1、Unit 4 Astronomy: the science of the stars,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.,astronomer,solar system,eight planets many comets other objects,What are the English names of the eight planets that cir

2、cle our sun?,solar system,Mercury,Mars,Venus,Saturn,Jupiter,Neptune,Uranus,Earth,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,Pluto,Pre-reading,2. Each religion and culture has its own ideas about how life began on earth. What do you know? In China, we all know th

3、at Pangu separates the sky from the earth.,Pangu separates the sky from the earth,中國神話傳說中有盤古開天劈地的說法。巨人盤古用一把利斧劈開混沌,將天地分開。死后,他的氣息化成風和云,聲音變成轟轟的雷聲,左眼化為太陽,右眼化為月亮,手足與四肢變成大地的四極與五方的名山,血液化成江河,筋脈鋪成道路,肌肉形成田地,須發(fā)成為星星,牙齒和骨骼化為金屬、珍珠、玉石,汗水成為滋潤萬物生長的甘霖和雨露。,Other legends about the beginning of universe,The Biblical Acc

4、ount,Day 1: God spoke and separated light from darkness creating Day and Night Day 2: God spoke and separated the water 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 D

5、ay 6: God spoke and created the land animals and man Day 7: God rested and blessed this day calling it Holy,How Life Began on the Earth,The Big Bang,Para.1 Para.2 Para.3 Para.4 Para.5,Awidely accepted _ about how the universe was formed,The _ of the earth,The importance of _ for life,The_ of plants

6、and animals on the earth,The arrival of _ and their impact on the earth,theory,formation,water,development,humans,How life began on the earth,Before life appeared.,Different lives developed.,Part1 (para13) Before life appeared,According to a widely accepted theory, how did the stars form? How did th

7、e earths atmosphere form? Why was the earth different from the other planets? What a role the water played in the development of life?,1. According to a widely accepted theory, how did the stars form? 2. How did the earths atmosphere form?,The universe began with a “Big Bang” that threw matter in al

8、l directions, then atoms began to form and combine to create stars.,The earth was so violent. It exploded loudly with fore and rock to produce carbon, nitrogen, water vapor and other gases, which were to make the atmosphere.,3. Why was the earth different from the other planets? 4. What a role the w

9、ater played in the development of life?,Because the water on other planets had disappeared later.,The presence of water allowed the earth to dissolve harmful gases and acids into the oceans and seas. This produce a chain reaction which made it possible for life to develop,Part2 (para45) How the life

10、 developed,1.Make a timeline of the development of life 2.Why did the plants grow before the animals came? 3.Why is it wrong in films and stories to show dinosaurs and people together?,1.,2.,3.,4.,5.,6 .,small plants On surface of water,Early shellfish and all sorts of fish,green plants on land,land

11、 animals,insects (on land) amphibian (on land and in water),Mammals- clever animals,forests reptiles (huge animal-dinosaurs),3. Why is it wrong in films and stories to show dinosaurs and people together?,2.Why did the plants grow before the animals came?,Because plants provide oxygen for animals to

12、breathe.,Because dinosaurs died out long before human beings developed on the earth.,A cloud of dust a solid ball presence of water on the water shellfish & other fish plants begin to grow on dry land insects and amphibians appear retiles appear dinosaurs appear mammals appear,The development of life,insects and amphibians appear,reptiles appear,dinosaurs appear,mammals