Howlifebeganontheearth閱讀公開課學(xué)習(xí)課程

1、How Life Began on the Earth第1頁/共50頁第一頁，編輯于星期五：二十三點(diǎn) 二十二分。Do you know how life began on earth is explained in different religions and cultures? 第2頁/共50頁第二頁，編輯于星期五：二十三點(diǎn) 二十二分。Pangu separates the sky from the earth 第3頁/共50頁第三頁，編輯于星期五：二十三點(diǎn) 二十二分。God created the world in seven days第4頁/共50頁第四頁，編輯于星期五：二十三點(diǎn) 二十

2、二分。Some legends about the beginning of universe.What is the scientific theory about the beginning of life on the earth?That is the topic we are going to talk about.Follow me, We will get it第5頁/共50頁第五頁，編輯于星期五：二十三點(diǎn) 二十二分。 第6頁/共50頁第六頁，編輯于星期五：二十三點(diǎn) 二十二分。Read the passage quickly to catch the main idea of t

3、he passage :Topic:_Key words:_-_-_-_第7頁/共50頁第七頁，編輯于星期五：二十三點(diǎn) 二十二分。Key words:1._2._3._4._ Topic: _ How Life Began on the earthairwaterplantsanimals第8頁/共50頁第八頁，編輯于星期五：二十三點(diǎn) 二十二分。New words The universebegan with a“Big Bang”.第9頁/共50頁第九頁，編輯于星期五：二十三點(diǎn) 二十二分。 Stephen William Hawking,put forward a theory about

4、black holes.理論，學(xué)說i:ri：第10頁/共50頁第十頁，編輯于星期五：二十三點(diǎn) 二十二分。The most powerful force in the univers is atomic bomb 原子的(adj)atom原子tm第11頁/共50頁第十一頁，編輯于星期五：二十三點(diǎn) 二十二分。Carbon ,nitrogen,water vapour and other k:bn naitrdn veipgases are to make the earhs atmosphere.tmsfi第12頁/共50頁第十二頁，編輯于星期五：二十三點(diǎn) 二十二分。 mltiplaiPlants

5、 multiplied and filled the oceans and sea with oxgen第13頁/共50頁第十三頁，編輯于星期五：二十三點(diǎn) 二十二分。amphibiansmfibinAmphibians can live in the water as well as on land.第14頁/共50頁第十四頁，編輯于星期五：二十三點(diǎn) 二十二分。Reptiles produced young generallybylaying eggsreptail第15頁/共50頁第十五頁，編輯于星期五：二十三點(diǎn) 二十二分。 mmlMammals like monkeysgave birth

6、 to young baby animals and produced milk to feed them.第16頁/共50頁第十六頁，編輯于星期五：二十三點(diǎn) 二十二分。 ,fndmentlWater was to be fundamental to the development of life.be base on第17頁/共50頁第十七頁，編輯于星期五：二十三點(diǎn) 二十二分。Water allowed the earth to dissove hurmful gases and acids into the oceans. This produced a chain reaction,wh

7、ich made it possible for life to develop.第18頁/共50頁第十八頁，編輯于星期五：二十三點(diǎn) 二十二分。 k:bn daiksaidThey are putting too much carbon dioxide into the atmosphere ,which prevents heat from escaping the earth into space第19頁/共50頁第十九頁，編輯于星期五：二十三點(diǎn) 二十二分。in time 及時(shí)lay eggs 下蛋give birth to 分娩in one turn 輪到某人prevent .from.

8、=stop from第20頁/共50頁第二十頁，編輯于星期五：二十三點(diǎn) 二十二分。Read the text quickly and match the main idea for each paragraph.第21頁/共50頁第二十一頁，編輯于星期五：二十三點(diǎn) 二十二分。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 a

9、rrival of humans and their impact on the earth. Para. 5 The development of plants and animals on the earth.第22頁/共50頁第二十二頁，編輯于星期五：二十三點(diǎn) 二十二分。 第23頁/共50頁第二十三頁，編輯于星期五：二十三點(diǎn) 二十二分。第24頁/共50頁第二十四頁，編輯于星期五：二十三點(diǎn) 二十二分。第25頁/共50頁第二十五頁，編輯于星期五：二十三點(diǎn) 二十二分。A cloud of dustA cloud of dustCombine into a Combine into a soli

10、dsolid ball ballExplodeExplodewith fire & rockwith fire & rock(produce H(produce H2 2O, COO, CO2,2,OO2, 2, NN2, 2, other gases)other gases) atmosphereatmosphereCool downCool downwater appearedwater appeared Life began Life began and and developeddevelopedplants-animals第26頁/共50頁第二十六頁，編輯于星期五：二

11、十三點(diǎn) 二十二分。Fish and shellfish第27頁/共50頁第二十七頁，編輯于星期五：二十三點(diǎn) 二十二分。amphibians第28頁/共50頁第二十八頁，編輯于星期五：二十三點(diǎn) 二十二分。retiles第29頁/共50頁第二十九頁，編輯于星期五：二十三點(diǎn) 二十二分。dinosaurs第30頁/共50頁第三十頁，編輯于星期五：二十三點(diǎn) 二十二分。Mammals第31頁/共50頁第三十一頁，編輯于星期五：二十三點(diǎn) 二十二分。human beings第32頁/共50頁第三十二頁，編輯于星期五：二十三點(diǎn) 二十二分。Work in pairs: Put the order of devel

12、opmentof life into a timeline first according to your common sense, and then according to the reading passage. 第33頁/共50頁第三十三頁，編輯于星期五：二十三點(diǎn) 二十二分。1073849615 212 111. 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 o

13、ther fish appeared.11. Clever animals with hands and feet appeared.2. 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 Bang.12. Mammals appeared.第34頁/共50頁第三十四頁，編輯于星期五：二十三點(diǎn) 二十二分。 True (T) or False

14、 (F).1. The earth appeared before the Big Bang happened.2. The original atmosphere consisted of nitrogen and oxygen. 3. The main difference between the earth and other planets is that there is water on the earth. 4. Life began in water and then on land.FFTTDiscuss in groups:第35頁/共50頁第三十五頁，編輯于星期五：二十三

15、點(diǎn) 二十二分。5. Mammals appeared before the development of dinosaurs.6. Dinosaurs could give birth to young baby animals and produced milk to feed them. 7. Human beings produce too much carbon dioxide which causes the global warming on the earth. 8. According to the text, human beings would disappear in t

16、he end. FFTF第36頁/共50頁第三十六頁，編輯于星期五：二十三點(diǎn) 二十二分。1. What was there on the earth before life could begin? 2. Why do scientists think there has never been life on the moon? 3. Why did animals first appear in the seas? 4. Why did green plants help life to develop? 5. Why were mammals different from other an

17、imals?Answer the following questions :第37頁/共50頁第三十七頁，編輯于星期五：二十三點(diǎn) 二十二分。1. What was there on the earth before life could begin? Water _, carbon _, o_, nitrogen and other gases.vapourdioxideoxygen第38頁/共50頁第三十八頁，編輯于星期五：二十三點(diǎn) 二十二分。2. Why do scientists think there has never been life on the moon? Because t

18、here is no _ on the moon.3. Why did animals first appear in the seas? Because water allowed the earth to _into the oceans and seas. waterdissolve harmful gases第39頁/共50頁第三十九頁，編輯于星期五：二十三點(diǎn) 二十二分。4. Why did green plants help life to develop? Because green plants can take _ from the atmosphere and fill th

19、e air with _carbon dioxideoxygen.第40頁/共50頁第四十頁，編輯于星期五：二十三點(diǎn) 二十二分。5. Why were mammals different from other animals? They were different because they gave birth to young baby animals and produced milk to feed them第41頁/共50頁第四十一頁，編輯于星期五：二十三點(diǎn) 二十二分。III. Read the text and fill in the blanks in the following

20、 form.TimeWhat happenedBig Bang_ began to form and combine to create stars and other bodies.Atoms第42頁/共50頁第四十二頁，編輯于星期五：二十三點(diǎn) 二十二分。Between 4.5 and 3.8 billion years agoDust settled into a solid and _ globe.The earth exploded to produce its_ .The continued _ of water allowed the earth to dissolve harmf

21、ul gases and _ into the oceans and seas.violentatmospherepresenceacids第43頁/共50頁第四十三頁，編輯于星期五：二十三點(diǎn) 二十二分。Many millions of years laterThe first small plants on the surface of the water produced_ .Early _ and all sorts of fish appeared.Green plants began to grow on land. Insects and_ appeared.oxygenshell

22、fishamphibians第44頁/共50頁第四十四頁，編輯于星期五：二十三點(diǎn) 二十二分。Many millions of years later_ appeared and they laid eggs.Dinosaurs developed, laid eggs and _ for more than 140 million years.Mammals rose and _ babies.Reptilesexistedgave birth to第45頁/共50頁第四十五頁，編輯于星期五：二十三點(diǎn) 二十二分。About 2.6 million years agoSome small _ animals with hands and feet appeared and spread all o