必修三Unit4Astronomythescienceofthestars导学案及答案

1、高效预习探究案一Warming up & Pre-reading本节课学习知识早知道：对于要学的知识做到心中有底，这样才能更好的安排自己的学习步骤和学习时间，愿知识清单能够更好的帮助你进行自主学习！我们将要学习的学习内容：1. To encourage students to think and talk about astronomy.2. Learn some new words and phrases.能力目标：To develop students ability of creativity and imagination.To learn to talk about astr

2、onomy in English.语言目标：掌握重点词汇astronomy, astronomer, solar system, religion Tasks: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 astronomer

3、s 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 of and the objects that orbit it. These includes and their , as

4、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. Whats the name of the plan

5、et? 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 Four Crea

6、tions.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 existed on the ear

7、th, plants or animals?高效预习探究案二Reading一、热身问题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、速读课文，回答下列问题1. How did the universe begin? 2. When did the dust settle into a solid globe to be the earth?3. What be

8、gan 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、精读课文，回答下列问题1.Put the order of development of life into a timeline.

9、（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 fish appeared.（10）The universe be

10、gan with a: Big Bang.（11）Clever animals with hands and feet appeared.（12）Mammals appeared.2、把每个段落与段落大意相搭配Para 1 A. The development of plants and animals on the earth.Para 2 B. The arrival of humans and their impact on the earth.Para 3 C. A widely accepted theory about the formation of the universe.P

11、ara 4D. The importance of water for life.Para 5 E. The formation of the earth.四、讨论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 with the problem? Say it out in detail.五、与

12、同桌讨论，理解下列长难句并尝试翻译成汉语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.句子结构分析：what 引导的是 从句，what在此从句中作表语。when 引导的是 从句settle into意为 翻译：2. They were in time to produce carbon, nitrogen, water vapour and other gases, which were to

13、make the earths atmosphere.句子结构分析：which 引导的是in time 意思是eg: If you keep on, youll succeed in time.翻译：3. It was not immediately obvious that water was to be fundamental to the development of life.句子结构分析：that 引导的是 从句，it是 be fundamental to 对是基本的翻译：4. What many scientists believe is that the continued pr

14、esence of water allowed the earth to dissolve harmful gases and acids into the oceans and seas.句子结构分析：what引导的是 从句，what 在此从句中作believe的that引导的是 从句，且不能略。翻译：六、课文缩写According to a widely accepted , the universe began with a “Bing Bang” After the “Bing Bang”, the earth was still just a cloud of . It didnt

15、settled into a solid until between 4.5 and 3.8 billion years ago. The earth loudly 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 first extremely small plants appeared on

16、the surface of the water, and then and filled the oceans and seas with oxygen. It encouraged the deployment of early shellfish and sorts fish. Green plants, land animals, insects began to appear. After that dinosaurs developed and on the earth. Small clever animals appeared. They are too much carbon

17、 dioxide into the atmosphere. As a result, the earth may become too hot to live on. So whether life will continue on the earth will on whether this problem can be solved.Keys to Unit4 高效预习探究案一Warming up & Pre-readingStep 1: Lead-in and warming up1. Isaac Newton Albert Einstein Stephen Hawking th

18、e sun planets moons 2.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 ago2.(1) Different answers(2) stars, planets and o

19、ther matter 3 between 4.5 and 3.8 million years ago4. water5. Different answers 高效预习探究案二Reading二、速读课文，回答下列问题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 small plants.5. for more than 14 million year