1、必修3Astronomy:the science of the starsUnit 4astronomyastronomersolarsystemsolar systemreligionn.天文学n.天文学家adj.太阳的；日光的n.系统；体系；制度太阳系n.宗教；宗教信仰Words andExpressionsRead after the tape and speak out the Chinese immediately.1.To learn the basic knowledge about solar system2.To get something interesting about
2、 astronomy3.To get more about the origin of the earth4.To arouse the students interest in astronomystarssuper moonthe big bangthe black holeAstronomy is a science that studies celestial objects such as planets,moons,stars,comets,nebulae(星云)&galaxies.Solar SystemWhats this?Do you know anything about
3、the solar system?star 恒星planet 行星Which is a star?Which is a planet?Now watch a piece of video and check your answers.In our solar system eight planetscircle around the sun.1111What are the names of the eight planets that circle around the sun?The Roman goddess of loveThe Roman god of warMercury 水星Ea
4、rth 地球Mars 火星Saturn 土星Neptune 海王星Venus 金星Jupiter 木星Uranus 天王星With the exception of the earth,all of the planets in our solar system have names from Greek or Roman mythology.The Roman god of merchants and travellersThe king of the Roman godsThe Roman god of seeds and sowingThe Greek god of the skyThe
5、 Roman god of the seaMore information about Solar system.What is the eventual fate of the Sun?What determines the surface temperature of a planet?Possible answers:What interests you in astronomy?Do you know any questions that astronomers are interested in?P25 2We can only detect about 5%of the matte
6、r in the universe.The Suns core releases the equivalent of 100 billion nuclear bombs every second.Light from distant stars and galaxies takes so long to reach us that we are actually seeing these objects as they appeared in the past.Shooting stars(流星)really arent stars.They are usually just tiny dus
7、t particles falling through our atmosphere.Even though Mercury is the closest planet to the Sun,temperatures there can reach-280 degrees F on its surface.Earth is the only planet not named after a god.1.How old is the earth?A.About 3.5 billion years B.About 4.5 billion yearsC.About 5.5 billion years
8、 D.About 6.5 billion years2._ of the earth surface is covered by water.A.20%B.30%C.50%D.70%3.What is the total population of humans on the earth?A.About 3.5 billion B.About 4.5 billionC.About 5.5 billion D.About 6.5 billion4.How long does the rotation(自转)of the earth take?A.12 hours B.24 hours C.a m
9、onth D.365 daysLets turn to the Earth the planet we should know well.Now do a quiz to see how much you know about our planet the Earth.5.Which continent is the smallest?A.Africa B.North America C.South America D.Oceania 6.On what day is the Earth day celebrated?A.April 22 B.May 4 C.August 21 D.Novem
10、ber 117.Which ocean is the largest?A.The Pacific Ocean B.The Arctic Ocean C.The Indian Ocean D.The Atlantic Ocean8.Which country has the largest area?A.Canada B.China C.Russia D.U.S.AThe origin of life on earth is a question that interests astronomers.What do you know about it?Each religion and cult
11、ure has its own ideas about how life began on earth.What do you know?P25 1&2Pangu separates the sky from the earth.Nvwa made humans.The Biblical AccountDay 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 sp
12、oke 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.Brahma the Hindu god of creationHe is the creator of
13、the universe and all living beings are said to have evolved from him.平面图 Big BangAccording to the big bang,the universe was created sometime between 10 billion and 20 billion years ago from a cosmic explosion that hurled matter in all directions.Now watch a piece of video and get more information about the big bang.Do you know any interesting astronomical phenomena?Discuss with your group members and choose one of them to make a presentation to the class.TalkHomework1.Look up the new words and expressions of the Reading in the dictionary.2.Preview the Reading:HOW LIFE BEGAN ON THE EARTH
