必修三：Unit4Astronomythescienceofthestars導學案及答案

1、學習必備歡迎下載 高效預習探究案 一Warming up & Pre-reading本節(jié)課學習知識早知道：對于要學的知識做到心中有底， 這樣才能更好的安排自己的學習步驟和學習時間， 愿知識清單能夠更好的幫助你進行自主學習！我們將要學習的學習內容：1. To encourage students to think and talk about astronomy.2. Learn some new words and phrases.能力目標：To develop studentsability of creativity and imagination.To learn to talk

2、 about astronomy in English.語言目標：掌握重點詞匯astronomy, astronomer, solar system, religionTasks:Step 1: Lead-in and warming upGet the students to talk about astronomy, The students can talk freely as they like.1. Are you interested in astronomy? Do you know something about it? Do you know about any famous

3、 astronomers in the word?was the first to suggest that gravity is a force.developed a new idea of gravity and the theory of relativity.is most famous for his work on: black holes.Do you know something about solar system?Solar system is made up ofand the objects that orbit it. These includesand their

4、, as well as asteroids (小行星 ), comets（慧星） , and meteors（流星） .2. How many planets circle around the sun?a. What are they? (according to the order of the distance from the sun)b. There used to be nine planets in the solar system. One of the them can no longer be considered a planet. What s the name of

5、 the planet? Why did scientists remove it?3. Is there life on these planets?Step 2: Think it over1. How old is the universe?2. (1)How did the universe begin? Different religion and culture has different ideas. What do you know?The following notes may be helpful.a. The story of the Hopi people: The F

6、our Creations.學習必備歡迎下載b. From China: The story of Pan Guc. The Jewish / Christian / Muslim story(2) The universe is made up of stars, planets and other matter scattered throughout space. 3 How old is the earth?4. What made it possible for life to develop on the earth?5. Which do you first think exis

7、ted on the earth, plants or animals? 高效預習探究案 二Reading一、熱身問題1. Look at the pictures and the title of the reading passage. Predict what the reading will be about and what will be mentioned in the text?二、速讀課文，回答下列問題1. How did the universe begin?2. When did the dust settle into a solid globe to be the e

8、arth?3. What began to appear on its surface when the earth cooled down after exploding?4. What began to appear on the surface of the water many millions of years later?5. How many years did dinosaurs existed on the earth? When did they disappear?三、精讀課文，回答下列問題1.Put the order of development of life in

9、to a timeline.（ 1） Insects and amphibians appeared.（ 2） Dinosaurs speared.（ 3） The earth became a solid ball（ 4） Small plants grew on the water.（ 5） Reptiles appeared.（ 6） Plants began to grown on dry land.（ 7） The earth was a cold of dust.（ 8） Water appeared on the earth.（ 9） Shellfish and other fi

10、sh appeared.（ 10） The universe began with a: Big Bang.（ 11）Clever animals with hands and feet appeared.學習必備歡迎下載（ 12） Mammals appeared.2、把每個段落與段落大意相搭配Para 1Para 2Para 3Para 4Para 5A. The development of plants and animals on the earth.B. The arrival of humans and their impact on the earth.C. A widely

11、accepted theory about the formation of the universe.D. The importance of water for life.E. The formation of the earth.四、討論1. Why was the earth different from the other planets?2. Why did the plants grow before the animals came?3. What problem is caused by human beings.4. What should we do to deal wi

12、th the problem? Say it out in detail.五、與同桌討論，理解下列長難句并嘗試翻譯成漢語1. What it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe.句子結構分析：what 引導的是從句， what 在此從句中作表語。when 引導的是從句settle into 意為翻譯：2. They were in time to produce carbon, nitrogen, wate

13、r vapour and other gases, which were to make the earths atmosphere.句子結構分析：which 引導的是in time意思是eg: If you keep on, you ll succeed in time.翻譯：3. It was not immediately obvious that water was to be fundamental to the development of life.句子結構分析：that 引導的是be fundamental to從句，對是基本的it是翻譯：4. What many scient

14、ists believe is that the continued presence of water allowed the earth to dissolve harmful gases and acids into the oceans and seas.句子結構分析：what 引導的是從句， what 在此從句中作believe 的that 引導的是從句，且不能略。翻譯：六、課文縮寫According to a widely accepted, the universe began with a“Bing Bang ”After the學習必備歡迎下載“Bing Bang ”, th

15、e earth was still just a cloud of. It didn tsettled into a soliduntilbetween 4.5 and 3.8 billion years ago. The earthloudly with fire and rock. They were in time to produce, many gases, which were to make the earths. When it cooled down, water began to appear on its surface. The life began to.The fi

16、rst extremely small plants appeared on the surface of the water, and thenand filled the oceans and seas with oxygen. It encouraged the deployment of early shellfish and sortsfish. Green plants, land animals, insects began to appear. After that dinosaurs developed andon the earth. Small clever animal

17、s appeared. They aretoo much carbon dioxide into theatmosphere. As a result, the earth may become too hot to live on. So whether life will continue onthe earth willon whether this problem can be solved.學習必備歡迎下載Keys to Unit4 高效預習探究案 一Warming up & Pre-readingStep 1: Lead-in and warming up1. Isaac

18、Newton Albert Einstein Stephen Hawkingthe sunplanetsmoons2.a. eight planets / Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune b. The name is Pluto. Scientists now think it is too small to be called a planet.c. Different answersStep 2: Think it over1. several billion years ago 2.(1) Different answers(2) stars, planets and other matter3 between 4.5 and 3.8 million years ago4. water5. Different answers 高效預習探究案 二Reading二、速讀課文，回答下列問題1. The universe began with a“ Big Bang ” that threw matter in all directions.2. between 4.5 and 3.8 billion years ago.3. water4. the first extremely sm