人教版必修三教师用书：Unit+4+Section+Ⅰ Reading

Unit 4 Astronomy：the science of the stars

地壳运动使地球分裂为七大洲，未来七大洲会继续分裂还是合为一体？

Will the continents join again in the far future?

In the beginning，more than 4.6 billion years ago，the world was a ball of burning gas，going round and round through space.At first，hot gases were able to escape into outer space，but as the earth cooled，they were held by gravity to form the early atmosphere.Clouds began to develop as water vapour collected in the air.And then it began to pour with rain，causing the early oceans to rise up.

It took hundreds of millions of years for the first land masses to appear.About 250 million years ago，long，long after the earth had formed，all the continents of the time had joined together to form a super­continent called Pangaea(盘古大陆)．

This super­continent broke up about 200 million years ago to form two giant(巨大的)continents，Gondwana and Laurasia.Gondwana was made up of what is now Africa，South America，Australia，Antarctica and India.The Indian sub­continent lay off the east coast of Africa，before it broke off and moved north rapidly.

It collided(碰撞)with Asia，creating one of the world's greatest mountain ranges，which extends for more than 2，400 kilometers－the Himalayas.By now，our world had started to look like something we would recognize.The amazing process of plate tectonics (板块构造)，in which the earth's land masses move slowly across the earth's crust(外壳)，is still continuing.

Far in the future，some scientists have predicted that the present continents will join again to form a new super­continent.

Only time will tell...

阅读短文，判断正(T)误(F)

1．The early oceans appeared because of the rain which developed from hot gases.( )

2．Pangaea was made up of what is now Africa，South America，Australia，Antarctica and India. ( )

3．Only time will tell whether the present continents will join again.( )

【答案】1－3 TFT

Section ⅠReading (Warming Up，Pre­reading，Reading & Comprehending)

[新生词汇初识]

Ⅰ.匹配下列单词的词性及汉语意思

1．astronomy A．n.学说；理论

2．system B．adj.猛烈的；激烈的；强暴的

3．theory C．n.大气层；气氛

4．violent D．adj.基本的；基础的

5．atmosphere E．vi.&vt.乘；增加

6．fundamental F．n.&v.谜；(使)迷惑

7．harmful G．vi.存在；生存

8．multiply H．adj.有害的

9．exist I．n.天文学

10．puzzle J．n.系统；体系；制度

【答案】1－5 IJABC 6－10 DHEGF

Ⅱ.选择下列句中相对应词组的汉语意思

.

2．As we know，laying eggs is the ant queen's full­time job.

3．Once she has made up her mind，nobody can prevent her from carrying out the

plan.

4．When it was in my turn，I was too excited to speak.

5．Jane has just given birth to twins，so her mother must be in the hospital

looking after her now.

6．My relationship with the actors is fundamental to my work as a director.

【答案】1－6 BACDEF

[教材语篇细研]

第一步速读——了解文章主题和段落大意

速读P25－26教材课文，匹配段落大意

1．Para.1 A．The formation of the earth.

2．Para.2 B．A widely accepted theory about the formation of the

universe.