Book 3 unit 4 reading 讲课

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Unit 4

How life began on the earth

Reading高一人教新课标版必修三Go over some words in this passage 复习

matter

atom

explode

solid

atmosphere

water vapour

nitrogen

物质

原子

爆炸

固体的

大气层

水蒸气

氮气multiply

oxygen

shellfish

amphibian

reptile

mammal

dissolve增加

氧气

贝类

两栖动物

爬行动物

哺乳动物

溶解1. Do you know the origin of life  on earth?2. Each religion or culture has its  own ideas about how life began  on earth. In Chinese legend culture…____________ separates(分) the sky

　　　　　　　　　 from the earth.Pangu 盘古skyearth_____________ made human beings.Nvwa (女娲)In western countries:

　　　　　　　______________ created

the world and all living things.God (上帝)Turn to page 25. Listen to the passage carefully and then do the following tasks Fast ReadingThe passage is mainly about how _________ on the earth.life beganMatch the general ideas of each paragraph

Para 1---- A. The importance of water for life

Para 2--- B. Humans’ appearance and their bad influence on the earth

Para 3--- C. The development of plants and animals on the earth

Para 4--- D. The Big bang created the universe

Para 5--- E. The earth came into being

1. What kind of gas did the plants produce for the later animals?

They produced oxygen for animals to breathe.

2. Why is it wrong in films and stories to show dinosaurs and people together?Answer the questions. Because dinosaurs died out long before human beings developed on the earth.Which of the following statements is true?

A. Surely, after millions of years of the Big Bang, the earth

came into being.

B. In fact, Pangu(盘古) separated the sky and the earth

C. Water only appeared on the earth according to Big Bang

theory.

D. No one knows exactly how the earth began.

D2. Why was it necessary for plants to grow before animals?

A. Animals needed plants to protect them from the sun.

B. Plants provided oxygen for animals to breathe.

C. Animals could hide from hunters in the forest.

D. It was easier for plants to grow.B3. From the last paragraph, we can see the author holds the view

that ______

A. humans’ coming into being does good to the earth.

B. the earth will surely become too hot to live on.

C. humans have become the most important animals

D. carbon dioxide is heating the atmosphere of the earth.C

4. According to the last paragraph, the author is _____

A. confident B. sad

C. concerned D. angryCRead paragraph by paragraph

Task one --- retell the paragraphs

Task two --- fill in the blanks by grasping

the details No.3 No. 4 No.1 No.2The universe began with a _____________ that threw________ in all directions. After that, _______began to form and combine to create ________ and other bodies. Big Bang matteratomstarsPara 1No.____ No.____ No. ____ No.____3412No.1No.2No.3For several billion years after the Big Bang, the earth was still just ______________. Many years later, the dust settled into ___________. It was so violent that it ___________with fire and rock, which in time produced the early atmospherea cloud of dusta solid globeexplodedPara 2No.____ No.____ No. ____231The early atmosphereThe earth’s

atmospherenitrogenother gasescarbon dioxidewater vapour Hydrogen 氢气Para 2cooled downwater vapour (in atmosphere )waterAs the earth _____________, _______ began to appear on the earth. The earth dissolved harmful _____________ into oceans and seas, which produced _______ reactions, making it possible for ___ to develop.cooled downwatergases and acidsa chainlife？Para 3Big Banga cloud of ______a solid ________fire and ____atmospherewater ______other gaseswaterdustsettled intoglobeexploded withproducedcooled downrockvapour_________①②③④⑤in time orderMany millions of years later _____________began to appear on the surface of the water. They _____________ and filled the ocean with _________, which encouraged later animals in the ocean.small plantsmultipliedoxygenPara 4Oxygen encouraged the development of ______________ and _______________shellfishall sorts of fishshellfishall sorts of fishNext, ____________began to grow on land. They were followed by land animals. Some were ___________ and others were ___________ which were able to live on land as well as in the water.green plantsinsectsamphibiansNo. 1No.2No.3No.____ No.____ No. ____312Later when the plants grew into ________, __________ appeared for the first time. After that, some huge animals, called ____________, developed and lived on the earth for more than 140 million years until they suddenly died out, which remains a mysteryforestsreptiles dinosaursNo.1No. 2No.3No.____ No.____ No. ____231 mammalsThe disappearance of dinosaurs made ____________ develop fast. They were different from all life forms in the past. They _______________ young babies and produced _____ to feed them.mammalsgave birth tomilkFinally about 2.6 million years ago, __________ began to appear and spread on the earth. They became the most important animals. humansPara 5 factorycars’ exhaustHumans put too much ________________ into the atmosphere, which prevents _____from escaping from the earth into _______. The earth may become too _____ to live on it one day.carbon dioxideheatspacehotextremely small plantsshellfish and

_______________________ on land land animals

insects __________forest on landreptiles____________________________all sorts of fishgreen plantsamphibiansdinosaurshumansmammals①②③④⑤in time orderPut the events into a timeline. (Page 27) 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 appeared.Keys: 10 7 3 8 4 9 6 1 5 2 12 112. 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.短语（小结） Sum up

朝四面八方 in time

一团尘埃 carbon dioxide

冷却 dissolve harmful gases

连锁反应 remain a mystery 内容过长，仅展示头部和尾部部分文字预览，全文请查看图片预览。 p>waterreptilesdinosaursmammalsgave birth to milk Para 5

Humans are putting too much _______________ into the atmosphere, which prevents _____ from _______ from the earth into ______.

As a result, the earth may become too _____ to live on. Life depends on ________ the problem can be _________.carbon dioxide heat escaping space hot whether solved [文章尾部最后500字内容到此结束,中间部分内容请查看底下的图片预览]

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