1、What are the names of the eight planets that circle the sun?第1頁/共34頁海王星海王星 Neptune水星水星Mercury 金星金星Venus 地球地球Earth 火星火星Mars 木星木星Jupiter 土星土星Saturn天王星天王星Uranus 第2頁/共34頁HOW LIFE BEGAN ON THE EARTH第3頁/共34頁1. Do you know the origin of life on earth?2. Each religion or culture has its own ideas about how

2、life began on earth.第4頁/共34頁 In Chinese culture_ separates(分) the sky from the earth.Pangu 盤古skyearth第5頁/共34頁_ made human beings.Nuwa (女媧女媧)第6頁/共34頁In western countries:_ created the world and all living things.God (上帝)第7頁/共34頁Do you know what a scientific idea is?Background knowledgeThe Big Bang is

3、 the term used to describe a huge explosion that scientists believe happened about 15 billions years ago. Nobody knows what caused the Big Bang. But it was the event that created our universe. The Big BangThe universe began with a Big Bang.第8頁/共34頁 Read the passage on P25 quickly, and match the righ

4、t main idea of each paragraph. How many parts can the text be divided into?Step 1. Fast readingHow life began on the earth第9頁/共34頁Para.1 Para.2Para.3Para.4Para.5 A theory about how the universe was formedThe formation(形成） of the earthThe importance of water for lifeThe development of plants and anim

5、alsThe arrival of humans and their effects on the earthPart1: The development of the earthPart2:The development of life.第10頁/共34頁( 2 ) Detailed ReadingPart 1(13): The development of the earth第11頁/共34頁Part1 (para13) The development of the earth(1) After the Big Bang, what happened?(2) What happened t

6、o the solid globe next?(3) What did the water vapour and gases were to make?(4) What appeared after the earth cooled down?(5) What did the water do?How did the earth come into being?第12頁/共34頁(1) After the Big Bang, what happened? a cloud of dust a violent solid ball Settled into第13頁/共34頁exploded wit

7、h fire and rock produced water vapour and gases(2) What happened to the solid globe next?In time第14頁/共34頁(3) What did the water vapour and gases were to make?the earths atmosphere第15頁/共34頁Water appeared on its surface which is important for the beginning of life on the earth. (4) What appeared after

8、 the earth cooled down?第16頁/共34頁(5) What did the water do?It allowed the earth to dissolve harmful gases and acids into the oceans and seas.第17頁/共34頁a cloud of _ Big Banga solid _slowly combinethe earth _ downit exploded loudly with _ and _waterthe earths _dustball/globefire rockatmospherecooledHow

9、did the earth come into being(產生）?第18頁/共34頁A cloud of energetic dust A solid ballAtmosphere A world full of water4132Combine into Explode with fire and rockdissolve harmful gases Cool down 第19頁/共34頁Part 2 (Part 2 (45) The development of life The development of life第20頁/共34頁Part2 (para45) The develop

10、ment of lifeRead para4 carefully and make a timeline of the development of life第21頁/共34頁water 1. 2. 10. 3. 4. insects (on land)5. 6. 7._8. dinosaurs (on land)9._ 11. small _ in water_ and all sorts of fishgreen plants on land _(on land and in water)forests (on land) (on land)small clever animals wit

11、h _plantsshellfishamphibiansreptilesmammalshands and feet1. a timeline of the development of life第22頁/共34頁第23頁/共34頁第24頁/共34頁the cleverest animals第25頁/共34頁 The arrival of _ encouraged the _of early _. Many millions of years later _ began to appear _. Later _ appeared. Some were_. Others called _, wer

12、e able to live on lands well as _. When the plants grew into forests, _appeared for the first time. After they disappeared, _became more important. They were the last group of animals different from because they _milk from within their bodies.development shellfish and all sorts of fish on land land

13、animalsamphibians dinosaurs mammals produced small plants the first green plants insects in the sea第26頁/共34頁Read pare5 carefully .find out the answer.1. What problem is caused by human being?They caused global warming.They caused global warming.第27頁/共34頁第28頁/共34頁 According to the pictures, have a tr

14、y to retell the development of life.第29頁/共34頁The earth is getting warmer each year.what effects will this have? How to solve this problem?第30頁/共34頁Suggested Answers: The earth will be so hot that no life will exist（存在）on the earth any more. To solve this problem, people should protect the earth carefully. They must stop putting too much carbon dioxide into the air , reduce pollution, control the populati