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单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,Unit 4: Astronomy:,the science of stars,telescope,astronomers,The Milky Way galaxy,1. All living things depend on _ for life.,2. As far as we can see, the _ is the only planet suitable for life to develop. Its about _years old.,3. The sun is about _ the size of the earth.,4. _ is what makes life possible.,5. Where did life first begin On the land or in the ocean,6. Which appear first Plants or animals,7. How many planets are there in the Solar System,A. 6 B. 7 C. 8 D. 9,8. On what day is the Earth Day celebrated,A. April 22 B. May 4,C. August 21 D. November 11,the sun,Free Talk,earth,Water,49,4.5 billion,水星,金星,地球,火星,木星,土星,天王星,海王星,Did an asteroid小行星 kill the dinosaurs and could another kill us,How did life begin on earth,In Chinese culture:,Pangu separated the sky and the earth;,Nvwa made human beings with clay(黏土).,How did life begin on earth,In Indian culture:,Brahman(,婆罗门 ),is the creator of the universe and all living beings are said to have evolved from him.,How did life begin on earth,In Western culture:,God created the world in 7 days.,On the 6th day, he created,humans: Adam and Eve,All began with a “Big Bang (大爆炸),How did life begin on earth,According to a widely accepted theory,Reading,HOW LIFE BEGAN ON THE EARTH,universe,formation,earth,formation,importance,water,development,plants,animals,humans,arrival,influence,Development of,life,Development of,earth,- which makes it possible for life to develop,Development of,earth:,Development of,life:P4-5,1.,After water appeared,_ appeared on the surface of the water, which encouraged the development of _,small plants,shellfish and all sorts of fish,2. Next, _ began to grow on land as well as land animals-insects and _, which can live both on land and in the water.,green plants,amphibians,3.,Later, when plants grew into forests, _ appeared for the first time.,Some huge animals, called _, developed, they produced young by laying eggs.,reptiles,dinosaurs,About 65 million years ago, dinosaurs disappeared, after that, _ became more important.,mammals,came into being and,spread,all over the world.,What life developed after mammals,Humans,They developed new methods of growing food, hunting and moving around.As time went by they covered the earth and have become the most important animals on the planet.,According to the pictures, have a try to retell the development of life.,The earth was just a cloud of dust whose future is _ after the “Big Bang. Then the dust began to settle into a _ ball which is so _ and _ loudly with fire and rock, to be in time to produce many things, which made the earths _. As the earth cooled down, _ began to appear and people think it is important for the beginning of life. It allowed the earth to dissolve _ gases. Then life began to develop.,uncertain,solid,violent,exploded,atmosphere,water,harmful,I felt lonely and life was dull at that time., ,Nobody understood plants were the start of changes. They _ and filled the first oceans and seas with oxygen. This encouraged the _ of early shellfish and fish. Land animals such as insects, amphibians, reptiles and dinosaurs and so on _ after the first green plants appeared. Dinosaurs disappeared, which made possible the rise of _ on the earth. Then small clever animals _ all over the earth.,multiplied,development,spread,With so many friends on me, I was happy.,followed,mammals,Humans developed new _ of growing, hunting and moving around. As time went by they covered the earth. Now _ carbon dioxide has been putting into the _, which _ heat_ escaping from the earth into space. As a result, the problem of _ occurs. Whether life will continue on the earth for millions of years to come will _ whether this problem can be solved.,means,from,prevents,Now, I m worried about the future of myself and humans,depend on,too much,atmosphere,global warming,They are making the world,better,.,They are making the world,worse,.,A,B,Discussion,As a student, what little things can we do for the earth,to prevent the earth from getting hotter and hotter,to slow down the problem getting worse,solar energy,plant trees,recycle rubbish,prevent desertification,save water,purify air,What can we do take care of the earth,Man has but one earth!,To save the earth is to save man himself!,our,home,P1:A widely accepted theoryabout the formation of the universe,No one knows,as,.so long ago.,According to a widely,accepted,theory,begin with,in all directions,After that, atoms .form and combine to,P2:The formation of the earth,For several billion years,after,the earth.a cloud of dust,Between 4.5 and 3.8 billion years,ago,settle,into a solid globe,so,violent,that,explode,within time to produce,which,were to make,As,cool down, .appear on its surface,P3: Waters importance,but,disappear on other planets like mars,It was,not immediately,obvious that,be,fundamental to,.,What,many scientists believe is,that, allowed the earth to,dissolve harmful gases and acid into,A chain reaction,which,.,P4: The development of plants and animals on the earth,Many million of years,later, the first extremely small plants.,which,encouraged.,Next, green plants.on land,followed by,.,Later,when,the plants grew into forests,.,for the first time,.,After that,Lay eggs/exist,for 140 million years,However,.,Why,they suddenly disappeared,made possible,.mammals,Give birth to,.produce milk to feed.,P5: The arrival of humans and their impact on the earth,Finally about 2.6 million years ago some small clever animals all over the earth,Thus,.the most important animals,But,.put too much carbon dioxide intowhich,preventsfrom,.,As a result of,this, too hot to live on,So whether,life will continue on the earth for million of years to come will,depend on,Homework,Collect more information about the development of life and make a poster with your group members.,2. Read and retell the passage to learn the important and difficult language points.,As the result of Big Bang, the violent earth slowly settled into a globe _1,_,around the sun. The gases which were to make the earths,2 _,came into being,from the explosion of the dust ball,with,water,3,(follow) them while the earth,cooled down,. It allowed the beginning for life. Many millions of years,4, the first,5,(极度的) small plants began to appear,6,the surface of the water,7,(繁殖) and filling the sea and oceans,moving,atmosphere,following,later,extremely,on,multiplying,which encouraged the later development of early shellfish and all sorts of fish. As time passed, green plants taking carbon dioxide and producing 8 氧气came to land and grew into forest. Later the chains of lives continued, such as insects, amphibians, reptiles, dinosaurs and mammals, the typical of 9 is human being. They dont only do 10 to the earth but cause damage to it.,oxygen,which,good,
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