高中英語(yǔ)-牛津譯林版必修第三冊(cè)-unit-1-Reading課件

1、B3U1 Nature in the balance1B3U1 Nature in the balance1Reading 2Reading 2The Amazon rainforest: a natural treasure3The Amazon rainforest: a natu445566 亞馬孫熱帶雨林（Amazon Rain Forest）位于南美洲的亞馬孫平原，占地550萬(wàn)平方公里。雨林橫越了9個(gè)國(guó)家：巴西（占森林60%面積）、哥倫比亞、秘魯、委內(nèi)瑞拉、厄瓜多爾、玻利維亞、圭亞那、蘇里南以及法國(guó)（法屬圭亞那），占據(jù)了世界雨林面積的一半，占全球森林面積的20%，是全球最大及物種最多

2、的熱帶雨林。亞馬孫雨林被人們稱(chēng)為“地球之肺”和“綠色心臟”，“世界動(dòng)植物王國(guó)”等。 亞馬孫流域的熱帶雨林大半位于巴西。這里雨量充沛，加上安第斯山脈冰雪消融帶來(lái)大量流水，每年有大部分時(shí)間為洪水淹沒(méi)。雨林幾乎全年悶熱潮濕，日間氣溫約33C，夜間氣溫約23C。它從安第斯山脈低坡延伸到巴西的大西洋海岸。亞馬孫雨林對(duì)于全世界以及生存在世界上的一切生物的健康都是至關(guān)重要的。這片森林對(duì)世界氣候有很大影響，樹(shù)林能夠吸收二氧化碳，二氧化碳這種氣體的大量存在使地球變暖，以至極地冰蓋融化，引起洪水泛濫。樹(shù)木也產(chǎn)生氧氣，它是人類(lèi)及所有動(dòng)物的生命所必需的。7 亞馬孫熱帶雨林（Amazon Rain Fo 亞馬孫雨林產(chǎn)生

3、的氧氣占全球氧氣總量的1/10。木材占全世界木材總蘊(yùn)藏量的45%。生物物種占全世界總數(shù)的1/5，植物種類(lèi)和鳥(niǎo)類(lèi)各占世界的一半，淡水資源占世界總量的18%。亞馬孫平原的野生動(dòng)物種類(lèi)非常繁多，而且數(shù)量豐富。共有14712種動(dòng)物，其中8 000多種尚未為人所知，現(xiàn)在已知的動(dòng)物和鳥(niǎo)類(lèi)超出了10萬(wàn)種，可能另外還有幾百萬(wàn)種正等待著人們?nèi)グl(fā)現(xiàn)。因此，亞馬孫河流域?qū)θ驓夂蚝蜕鷳B(tài)環(huán)境的影響是舉足輕重的。 由于開(kāi)發(fā)不當(dāng)和保護(hù)不利，巴西的亞馬孫雨林正在遭到嚴(yán)重的破壞，正以驚人的速度減少，森林覆蓋率已從原來(lái)的80%減少到58%，專(zhuān)家們說(shuō)，這種情況對(duì)物種保護(hù)和全球氣候的平衡有可能構(gòu)成威脅。 造成森林大面積減少的原因首

4、先是近年來(lái)大量移民涌入亞馬孫地區(qū)，造成農(nóng)業(yè)耕地緊缺，因此毀林造田現(xiàn)象十分普遍。此外，由于缺乏有效的管理，無(wú)序采礦、修路、建房是造成大面積伐林的另一原因。與此同時(shí)，人為或自然因素引發(fā)的大火也使森林面積不斷減少。面對(duì)嚴(yán)峻局面，反對(duì)亂砍濫伐森林的呼聲日漸強(qiáng)烈。8 亞馬孫雨林產(chǎn)生的氧氣占全球氧氣總量的1/10ABBAC9ABBAC9CDRead the text and choose the best answer:10CDRead the text and choose theBAD11BAD11Para. 1: Para. 2: Para. 3: .Pare. 4: .Para. 5: .Plan

5、ts of the Amazon rainforest.Birds and animals of the Amazon rainforest.The summary of the Amazon rainforest.Read the documentary script and write the main idea of each paragraph. (P4)Introduction to the Amazon rainforestBasic information about the rainforest12Plants of the Amazon rainforesRead the d

6、ocumentary script again carefully and fill in the blanks with the figures. (P4)86 million640040,000130040020%1713Read the documentary script agThe status of The Amazon rainforset: _.The Amazon rainforest lies on_.It named after _.The Amazon rainforest and the Amazon River give the _ _on the earth.th

7、e largest rainforest in the worldthe South American continentThe Amazon Riverrichest biodiversityParas 1-2: Introduction14The status of The Amazon rainfbrazil nut; water liliesThere are levels of plant species.At the bottom: _Above: _The next level is. _Then. _roots leaf littershorter plants with la

8、rger leavestowering and ancient hardwoods4Para 3: Plants15brazil nut; water liliesAt 1,300 species of birds ; over 400 species of mammalsThe jaguars feed on .at least 87 speciesinsectsleaves and fruitmicroorganismsnutrients Para 4: Animals161,300 species of birds ; over 1. Why does the Amazon rainfo

9、rest play a significant role in maintaining the balance of the Earths ecosystem?2. Can we afford to damage the “l(fā)ungs of the planet”?the “l(fā)ungs of the planet”a treasure house of speciesfood and medicine materialsPara 5: Importance and danger171. Why does the Amazon rainfor1. What makes the Amazon ra

10、inforest a natural treasure according to the script?2. Are there any places in China with rich biodiversity like the Amazon rainforest? What are they? Introduce one to the class.Discussion181. What makes the Amazon rainfText analysis19Text analysis19Welcome to the jungle, a huge sea of green alive w

11、ith the sounds of animals. This is the Amazon rainforest. As the largest rainforest in the world, it plays a significant role in maintaining the fine balance of the Earths ecosystem.20Welcome to the jungle, a huge The Amazon rainforest crosses into eight countries, including Brazil and Peru, and one

12、 overseas region of France, all on the south American continent. With an area of around 6 million square kilometers, the Amazon rainforest is more than half the size of China.21 The Amazon rainforest crosseThe Amazon river, from which the rainforest gets its name, is close to 6,400 kilometers in len

13、gth - roughly 100 kilometers longer than the Yangtze River. On its journey from the mountains to the ocean, the river supports many different ecosystems. They give this area the richest biodiversity on the earth: one in ten known species in the world can be found here. 22The Amazon river, from which

14、 tOf the 390,000 plant species known to us, more than 40,000 can be found in the Amazon. This tall and ancient brazil nut tree produces nuts that we can eat; these water lilies are big enough to lie down on. The forests different levels support an unbelievable variety of wildlife. At the bottom, the

15、re is a system of roots beneath the ground. 23Of the 390,000 plant species kAbove that is the mass of leaf litter on the dark forest floor. The next level is made up of shorter plants with large leaves. Then there are the towering ancient hardwoods, and finally the tops of the tallest trees many met

16、ers above the ground. Each level of the forest forms its own little world, home to different kinds of living things.24Above that is the mass of leafMore than 1,300 species of birds and over 400 species of mammals hide among the jungles plant life. This jaguar is one example. It has a yellowish-brown

17、 coat with black spots. While a significant number of jaguars survive here, they are only one element of this forests food chain. They feed on at least 87 species, including frogs. These frogs, in turn, feed on insects which eat leaves and fruit. When a jaguar dies, a tiny army of microorganisms hel

18、ps break down its body and return the nutrients to the earth.25More than 1,300 species of birThe Amazon rainforest breathes life into the planet by fixing carbon and producing over 20 per cent of all the Earths oxygen. Thus, it is often known as the “l(fā)ungs of the planet”. Moreover, the Amazon rainforest is a treasure house of species that can be used for food or medicine. Yet there is one major danger to these irreplaceable plants and animals: us.26The Amazon rainforest breathesOver the past 50 years, about 17 per cent of