1、Unit 4 Astronomy：the science of the stars,单元话题美文,Space Modern astrology tells us the stars are all globes，like our sun，far away in space.However，in the ancient times people were not able to explain many natural things in a scientific way，so they turned to imagination and explained what they saw with
2、 beautiful stories. In China we also have a lot of old stories about the sun，the moon and the stars，such as “The herd boy Niulang and the weaving girl Zhin”，etc.,Nowadays modern science and technology has brought Man into outer space.People have realized the dream to walk on the moon.They even sent
3、home devices to Mars.And，our China-made “Shen Zhou” spaceships have also entered space.It is said in not far future，Chinese astronauts will set their steps on the moon，too.Man-made satellites launched in space has become an important part of our ordinary life.They are used to provide weather forecas
4、ts，take photos of the earth，connect international calls and help people worldwide to find their exact location.,太空 现代占星学告诉我们星体即球体，像太空中遥远的太阳。但是，古代人们不能用科学的方法来解释很多自然现象，因此，他们就通过想象用美丽的故事来解释他们所看到的事情。 在中国我们也有很多关于太阳，月亮和星星的古老的故事，如“牛郎织女”等。 现在，现代科技已经把人类带入了外太空。人们已经实现了月球漫步的梦想。他们甚至把家用设施发射到火星上去了。我们中国制造的“神舟”宇宙飞船也已进
5、入太空。据说，在不久的将来中国也将踏上月球。人造卫星发射到太空也已经成为我们普通生活的一部分。他们被用来提供天气预报，给地球拍照，连接国际电话以及帮助全球的人定位。,课文预读,Period One Warming Up & ReadingPre-reading,匹配左边的单词和右边的汉语意思 第一组,1.astronomy A.太阳的；日光的 2.solar B.宗教；宗教信仰 3.system C.天文学 4.religion D.原子 5.atom E.系统；体系；制度,第二组,6.violent A.大气层；气氛 7.carbon B.碳 8.atmosphere C.基本的；基础的 9
6、.fundamental D.猛烈的；激烈的；强暴的 10.dissolve E.溶解；解散,第三组,11.acid A.氧 12.chain B.链子；连锁；锁链 13.multiply C.酸 14.oxygen D.两栖动物 15.amphibian E.乘；增加,第四组,16.reptile A.哺乳动物 17.dinosaur B.恐龙 18.mammal C.因此；于是 19.thus D.爬行动物；爬虫 20.dioxide E.二氧化物,.Do you know the eight planets circling around the sun in our solar sys
7、tem？If so，please match them with the Chinese meaning.,1.Uranus A.水星 2.Venus B.金星 3.Earth C.海王星 4.Mars D.天王星 5.Mercury E.木星 6.Jupiter F.地球 7.Neptune G.火星 8.Saturn H.土星,.What do you know about the origin of life on the earth?,答案 略,答案,Step 1 Fast-reading .Skim the text and choose the best answer. The t
8、ext mainly tells us . A.how the earth came into being B.the development of humans C.the formation of the earth and the development of life on it D.how life appeared on the earth,答案,.Match each paragraph with its main idea. Para.1 A.How humans appeared and what effects they had on the earth. Para.2 B
9、.Water is very important to life on the earth. Para.3 C.How the earth formed. Para.4 D.How the plants and animals on the earth developed. Para.5 E.It is widely accepted that the universe began with a “Big Bang”.,答案,Step 2 Careful-reading Read the passage carefully and choose the best answers. 1.Why
10、was life able to develop on the earth but not on other planets? A.Because the earth had a solid shape. B.Because the earth did not have harmful gases in its atmosphere. C.Because water stayed on the earth but not on other planets. D.Because the earth was neither too hot nor too cold.,答案,1,2,3,4,5,2.
11、Why was it necessary for plants to grow before animals? A.Because animals needed plants to protect them from the sun. B.Because plants provided oxygen for animals to breathe. C.Because animals could hide from hunters in the forest. D.Because it was easier for plants to grow.,答案,1,2,3,4,5,3.What is t
12、he correct order according to the passage? The clever animals with hands and feet appeared and spread all over the earth. The “Big Bang”. Small plants began to appear on the surface of the water. 65 million years ago，the age of the dinosaurs ended. A. B. C. D.,答案,1,2,3,4,5,4.Early humans appeared af
13、ter dinosaurs died out million years later. A.67.6 B.62.4 C.65 D.140,答案,1,2,3,4,5,5.What is the main idea of the text? A.The formation of the earth. B.The arrival of humans and their impact on the earth. C.The development of plants and animals on the earth. D.The origin of life on the earth.,答案,1,2,
14、3,4,5,Step 3 Post-reading After understanding the passage，please fill in the following blanks. The earth was just 1. cloud of dust after the “Big Bang”.The earth exploded 2. (loud) with fire and rock.They were in time to produce many things，which were 3. (make) the earths atmosphere.As the earth coo
15、led down，water began to appear on its surface.It allowed the earth to dissolve 4. (harm) gases.Then life began to develop.,答案,a,loudly,to make,harmful,Small plants multiplied and filled the oceans and seas with oxygen. This encouraged the 5. (develop) of early shellfish and fish. Land animals such a
16、s insects，reptiles and dinosaurs 6. (appear) after green plants began to grow.Small clever animals spread all 7. the earth.They are putting too much carbon dioxide into the atmosphere, 8. prevents heat from escaping from the earth into space.9._ life will continue on the earth for millions of years
17、to come will depend on whether this problem can 10. (solve).,答案,development,appeared,over,which,Whether,be solved,Step 4 Sentence-learning 1.No one knows exactly how the earth began，as it happened so long ago. 句式分析 本句为复合句，how引导的是宾语从句；as引导的是原因状语从句。 自主翻译 _ _,答案,没有人确切地知道地球是怎样形成的，因为在很早以前,它就形成了。,2.What i
18、s even more important is that as the earth cooled down，water began to appear on its surface. 句式分析 本句为复合句，what引导的是主语从句；that引导的是表语从句，在表语从句中又含有一个as引导的伴随状语从句。 自主翻译 _ _,答案,更为重要的是，随着地球的冷却，地球的表面开始出现,了水。,3.So whether life will continue on the earth for millions of years to come will depend on whether this problem can be solved. 句式分析 本句为复合句。So whether life will continue on the earth for millions of years to come是主语从句；whether this problem can be solved是宾语从句，作介词on的宾语。 自主翻译 _ _,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。,答案,