1、WELCOME TO MY ENGLISH WORLD !,Step 1 Lead in,Look at two pictures , try to give as much information as possible.,Unit4 Astronomy: thescience of the stars,Step 2 Warming up,Do you know how many planets circle around the sun in our solar system ? What are they? Can you match the names with the planets
2、?,Jupiter,Uranus,Neptune,Saturn,Mercury,Mars,Earth,Venus,水星,金星,地球,火星,木星,土星,天王星,海王星,Step 3 A quiz,Whats the end of the world ?Its “ D ”.Whats the beginning of the world?Its “ W ”.,Step 4 Pre-reading,Each religion and culture has its own ideas about how life began on earth. What do you know ? In China
3、, we all know that Pangu separates the sky from the earth. The Goddess Nvwa mended the heaven and created human beings. In western culture, God created the world in six days.,Pangu separates the sky from the earth.,Nvwa makes human beings.,God created man.,上帝造人,What is the passage about?,Step 5 Read
4、ing,How life began on the earth.,While-reading,Task 1 Listen and match,Listen to the tape of the reading passage and match the main idea for each paragraph.,Main idea of each paragraph,The importance of water for life The development of plants and animals on the earth The formation of the earth d. A
5、 widely accepted theory about the formation of the universe,d,c,a,b,e. The arrival of humans and their impact on the earth,Paragraph 5:,Paragraph 1:Paragraph 2: Paragraph 3: Paragraph 4:,e,While-reading,Task 2: Scanning,Work in pairs. Put the order of developmentof life into a timeline according to
6、the reading passage.,Put the order of development of life into a time line.Insects and amphibians appeared.The earth became a solid ball.Reptiles appeared.The earth was a cloud of dust.Shellfish and other fish appearedDinosaurs appeared. Small plants grew on the water.Plants began to grow on dry lan
7、d.Water appeared on the earth.Mammals (including humans )appeared.,D,B,I,G,E,H,A,C,F,J,While-reading,Task 3: Close reading,Think about what you have read and make choices.,Why was the earth different from other planets?A It produced a lot of heat. B.The water remained.C Water disappeared. D.It was t
8、he oldest planet.,Why was life able to develop on the earth but not on other planets?A The earth had a solid shape. B. The earth did not have harmful gases in its atmosphere.C The water stayed on the earth but not on other planets. D.The earth was not too hot and not too cold.,精品课件,Why did the plant
9、s grow before animals came?,A Animals needed plants to protect them from the sun. B Plants provided oxygen for animals to breathe.C Animals could hide from hunters in forest.D It was easier for plants to grow.,What problem is caused by human beings?,A They exist everywhere on the earth.B They cause
10、global warming.C They find new methods of growing crops.D They enjoy hunting and fishing.,精品课件,Step 6 Looking and thinking,Look at the following pictures and try to understand more of the reading passage.,A cloud of dust,A solid globe,Explode,atmosphere,water,Cells separate,Plants in the water,Early
11、 shellfish and fish,Plants on land,oxygen,Insects and amphibians,Reptiles,Dinosaurs,Mammals,Man had evolved from apes.,The development of life,As a student, what little things can we do for the earth?,Step 7 Discussion,to prevent the earth from getting hotter and hotter to slow down the problem gett
12、ing worse ,We have only one earth!,We should take care of the earth!,精品课件,Whether life will continue on the earth depends on human beings.,Only if we care will we help,only if we help shall all be saved!,Step 8 Homework,1.Read aloud the reading passage and underline the useful phrases and sentence p
13、atterns.2.Finish off Ex1and Ex2 on P. 28.,goodbye,Step 5 Summing up,How life began on the earth,1. small plants in water,2. shellfish and all sorts of fish,3. green plants on land,4. Insects (on land)5. amphibians (on land and in water),6. forests,7. Reptiles (on land)8. Dinosaurs (on land) 9. Mamma
14、ls (on land),10. small clever animals with hands and feet,11. humans,What subjects do you learn at school?,ChineseEnglish mathematicsphysicshistory,geographyphysicsbiologychemistry,brainstorming,geophysics,biochemistry,Task 3: Careful reading,1. What was there on the earth before life could begin? W
15、ater vapour, carbon dioxide, oxygen, nitrogen and other gases. 2. Why do scientists think there has never been life on the moon? Because there is no water on the moon. 3. Why did animals first appear in the seas? Because water allowed the earth to dissolve harmful gases into the oceans and seas.,4.
16、Why did green plants help life to develop? Because green plants can take carbon dioxide from the atmosphere and fill the air with oxygen. 5. Why were mammals different from other animals? They were different because they produced their young from within their bodies. 6. How did water come into being
17、 on the earth? The explosion of the earth produced water vapor, which turned into water when the earth cooled down.,Water Air Life,is the headspring of life.,?,How Life Began on the Earth,Water,_made it possible for life to begin to develop.,Water,Plants encouraged the development of _.,early shellf
18、ish and all sorts of fish,Later _ appeared.,land animals,insects,amphibians,When plants grew into forests, _ appeared for the first time.,reptiles,Some huge animals, called _, developed.,dinosaurs,When dinosaurs disappeared, _ became more important.,mammals,came into being and spread all over the world.,What life developed after mammals?,Humans,
