預(yù)習(xí)課文1 How life began on the earth
把下列單詞的中文意思寫出來(盡量回憶不看書)
astronomy___________
atom___________
globe___________
multiply___________
dissolve ___________
acid___________
atmosphere___________
carbon___________
dioxide ___________
nitrogen ___________
oxygen ___________
vapour ___________
shellfish___________
insect ___________
amphibian___________
reptile ___________
dinosaur___________
mammal___________
在書本中找出下列短語
太陽系_________________
圍繞著轉(zhuǎn)_______________
與…匹配______________
生命的起源_____________
…的觀點______________
根據(jù)______________
以…開始______________
向各個方向_____________
在…和…之間___________
最終，及時______________
冷卻，變涼______________
在表面______________
生命的發(fā)展____________
水的長期存在___________
允許…做某事___________
把…溶解在…里_________
連鎖反應(yīng)______________
使…成為可能___________
用…把…填滿___________
也，又，還______________
第一次______________
下蛋______________
恐龍時代______________
仍然是個謎_____________
與…不同______________
分娩，產(chǎn)生______________
接著，輪到某人__________
照顧 ，照看_____________
阻止/制止…做某事_______
逃出，逃避______________
因此______________
太…以至于_____________
依賴, 依靠_____________
1. 沒有人知道地球什么時候形成，因為時間太久遠(yuǎn)了。
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2. 他們最終產(chǎn)生了碳、氮氣、水蒸氣和其他多種氣體，從而形成了地球的大氣層。
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3. 更重要的是隨著地球的冷卻, 地球的表面就開始出現(xiàn)了水.
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4. 很多科學(xué)家相信，由于地球上長期有水存在，使地球得以把有害氣體和酸性物質(zhì)溶解在海洋里。
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5. 他們?yōu)槭裁赐蝗幌匀皇莻�謎。
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6. 所以，在未來的數(shù)百萬年中，生命能否在地球上延續(xù)取決于這個問題能否得到解決。
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預(yù)習(xí)課文2 A visit to the moon
有做…的機(jī)會_________________
地球的引力_________________
能夠做某事_________________
感覺好像_________________
靠近_________________
感到振奮_________________
少于_________________
兩倍遠(yuǎn)_________________
既然_________________
熟悉，掌握，理解_________________
感到愉快，過得快活_________________
和…一樣痛苦_________________
爆發(fā)，突發(fā)_________________
密切注意_________________
確�！璤________________
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.