cutting a tree down,What sho
12、uld we do for our earth?,You can use the following words or phrases,water source, make full use of , drinking water , stop. electricity important, turn off. forests cut down, recycle .,Save water. Water is the source of life. No water, no life. Save electricity. It is important. We cant imagine what
13、 Save forests. They are useful .Please stop cutting them down and use recycled paper instead. Make our world a,Only if we care will we help! Only if we help shall all be saved!,So its very important for us to do so. Not only should we protect drinking water and stop polluting it, but also make full
14、use of it.,the life will be like without it. Everyone should do his best to save electricity. Dont forget to turn off lights or other electric machines when we finish working.,green one to live in.,We have only one earth!,Lets take part in the activities to save the earth!,About how to protect the e
15、arth write a short passage use the sentences you just now prepared.,Thank you!,Read Part1 (para13) Before life appeared,According to a widely accepted theory, how did the stars form? How did the earths atmosphere form? Why was the earth different from the other planets? What a role the water played
16、in the development of life?,1. According to a widely accepted theory, how did the stars form? 2. How did the earths atmosphere form?,The universe began with a “Big Bang” that threw matter in all directions, then atoms began to form and combine to create stars.,The earth was so violent. It exploded loudly with fire and rock to produce carbon, nitrogen, water vapor and other gas
