1、Astronomy: the science of the starsUnit 4What subjects do you learn at school?ChineseEnglish mathematicsphysicschemistry biologygeography politicshistoryphysicschemistrybiologygeographymathematicsMedicineBiochemistryGeologyAstronomyScience subjectsFrontier scienceAstronomy is the scientific study of

2、 the universe and the heaven bodies (such as the sun, the moon, and stars), gas, and dust within it. astronomerWhat 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? BrainstormingDo you know each religion

3、 or culture has its own ideas about the origin of the universe or life? Chinese Legends (傳說(shuō)) Pangu separates the sky from the earth.His whole body then turns into all kinds of things in the universe.The development of the lifebreathwinds and cloudsvoicethunderleft eyethe sunright eyethe moonbloodthe

4、 riversveins（靜脈）the roads女?huà)z補(bǔ)天Nuwa makes human beingsAccording to Bible (圣經(jīng)), God created the world and the first man, Adam (亞當(dāng)) and the first woman, Eve (夏娃). God created the world in seven days.Religious Beliefs Day 1: God spoke and separated light from darkness, creating Day and Night.Day 2: God s

5、poke and separated the water creating sky and ocean.Day 3: God spoke and created dry land.Day 4: God spoke and created the sun, the moon and stars.Day 5: God spoke and created living things in the air and sea.Day 6: God spoke and created the land animals and the first man.Day 7: God rested and calle

6、d this day Holy.Scientific Theories Famous scientists such as Newton, Einstein and Stephen Hawking had their own theory about the origin of the universe.The universe began from the Big Bang. Life first began in the sea on the earth. Life was brought to the earth by ET from outer space. Life came fro

7、m a comet which hit the earth. Read the passage quickly to find the main idea of each paragraph.4.Choose the main idea for each paragraph( )The arrival of humans and their impact on the earth.( )The formation of the earth.( )The development of plants and animals on the earth.( )A widely accepted the

8、ory about the formation of the universe.( )The importance of water for life.54213（ ）A Insects and amphibians appeared.（ ）B Dinosaurs appeared.（ ）C The earth became a solid ball.（ ）D Small plants grew on the water. （ ）E Reptiles appeared.（ ）F Plants began to grow on dry land.（ ）G The earth was a clou

9、d of dust.（ ）H Water appeared on the earth.（ I Shellfish and other fish appeared.（ ）J The universe began with a “Big Bang”.（ ）K Clever animals with hands and feet appeared.（ ）L Mammals apeared.5106）2948371 ScanningPut the order of development of life into a time line. 12 11 Detailed ReadingThe devel

10、opment of the earthStage 1: The development of the earth(1) After the Big Bang, what happened? a cloud of dust a violent solid ball exploded with fire and rock produced carbon dioxide ,nitrogen water vapour andother gases(2) What happened next?(3) What did the water vapour and gases form?the earths

11、atmosphereWater appeared which is important for the beginning of life on the earth. (4) What appeared on the earth then?(5) What did the water form?oceans and seas1. Big Bang (a huge explosion around 15 billion years ago)2. a cloud of energetic dust3. a ball moving around the sun4. exploded with fir

12、e and rock5. produce the water vapour, carbon dioxideHow did the earth come into being?6. cooled down7. water appeared8. harmful gases were dissolvedThe development of lifearrival of small plants in water What life developed after water appeared?early shellfishStage 2: The development of life in wat

13、erall sorts of fish(2) What life developed in water next? green plants on land insects on land(3) What life developed after the life in water?amphibians on land and in the waterforestsStage 3: The development of life on land(1) What life developed next on land? reptiles on land dinosaurs on land(2)

14、What life developed after forests appeared?mammals on land(3) What life developed after dinosaurs? small clever animals(4) What life developed after mammals?Looking and thinking Look at the following pictures and try to understand more of the reading passage.A cloud of dustA solid globe Explode atmo

15、sphere waterCells separatePlants in the waterEarly shellfish and fishPlants on landoxygenInsects and amphibiansReptiles Dinosaurs Mammals Text Retelling The explosion of the earth produced_ _, which turned into water when the earth cooled down. Water allowed the earth to _ harmful gases into the oce

16、ans and seas. That made it possible for _ to begin to develop. The arrival of small _ encouraged the development of early _ and all sorts of fish. Many millions of years later the first green plants began to appear on land. watervapourdissolvelifeplantsshellfishLater land animals appeared. Some were

17、_. Others, called_, were able to live on land as well as in the sea. When the plants grew into forests, _appeared for the first time. Then _developed, which became the most important animals on the earth for millions of years. After they disappeared, _ became more important. Text Retellinginsectsamp

18、hibiansreptilesdinosaursmammalsThey were the last group of animals and they were different because they _ their young from within their bodies. Small clever animals, with hands and feet, _ and _ all over the earth. As time went by, they covered the earth and have become the most important animals on the planet.Text RetellingproducedappearedspreadWe are making the world better.We are making the world worse.ABDiscussion developed new methods of growing food(1) What humans developed?developed new methods of hunting developed new methods of movin