Module III Unit 41.Whats the meaning of the word “Astronomy”?I. Warming upl行星the science of stars;2. Do you know the following terms?star, planet, the sun / moon / earth, solar system太阳系 3. How many planets are in the solarsystem?恒星Scientists now think Pluto is too small to be called a planet.4. Do you know the correct order of their distance to the sun?nearest tothe sun?farthest to the sun?5. The names of eight planets. Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune1) 水星 2) 金星 3) 地球 4) 火星 5) 木星 6) 土星 7) 天王星 8) 海王星In this unit, well learn something more scientific. 1.Whats the title of the text?2. From the title, we can predict that the text may tell us the origin of life on the earth. Do you know some stories about it?Pangu separates the sky from the earth.Nvwa made humans.Phrases and Useful Expressions circle around 绕转 according to 根据 a widely accepted theory 熟知的理论 in all directions 向着四面八方 in time 及时；终于 cool down 冷却 be fundamental to 对关键 a chain action 连锁反应 make it possible forto do使可能 give birth to 生育;产生 11. prevent from 阻止做 12. millions of years to come 未来的几百万年1. When did the “Big Bang” happen?Read the passage quickly and answer the questions.2. What form was the earth after the “Big Bang”? 3. What made up the earths atmosphere after the earth exploded?4. How did water come into being on the earth?5. Whats the significance of the presence of water on the earth?6.What was important to the development of fish? 7. What made possible the rise of mammals on the earth?8. Why are mammals different from all life forms in the past?1. When did the “Big Bang” happen?It happened several billion years ago.Scanni ng 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 water 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?oxygen. 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.Close readingI. Read the 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 development of plants and animals on the earth.Detailed readingStage 1 : The development of the earthStage 2 : The development of life(para 13)(para 45)Stage 1: The development of the earth(1) After the Big Bang, what was the earth like?a cloud of dust a solid globe exploded with fire and rockproduced water vapour and gases(2) What happened next?(3) What did the water vapour and gases form?the earths atmosphereWater appeared(4) What appeared as the earth cooled down?water is important for the beginning of life on the earth. Why is water so important for the beginning of life?Because water allowed the earth to dissolve harmful gases into oceans and seas.Stage2 The development of lifesmall plants appears in water1.What life developed after water appeared?Shellfish and all sorts of fish2.What life developed in water next?green plants began to grow on landinsects appeared3.What about the life on land?amphibians on land and in the waterforests4. What life developed next on land?reptiles appeareddinosaur developed5.What life developed after forests appeared?mammals on land6.What life developed after dinosaurs?small clever animals7. What life developed after mammals?1.Who are the small clever animals with hands and feet? 2. Are they taking care of the earth well? Why? Because they are putting too much carbon dioxide into the atmosphere, which prevents heat from escaping from the earth into space.The earth may become too hot to live on .1. Insects and amphibians appeared. 3. The earth became a solid ball. 5. Reptiles appeared. 7. The earth was a cloud of dust 9. Shellfish and other fish appeared. 11. Clever animals with hands and feet appeared2. Dinosaurs appeared.4.Small plants grew on the water. 6. Plants began to grow on dry land. 8. Water appeared on the earth 10. The universe began with a “Big Band”. 12. Mammals appeared.831091151741262Can you put the order of development of life into a time line?Ex.2 on P27III. Fill in the blanks in the followi