人教版必修三unit4_astronomy-reading課件.ppt

1、Unit 4 Astronomy: the science of the stars,In our solar system eight planets circle around the sun. What are they? Can you match the names with the planets? Look at the picture and match the names with the planets.,Warming up,Mercury,Venus,Earth,Mars,Jupiter,Saturn,Uranus,Neptune,金星,地球,水星,土星,木星,天王星,

2、海王星,火星,Pre-reading,The origin of life on the earth is a question that interests astronomers. what do you know about it? Each religion and culture has its own ideas about how life began on earth. What do you know about it?,Do you believe the passage tell you the truth about the beginning of life? Why

3、?,The beginning of the life,Pangu separated Nvwa created God created the sky humans the world,盤古開天,女媧造人,上帝創(chuàng)世論,China legend:Pangu separates the sky from the earth,The development of the life,breath,winds and clouds,voice,thunder,left eye,the sun,right eye,the moon,blood,the rivers,veins,the roads,女 媧

4、 補(bǔ) 天,China legend:The Goddess Nuwa mended the heaven and created human beings from the clay(粘土).,Religious Beliefs,According to Bible , God created the world in seven days.,Day 1: God created Day and Night.,Day 2: God created sky.,Day 3: God created dry landthe earth, and seas.,Day 4:God created tow

5、 great lights(the sun, the moon) and stars.,Day 5: God created living things in the air and sea.,Day 6: God created the land animals and the first man.,Day 7: God rested and called this day Holy.,Reading,How Life Began on the Earth,Reading,Reading,How life began on the earth,Read the text quickly an

6、d write down the main idea for each paragraph.,Task 1: Skimming,While-reading,Main idea of each paragraph,Paragraph 1: Paragraph 2: Paragraph 3: Paragraph 4:,The importance of water for life The development of plants and animals on the earth The formation of the earth A widely accepted theory about

7、the formation of the universe,d,c,a,b,e. The arrival of humans and their impact on the earth,Paragraph 5:,e,Read the paragraph 2 and 3 carefully and think about How the earth come into being?.,Task 2: Close reading,While-reading,1. Big Bang,How did the earth come into being?,Para2,3,The development

8、of life,Para4,5,extremely small plants,First,early shellfish,Stage 1: The development of life in water,all sorts of fish,green plants on land,insects on land,Stage 2: The development of life on land Next,amphibians on land and in the water,Green plants grew into forests Later,reptiles on land,dinosa

9、urs on land,(1) What life developed after forests appeared?,After that,mammals on land,(2) What life developed after dinosaurs?,small clever animals,(3) What life developed after mammals? Finally,Work in pairs. Put the order of developmentof life into a timeline.,Task 3: comprehending,While-reading,

10、10,7,3,8,4,9,6,1,5,2,12,11,1. Insects and amphibians appeared. 3. The earth became a solid ball. 5. Reptiles appeared. 7. The earth was a cloud of dust. 9. Shellfish and other fish appeared. 11. Clever animals with hands and feet appeared.,2. Dinosaurs appeared. 4. Small plants grew on the water. 6.

11、 Plants began to grow on dry land. 8. Water appeared on the earth. 10. The universe began with a Big Bang. 12. Mammals appeared.,1. Why was the earth different from the other planets? Because water remained on the earth. 2. Why did the plants grow before the animals came? Because plants provided oxy

12、gen for animals to breathe. 3. Why is it wrong to show films with dinosaurs and people together? Because dinosaurs died out long before human beings developed on the earth.,4. There used to be nine planets in the solar system. Recently scientists have decided that one of them can no longer be consid

13、ered a planet. Do you know the name of that planet? Do you know why they removed it? The name is Pluto. Scientists now think it is too small to be called a planet. 5. What problem is caused by human beings? Human beings cause global warming.,After the , the earth was just . Slowly, it began to combi

14、ne into moving around the sun. After it exploded loudly, the explosion produced , _ and other gases.,“Big Bang”,a cloud of dust,carbon, nitrogen the water vapour,a solid globe,Retell,As the earth cooled down, _ began to appear on its surface. Because of water and other useful gases, and later _ appe

15、ared.Many millions of years later, began to grow , which led to the appearance of .,water,small plants grew,shellfish and other fish,insects and amphibians,the first plants,on land,When the plants grew into forests, . Later, . When they disappeared, became more important. At last, _ _ have became the most important animals on the planet.,reptiles appeared,dinosaurs developed,mammals,human,beings,Group Discussion,1. What problems are caused by human beings?,2. How to solve these problems?,Homewo