人教版高中英语必修三unit4-reading(公开课)

1、,the science of the stars,Unit 4 Astronomy,Astronomy ?,Are you interested in,Step 1,A quiz on astronomy,3. Earth is the only planet moving around the sun.,Part 1: True or False,The earth moves around the sun.,T,F,2. It takes the earth one day to move around the sun.,4. There is atmosphere on the moo

2、n.,5. The earth is the only planet in the solar system which has living creatures.,a year,8 planets,no,F,F,T,Mercury 水星,Venus 金星,Earth 地球,Mars 火星,Jupiter 木星,Saturn 土星,Uranus 天王星,Neptune 海王星,Do you know how the universe began according to chinese culture ? In China, we all know that Pangu separates t

3、he sky from the earth.,Lets brainstorm the following questions,Chinese Legends (传说),Pangu separated the sky from the earth. His whole body then turned into all kinds of things in the universe.,盘古开天辟地,2.Try to put the right order of development of life on the earth? ? ? If you want to know more, plea

4、se turn to Page 25,Look at title and the pictures. Can you get some information about what we will learn from the text ?,Big bang ?,The evolution(development) of life on the earth ?,The text may tell us the _ of the earth and the _ of life on it.,How life begin on the earth,Pre-reading,Pre-reading,H

5、ow life began on the Earth,Fast reading,Match the main idea with each paragraphy.,Para. 1 The formation(形成) of the earth. Para. 2 The importance of water for life. Para. 3 A widely accepted theory about the formation of the universe. Para. 4 The arrival of humans and their impact on the earth. Para.

6、 5 The development of plants and animals on the earth.,Careful reading,Task one (para 1),What is the widely accepted theory in Para 1?,The universe began with a Big Bang that throw matters.bodies.,a cloud of _,Big Bang,a solid _,slowly combine,the earth _ down,it exploded loudly with _ and _,the ear

7、ths _,dust,ball/globe,fire rock,atmosphere,cooled,How did the earth come into being(产生）?,Task two (para 2),Why is water so important for the beginning of life?,？,paragraph3,dissolve harmful gases and acids into the oceans and seas.,Because water allowed the earth to ,What life developed after water

8、appeared?,Paragraph4,small plants,green plants,forest,early shellfish and all sorts of fish,insects and amphibians,reptiles,dinosaurs,mammals,About 2.6 million years ago,Now,Humans produce too much carbon dioxide , making the earth too hot to live in.,Para 5,After the clever animals (humans) became

9、important on the earth, what happened?,Answer question,1,2,3,4,5,6,7,Lets check whether we put the right order at first. Are you right?,Task three,Please read the text again, then put the order of these sentences. ( exercise 2, page 27), Insects and amphibians appeared The earth became a solid ball

10、Reptiles appeared. The earth was a cloud of dust. Shellfish and other fish appeared. Clever animals with hands and feet appeared., Dinosaurs appeared. Small plants grew on the water. Plants began to grew on the earth. Water appeared on the earth. The universe begin with a “big bang” Mammals appeared

11、.,Big Bang,4.5-3.8 billion,many million years later,2.6 million,Now,Time,Events,Big Bang,dust,solid globe,water appears,small plants,shellfish and fish,plants grow on the land,insects and amphibians,reptiles,dinosaur,mammals,clever animals,humans,life,earth,Sum up,The text may tell us the _ of the e

12、arth and after _ appear, the _ of life one after another on it.,formation,water,development,In the last paragraph, we know humans face seriously global warming problem, which is threatening our existence. Can you write something to call on us to protect our environment ?,Discussion,The earth we live

13、 in is becoming more and more terrible, so we must take measures to deal with it Firstly: Secondly: Thirdly: We hope the environment will become more and more beautiful.,Sample,The earth we live in is becoming more and more terrible, so we must take measures to deal with it Firstly, the government should pass laws to prevent people and factories from polluting the environment. Secondly, everyone should realize the importance of the problem and try their best to protect the environment and fight against pollution. Besides, its a good ideas to plant trees t