1、Astronomy: the science of the stars,Unit 4,How Life Began on the Earth,Period 1,What are the names of the eight planets that circle our sun?,How Life Began on the Earth,Period 1,eight planets many comets other objects,The Solar system,地球 _ 木星 _ 火星 _ 水星 _ 海王星 _,F. 土星 _ G. 天王星 _ H. 金星 _,Earth,Jupiter,

2、Mars,Mercury,Neptune,Saturn,Uranus,Venus,The Solar System,Can you name the eight planets?,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,Quiz:,1.Who wrote the book The Origin of Species (物種起源) ? A.Issaac Newton B .Albert Einstein C. Charles Darwin,2. How many big pl

3、anets are there in the Solar System? A . 7 B .8 C. 9,3. Which one belongs to amphibian(兩棲物）? A .frog B. snake C .dinosaur,4. Which one belongs to reptile（爬行物）? A. fish B .snake C .bird,7. On which planet are there lives at present ? A. the Venus B .the Earth C. the Mars,6. Which gas is the most impo

4、rtant for life? A. carbon dioxide (CO2 ) B. oxygen(O2) C. nitrogen (N2),5. Which one belongs to mammal （哺乳動物）? A. dinosaur B. dog C. fish,Do you know each religion or culture has its own ideas about the origin of the universe or life?,Pre-reading,Big Bang,Chinese Legends (傳說),Pangu separates the sky

5、 from the earth. His whole body then turns into all kinds of things in the universe.,Pangu separates the sky from the earth.,Nvwa makes human beings.,According to Bible (圣經(jīng)), God created the world and the first man, Adam (亞當(dāng)) and the first woman, Eve (夏娃).,God created the world in seven days.,Religi

6、ous Beliefs,God created the world in 6 days,Scientific Theories,Reading How life began on the earth?,Fast reading,1.What was fundamental to the development of life ? 2.When did some clever animals appread on the earth?,Para3 water,Para5 2.6million years ago,Para.1 Para.2 Para.3 Para.4 Para.5,A_ abou

7、t how the universe was formed,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,Careful-reading,Before life appeared.,Different lives developed.,Paragraph 1:,1. A widely accepted theory w

8、as put up with. What is it?,The universe began with a “Big Bang” that threw matter inall directions. After that, atoms began to form and combine to create stars.,water,Plants in the water,Shellfish and fish,Insects and amphibians,Reptiles,Dinosaurs,Mammals,Plants on land,（ ）A Insects and amphibians

9、appeared. （ ）B Dinosaurs appeared. （ ）C The earth became a solid ball. （ ）D Small plants grew on the water. （ ）E Reptiles appeared. （ ）F Plants began to grow on dry land. （ ）G The earth was a cloud of dust. （ ）H Water appeared on the earth. （ ）I Shellfish and other fish appeared. （ ）J The universe b

10、egan with a “Big Bang”. （ ）K Clever animals with hands and feet appeared. （ ）L Mammals appeared.,5,10,6,2,9,4,8,3,7,1,Put the order of development of life into a time line.,12,11,Post reading,True (T) or False (F).,1. The earth appeared before the Big Bang happened. 2. The original atmosphere consis

11、ted of nitrogen and oxygen. 3. The main difference between the earth and other planets is that there is water on the earth. 4. Life began in water and then on land.,F,F,T,T,summary,After the “Big Bang”, the earth was just a cloud of _. It _ loudly with fire and rock, which were in time to produce th

12、e water _, carbon dioxide and other gases. Then small plants grew. They multiplied and _ the oceans and seas with oxygen. Many millions of years later the first green plants began to _ on land. When the plants grew into forests, _ appeared for the first time. They produced young generally by _ eggs.

13、,when dinosaurs disappeared, _ became more important. Now small clever animals with _ appeared and _ all over the world. As time went by they covered the earth and they are putting too much carbon dioxide into the _, which _ heat _ the earth into space. Whether life will continue on earth for millio

14、ns of years to come will _ whether this problem can be solved.,What problems have been caused by humans to the earth?,Discussion,solar energy,plant trees,recycle rubbish,prevent desertification,save water,clean air,What can we do take care of the earth?,Greenhouse effect,(2) But they are not taking care of the earth very well. What problem a