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A Quiz Game 1. How old is the earth? A. About 3.5 billion years B. About 4.5 billion years C. About 5.5 billion years D. About 6.5 billion years 2. ______ of the earth surface is covered by

water. A. 20% B. 30% C. 50% D. 70%

3. How many planets are there in the Solar System? A. 6 B. 7 C. 8 D. 9 4. What is the total population of human on the earth? A. About 3.5 billion B. About 4.5 billion C. About 5.5 billion D. About 6.5 billion

5. How long does the rotation (自转) of the earth take? A. 12 hours B. 24 hours C. a month D. 365 days 6. Which continent is the smallest? A. Africa B. North America C. South America D. Oceania 7. On what day is the Earth day celebrated? A. April 22 B. May 4 C. August 21 D. November 11

8. Which ocean is the largest? A. The Pacific Ocean B. The Arctic Ocean C. The Indian Ocean D. The Atlantic Ocean 9. Which country has the largest area? A. Canada B. China C. Russia D. U.S.A

Can you name them?

What’s the origin of life on earth?
? Pan Gu set about the task of creating the world, which took 18,000 years. ? After the 18,000 years, Pan Gu was laid to rest. His breath became the wind; his voice the thunder; left eye the sun and right eye the moon; his body became the mountains and extremes of the world; his blood formed rivers; his muscles the fertile lands; his facial hair the stars and milky way; his fur the bushes and forests; his bones the valuable minerals; his bone marrows sacred diamonds; his sweat fell as rain; and the fleas on his fur carried by the wind became the fish and animals throughout the land.

God created the world in the western Literature

Day 1: God separated light from darkness creating Day and Night.

Day 2: God separated the water creating sky and ocean. Day 3: God created dry land. Day 4: God spoke and created the sun, moon and stars. Day 5: God spoke and created living creatures in the air and sea. Day 6: God spoke and created the land animals and man. Day 7: God rested and blessed this day calling it Holy.

Indian’s beliefs
Brahma is the god first represented in the Hindu Triad. He is the creator

of the universe and all
living beings are said to

have evolved from him.

New words
? ? ? ? ? ? ? theory atom billion globe violent carbon nitrogen

? ? ? ? ? ? ?

atmosphere fundamental acid chain multiply Oxygen amphibian

? ? ? ? ? ?

reptile mammal exist thus dioxide prevent from

Fast reading
True (T) or False (F) 1. The earth appeared before the Big Bang happened. F 2. The original atmosphere consisted of nitrogen and oxygen. F 3. The main difference between the earth and other planets is that there is water on the earth. T 4. Life began in water and then on land. T

5. Mammals appeared before the development of dinosaurs. F 6. Dinosaurs could give birth to young baby animals and produced milk to feed them. F 7. Human beings produce too much carbon dioxide which causes the global warming on the earth. T 8. According to the text, human beings would disappear in the end. F

Para. 1

Para. 2
Para. 3 Para. 4 Para. 5

The formation (形成) of the earth. The importance of water for life.

A widely accepted theory about the formation of the universe.
The arrival of humans and their impact on the earth. The development of plants and animals on the earth.

? However, according to a widely accepted theory, the universe began with a “Big Bang” that threw matter in all directions. ? begin with=start with:“以……开始”.
? to begin with=to start with 单独使用,表示“首先; 第 一; 起初; 最初”。 在句中作时间状语。

? e.g. To begin/start with, I couldn’t swim at all.
? 起初, 我一点都不会游泳。

? in theory 理论上
? 你的计划理论上很好,但实际不可行。 ? Your plan is good in theory, but it could not work in practice.

Read paragraph 2, 3 carefully and find out how the earth developed after the “Big Bang”?
A cloud of dust Settle into a solid ball Explode…with fire & rock (produce H2O、CO2 、O2 、N2 other gases) atmosphere Cool down Life began water appeared Life developed

dissolve harmful gases into …

What it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe. What surprised everybody 1. ______________________ (使大家吃惊的是)is that he didn’t come to the meeting. What he did (他所做的)added to our difficulty. 2. ___________

? ?

The earth became so violent that it was not clear whether the shape would last or not. violent 猛烈的,激烈的 whether可以引导主语从句、表语从句、宾语从句 和同位语从句;而if只能引导宾语从句。

? They were in time to produce carbon, nitrogen, water vapour and other gases which were to make the earth’s atmosphere. ? in time: finally, sooner or later; not late; ? I’ll see him in time. ? She will be back in time to prepare dinner. ? atmosphere (空气,氛围) [C,U] ? 这些植物喜欢湿热的空气。 ? These plants favor a warm and wet atmosphere. ? 两国元首在友好的气氛中洽谈。 ? The presidents of the two countries are holding talks in a friendly atmosphere.

? …as the earth cooled down, water began to appear on its surface.

? appear 表“出现”是动词,当表示 “似乎, 好像” 时是系动词, 该词无被动语态, 且不和like搭配。
? She is fifty but she appears young. 看起来很年轻。(其实并非如此) 她五十岁了, 但

? She seems young. 她看起来很年轻。(根据个人的主 观判断而推断出) ? She looks young. 她很年轻。(从她外表可以感觉出)

? look可用于进行时, 而seem, appear 一般不能。
? He is looking very happy. 他现在看起来很高兴。

? It was not immediately obvious that water was to be fundamental to the development of life. ? 水会对于生命的发展起关键作用, 这一点在当时并不 太明显。 ? What many scientists believe is that the continued presence of water allowed the earth to dissolve harmful gases and acids into the oceans and seas. ? Do sb harm/ do harm to sb ? = be harmful to sb= harm sb

? This produced a chain reaction, which made it possible for life to develop.
? make it + adj./n. for sb. /sth. to do sth.

? make it + adj./n. for sb. /sth. to do sth.
组长让我们可以一起合作。 The group leader made it possible for us to work together ____________________________________. 老师让他们容易地明白那个问题。 The teacher made it easy for them to understand the question ______________________________________________.

Read paragraph 4 and 5 carefully, and find out the order of development of life on the earth.
? ? ? ? ? ? 10. the universe began with a big bang 7. the earth was a cloud of dust 3. the earth became a solid ball 8. water appeared on the earth 4. small plants grew on the water 9. shellfish and other fish appeared

? ? ? ? ? ?

6. plants began to grow on dry land 1. insects and amphibians appeared 5.reptiles appeared 2. dinosaurs appeared 12. mammals appeared 11. clever animals with hands and feet appeared

Close reading on Para 4&5
? They multiplied and filled the oceans and seas with oxygen. ? multiply: 繁殖,增加,乘以 ? 这里的兔子繁殖得很快 ? The rabbits here multiply rapidly. ? 我们的问题增加了 ? Our problems have multiplied. ? 2乘以3等于6 ? 2 multiplied by 3 is 6. ? Or: 2 and 3 multiply to make 6.

? ? ? ?

They produced young generally by laying eggs. lay (laid; laid; laying) 放置;产卵 lie (lay; lain; lying) 躺;位于 lie (lied; lied; lying) 说谎

The naughty boy ___ to me that the hen that ___ there just now had ___ two eggs the day before.

A. laid; laid; laid B. laid; lay; lain D lied; lay; laid C. lied; laid; lain D.

? They lay eggs too and existed on the earth for more than 140million years.
? exist, existence, come into existence (形成)

? 你相信世界上有鬼么?
? Do you believe in the existence of ghost?

? These animals were different from all life forms in the past, because they gave birth to young baby animals and produced milk to feed them. ? The unusual experience gave birth to his latest novel.
? 这段奇特的经历促成了他的最新的一部小说。 ? 蚊子靠吸血为生。 ? The mosquitoes feed on blood.

? Thus they have, in their turn, become the most important animals on the planet. ? in one’s turn , It’s one’s turn to do sth ? by turns(轮流,交替) ? take turns to do/doing sth ? 轮到我做家务了。 ? I am to do the housework in my turn/ its my turn to do the housework. ? They are putting too much carbon dioxide into the atmosphere, which prevents heat from escaping from the earth into space. ? stop/prevent ... (from ) doing,keep ... from doing

? . …the earth may become too hot to live on. ? 当“only/all/not/but+too +adj. (形容词) + inf. ( 动词不定式)”时, 等于very (非常)。 ? I shall be only too pleased to hear from you further.

? 我非常欢迎你再来信。
? They are but too glad to do so. ? 他们非常喜欢这么做。 ? 在“cannot/can never...too”结构中,应理解为“ 无论怎样……也不会过分”。

? You can not praise him too highly. 你无论怎样表 扬他也不过分。


…whether life will continue on the earth for
millions of years to come will depend on whether this problem can be solved.


在未来的千百万年中, 生命能否在地球一延续将取 决于这个问题能否得到解决。

? believe sb.


? believe in sb. 信任/信赖某人

? trust (in) sb. 相信/信任/信赖某人
? depend/ rely on

? count on

Answer the following questions
1. Why was the earth different from other planets? There is water on the earth. 2. Why did the plants grow before the animals came? Because plants provide oxygen for animals to breathe.

3. Why is it wrong in films and stories to show
dinosaurs and people together?

Because dinosaurs died out long before human
beings developed on the earth. 4. Why do you think that humans are the cleverest animals on the earth? They are the cleverest animals because they have larger brains than any other creature on the earth so far.

How life began on the earth
“Big Bang” stars

atoms ________

other bodies

Earth: a cloud of _____ dust

globe a solid _____
carbon nitrogen water vapour other _____ gases

the earth’s _____________ atmosphere Water: fundamental ____________ to the development of life plants on the extremely small _______ surface of the water

early shellfish _________ and all sorts of fish green plants on land amphibians land animals human beings the rise of __________ mammals insects

reptiles ___________
huge animals (dinosaurs)



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