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1、Unit 4 Astronomy: the science of the stars,人教新课标必修三,贵州省思南中学 许义怀 编制,Astronomy is the scientific study of the universe and the heaven bodies (such as the sun, the moon, and stars), gas, and dust within it.,What is Astronomy?,Warming up,In our solar system eight planets circle around the sun. What are
2、they? Can you match the names with the planets?,海王星 Neptune,水星 Mercury,金星 Venus,地球 Earth,火星 Mars,木星 Jupiter,土星 Saturn,天王星 Uranus,What interests you in astronomy? Do you know any questions that astronomers are interested in?,How did life begin on Earth?,How was the universe formed?,1. The origin of l
3、ife on earth is a question that interests astronomers. What do you know about it? How old is the universe? (several billion years ago) How old is the Earth? (between 4.5 and 3.8 billion years ago) Which were the first creatures or plants on Earth?.,Pre-reading,2. Each religion and culture has its ow
4、n ideas about how life began on earth. What do you know? In China, we all know that Pangu separates the sky from the earth and Nuwa made humans.,Chinese Legends (传说),Pangu separates the sky from the earth. His whole body then turns into all kinds of things in the universe.,Pangu separates the sky fr
5、om the earth,中国神话传说中有盘古开天地的说法。巨人盘古用一把利斧劈开混沌,将天地分开。死后,他的气息化成风和云,声音变成轰轰的雷声,左眼化为太阳,右眼化为月亮,手足与四肢变成大地的四极与五方的名山,血液化成江河,筋脉铺成道路,肌肉形成田地,须发成为星星,牙齿和骨骼化为金属、珍珠、玉石,汗水成为滋润万物生长的甘霖和雨露。,Other legends about the beginning of universe,In Bible, God created the world. Then the God created the first man and the first woma
6、n Adam and Eva.(亚当和夏娃),Religious Beliefs,God created the world in seven days.,Nuwa made human beings,女 娲 补 天,The Biblical Account,According to Bible , God created the world in seven days. Day 1: God spoke and separated light from darkness creating Day and Night Day 2: God spoke and separated the wat
7、er creating sky and ocean Day 3: God spoke and created dry land,Day 4: God spoke and created the sun, moon and stars Day 5: God spoke and created living creatures in the air and sea Day 6: God spoke and created the land animals and man Day 7: God rested and blessed this day calling it Holy,India,Bra
8、hma is the god first represented in the Hindu Triad. He is the creator of the universe and all living beings are said to have evolved from him.,Prediction,Look at the pictures. Do you know the topic of this unit?,HOW LIFE BEGAN ON THE EARTH,Reading,1. When did the “Big Bang” happen? It happened seve
9、ral billion years ago.,Scanning,Read the passage quickly and answer the questions.,2. What form was the earth after the “Big Bang”? The earth was still just a cloud of dust. 3. What made up the earths atmosphere after the earth exploded? Carbon, nitrogen, water vapour and other gases.,4. How did wat
10、er come into being on the earth? As the earth cooled down after it exploded, water came into being.,5. Whats the significance of the presence of water on the earth? It allowed the earth to dissolve harmful gases and acids into the oceans and seas.,6. What was important to the development of fish? ox
11、ygen. 7. What made possible the rise of mammals on the earth? The disappearance of dinosaurs made the possible the rise of mammals on the earth.,8. Why are mammals different from all life forms in the past? They gave birth to young baby animals and produced milk to feed them.,Careful reading,Read th
12、e passage carefully and match the main idea with each paragraph.,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. 5 The developme
13、nt of plants and animals on the earth.,Fill in the blanks in the following form.,Atoms,Careful reading,violent,atmosphere,presence,acids,oxygen,shellfish,amphibians,Reptiles,existed,gave birth to,clever,dioxide,True (T) or False (F). 1. The earth appeared before the Big Bang happened. 2. The origina
14、l atmosphere consisted 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,5. Mammals appeared before the development of dinosaurs. 6. Dinosaurs could give birth to young baby animals
15、 and produced milk to feed them. 7. Human beings produce too much carbon dioxide which causes the global warming on the earth. 8. According to the text, human beings would disappear in the end.,F,F,T,F,How life began on the earth.,“Big Bang”,other bodies,_,stars,Earth: a cloud of _,atoms,dust,Summar
16、y,a solid _,the earths _,other _,Water: _ to the development of life,water vapour,nitrogen,carbon,extremely small _ on the surface of the water,globe,gases,atmosphere,fundamental,plants,early _ and all sorts of fish,green plants on land,land animals,insects,amphibians,_,huge animals (dinosaurs),the rise of _,human beings,shellfish,reptiles
