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 inStep 1A quiz on astronomy3. Earth is the only planet moving around the sun.Part 1: True or False1. The earth moves around the sun.TF2. It takes the earth one day to move around the sun.4. There is atmosphere on the moon.5. The

2、 earth is the only planet in the solar system which has living creatures.a year8 planets noFFTMercury 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1. Do you know how the universe began according to chinese culture ? In China, we all know that Pangu separates the sky from the earth.Le

3、ts brainstorm the following questionsChinese Legends (传说传说) 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, please turn to Page 25Look

4、 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-readingPre-reading Fast reading Match the main

5、idea with each paragraphy.Para. 1 The formation(形成形成) 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. 5 The development of plants and animals on the earth. Ca

6、reful 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 Banga solid _slowly combinethe earth _ downit exploded loudly with _ and _the earths _dustball/globefire rockatmospherecooledHow did the earth com

7、e into being(产生）?Task two (para 2) Why is water so important for the beginning of life? paragraph3dissolve harmful gases and acids into the oceans and seas.Because water allowed the earth to What life developed after water appeared?Paragraph4 small plantsgreen plants forestearly shellfish and all so

8、rts of fishinsects and amphibians reptilesdinosaursmammalsAbout 2.6 million years agoNowHumans produce too much carbon dioxide , making the earth too hot to live in.Para 5 After the clever animals (humans) became important on the earth, what happened?Answer question 1234567Lets check whether we put

9、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 Reptiles appeared. The earth was a cloud of dust. Shellfish and other fish appeared. Clever anima

10、ls 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.Big Bang4.5-3.8 billionmany million years later 2.6 millionNow Time Events Big Bangdust solid glo

11、bewater appearssmall plantsshellfish and fishplants grow on the landinsects and amphibians reptiles dinosaur mammals clever animalshumans life earth Sum up The text may tell us the _ of the earth and after _ appear, the _ of life one after another on it. formation water developmentIn the last paragr

12、aph, 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 in is becoming more and more terrible, so we must take measures to deal with it Firstly: Secondly: Thirdly: We

13、 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 to i