预习课文1 How life began on the earth
把下列单词的中文意思写出来(尽量回忆不看书)
astronomy___________
atom___________
globe___________
multiply___________
dissolve ___________
acid___________
atmosphere___________
carbon___________
dioxide ___________
nitrogen ___________
oxygen ___________
vapour ___________
shellfish___________
insect ___________
amphibian___________
reptile ___________
dinosaur___________
mammal___________
在书本中找出下列短语
太阳系_________________
围绕着转_______________
与…匹配______________
生命的起源_____________
…的观点______________
根据______________
以…开始______________
向各个方向_____________
在…和…之间___________
最终，及时______________
冷却，变凉______________
在表面______________
生命的发展____________
水的长期存在___________
允许…做某事___________
把…溶解在…里_________
连锁反应______________
使…成为可能___________
用…把…填满___________
也，又，还______________
第一次______________
下蛋______________
恐龙时代______________
仍然是个谜_____________
与…不同______________
分娩，产生______________
接着，轮到某人__________
照顾 ，照看_____________
阻止/制止…做某事_______
逃出，逃避______________
因此______________
太…以至于_____________
依赖, 依靠_____________
1. 没有人知道地球什么时候形成，因为时间太久远了。
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2. 他们最终产生了碳、氮气、水蒸气和其他多种气体，从而形成了地球的大气层。
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3. 更重要的是随着地球的冷却, 地球的表面就开始出现了水.
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4. 很多科学家相信，由于地球上长期有水存在，使地球得以把有害气体和酸性物质溶解在海洋里。
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5. 他们为什么突然消失仍然是个谜。
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6. 所以，在未来的数百万年中，生命能否在地球上延续取决于这个问题能否得到解决。
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预习课文2 A visit to the moon
有做…的机会_________________
地球的引力_________________
能够做某事_________________
感觉好像_________________
靠近_________________
感到振奋_________________
少于_________________
两倍远_________________
既然_________________
熟悉，掌握，理解_________________
感到愉快，过得快活_________________
和…一样痛苦_________________
爆发，突发_________________
密切注意_________________
确保…_________________
注意…_________________
Reading Comprehension
Fast reading
Scanning: read the passage quickly and answer the questions.
1. When did the “Big Bang” happen?
2. What form was the earth after the “Big Bang”?
3. What made up the earth’s atmosphere after the earth exploded?
4. How did water come into being on the earth?
5. What’s the importance of the presence of water on the earth?
6. What made possible the rise of mammals on the earth?
7. Why are mammals different from all life forms in the past?
Skimming: match the main idea with each paragraph.
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 arrival of humans and their impact on the earth.
Para. 5 The development of plants and animals on the earth.
Detailed Reading
Put the order of development of life into a timeline.
□ Insects and amphibians appeared.
□ The earth became a solid ball.
□ Reptiles appeared.
□ The earth was a cloud of dust.
□ Shellfish and other fish appeared.
□ Clever animals with hands and feet appeared.
□ Dinosaurs appeared.
□ Small plant grew on the water.
□ Plants began to grow on dry land.
□ Water appeared on the earth.
□ Mammals appeared.
□ The universe began with a “Big Bang”.
Timeline: _______________________________________________________
Read para1-2 and fill in the blanks with proper words.
After the ________, the earth was a cloud of_____________. Later the dust began to _______ into______. And then it ________ loudly with fire and rock , which were in time to ________ the water vapour, carbon dioxide, …which were to make the earth’s _________. As the earth _______ down, ______egan to _______ on its surface. Water had _________ from planets or satellites, but it _______on the earth. That made it possible for life to begin to ______ .
Read para3-j and fill in the blanks.
The arrival of __________ encouraged the___________of early___________________. Many millions of years later ________________ began to appear _________. Later ____________ appeared. Some were__________. Others called __________, were 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.