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高中英语 book 6 unit4 global warming Reading人教课标高二选修 6 Unit 4In this summer, we can see these pictures on the internet…HotThe earth is becoming warmer and warmer.greenhouse gasesThey trap the heat from the sun and keep the air surrounding the earth warm, which is called the greenhouse effect1.Who wrote the magazine article? What is the name of the magazine?2. What are the names of the three scientists mentioned in the article?3.What are the two graphs about?4. What is the main topic of the article?Answer the questions. 1. Who wrote the magazine article? What is the name of the magazine?Sophie Armstrong wrote themagazine article. The name of themagazine is EarthCare.2. What are the names of the three scientists mentioned in the article? They are Dr.Janice Foster,Charles Keeling and George Hambley.3. What are the two graphs about?Graph I shows the temperature increase of one degree Fahrenheit between 1860 to ____.Graph 2 shows the carbon dio_ide contentin the atmosphere from 1957 to ____.5. What is the main topic of the article? Global warming/ the warming ofthe earth.Match the main idea of each partPart 1 (para 1) Part 2 ( para2 to 5) Part3 (para 6) Part4 (para 7)A two different attitudes towards global warming B. whether people should do sth. about global warming C. Introduce a debate over the issue of global warming D. how global warming comes about。
Unit 4 Global warming-section 1Part Two: Teaching Resources (第二部分：教学资源)Section 1: A text structure analysis of THE EATH IS BECOMING WARMER—BUT DOES IT MATTER?I. Type of writing and summary of the texthas caused the global warming or whether it is just a natural phenomenon.Many scientists believe that it is human activity that has caused the increase in the earth’s temperature. They think that the increased extra amount of carbon dioxide is trapping more heat energy, thus causing the global temperature to go up. It is believed that the levels of carbon dioxide have increased greatly over the last 100 to 150 years. However, there are some different attitudes towards the causes of this increase in carbon dioxide.On one hand, some scientists find that, over the next 100 years, the amount of warming could be as low as 1 to 1.5 degrees Celsius, but it could be as much as 5 degrees Celsius. They think that an increase of five degrees would be a catastrophe. It is possible, in their opinions, future warming would cause the sea level to rise by several meters. On the other hand, some other scientists predict that anywarming will be mild with few bad environmental consequences. They are convinced that more carbon dioxide is in fact a positive thing.What is certain is that at present no one knows what the effects of global warming will be.。
1 Unit 4 Global Warming 一、 教学对象分析 本校学生学习自主能力较强，善于思考，认真笔记。喜欢课堂环节紧凑、有序、充实学习方式，但在英语口语表达能力方面还有待提高。本课探讨全球气候变暖话题，学生在生活体验和地理知识方面，有一定的积累和初步的认知，但对于全球变暖的实质与影响了解得还不是特别清楚，有必要通过科普文教学进行探讨，增强责任意识，共同努力保护我们共同的家园。 二、 教材内容分析 〈人教版〉模块六第四单元Reading部分是一篇杂志文章，主要讲述了地球温度上升的现象和原因。20世纪中，地球的温度上升了华氏1度。这看上去是一个很小的数字，但相对于在自然界的其他现象来说，这个增长速度是迅猛的。这种现象是自然发生的还是人为的？这个问题引起了激烈的争论。许多科学家认为，这种变化是人类燃烧矿物所致。这些物质的燃烧产生以二氧化碳为主的温室气体。正因为自然界有温室气体的存在，地球才不至于很冷。但大量排放二氧化碳会使地球普遍升温。对于地球升温，科学家有不同的看法。有些科学家认为，这个问题很严重。地球升温会导致海水上涨、风暴、干旱、饥荒、物种灭绝和疫病等。也有科学家认为，地球升温有利于改善人类生活，比如，庄稼长得更快、产量更高等。文章最后以开放性的问题结尾要求读者思考：对于全球变暖，人类要不要采取措施？ 三、 教学目标 （1）分析全球气候变暖产生的原因 （2）了解科学家对于全球变暖的不同看法。 四、 教学过程 Step 1 Warming-up and lead-in (5 mins) （1）视频导入 教师选用一小段关于北极熊的视频，让学生带着问题观看视频，并由此导入到本课的课题。 T: Hello, class. First of all, Let’s watch a short video about a polar bear and please find out what happened to the polar bear. ① What happened to the polar bear? (It was drowned.) ② Why was it drowned? ( Because the ice melt.) ③ Why did the ice melt? （ Because the earth is becoming warmer.） （2）揭题 [意图说明]教师希望通过视频导入的方式能够让学生马上进入状态，注意力集中，并对本课话题Global Warming这种相对枯燥难理解的科普文产生浓厚的兴趣。 Step 2 Reading （30 mins） （1） 根据所给的分段大意，让学生通读全文进行分段，并匹配正确的四部分大意。此环节旨在让学生了解文章的篇章结构，并突出本课时重点解决的两大部分。 T ：Go through the whole text in 5 minutes and divide it into 4 parts according to the main idea of each part. （2） 阅读第一段 找出谁写了这篇杂志文章，并在文章探究什么问题。 T：This is a magazine article. Read Para.1 second line and find out who wrote the magazine article. (Sophie Armstrong )\ T: What questions does she explore in the article? ( ① How has this global warming come about? ② Does it matter? ) （3） 齐读第二段找出第一个问题的答案，并给予解释，让学生对这个长难句有清晰的理解。增强他们学习科普文的信心。 2
T： First, let’s explore the question how this global warming has come about? （ It’s human activity that has caused this global warming rather than random but natural phenomenon.） T: What’s the meaning of this sentence? ( 全球变暖是人类活动导致的，而不是随意的自然现象。) T：How has human activity caused this global warming? Do you want to know? Today we”ll explore it. （4） 读两张图表，获取基本信息，并分析图表之间的联系，让学生进一步理解课文内容。培养学生读取并分析图表的能力，提高阅读科普文的能力。 T: Have you noticed the two graphs on Page26? Let’s read the two graphs together. First, what are they about? ( Graph1: Temperature difference from long-term average,1860-2000 Graph2: Carbon dioxide content in the atmosphere, 1957-1997) T: Pay attention to the time of the two graphs. It’s clear that the period of Graph1 is longer than that of Graph2. Can we do divide Graph1 into 2 parts. The first period is before 1957. The second period is after 1957. Comparing the two parts, we know the temperature went up more rapidly. T: Now, turn to Graph2. From 1957-1997 the carbon dioxide in the atmosphere increased from about 315 parts to about 370 parts per million. It increased greatly, too. So look at the same years of temperature, compared to the years of CO2, you can see, they both went up rapidly. Can you find some relationship between them？（ The more CO2, the higher temperature.） （5） 通过将第三段分解阅读，降低科普文阅读难度，帮助学生更好地理解全球变暖，温室效应，温室气体等专业术语的理解，并进一步解决本课难点。 T : ①Why does more CO2 cause higher temperature? ②Have you learnt something from your Geography teacher? Will you share it with us? If you have difficulty in speaking in English, you can try it in Chinese. ( 温室气体，温室效应…….) ③What is greenhouse effect? Para3 Line24-36 will help you. ( Greenhouse gases trap the heat of the sun and therefore warm the earth. It is known as greenhouse effect.) ④ What are greenhouse gases? ( Gases like carbon dioxide, methane and water vapour) ⑤ Is “greenhouse effect” beneficial or harmful to us? ( It is harmful.) ⑥ Why? ( The earth is becoming warmer and warmer.) ⑦ Without the greenhouse effect, what would the earth be like?( It would be thirty-three degree Celsius cooler than it is.) ⑧ T: So we need the greenhouse gases. They do good to us. However, when we add huge quantities of extra carbon dioxide into the atmosphere. What will happen? ( More heat energy tends to be trapped in the atmosphere causing the global temperature to go up.) ⑨ Why is extra carbon dioxide added into the atmosphere? Read Para3 Line18-23 and Para.5, and you will find the answer. （ It is the burning of more and more fossil fuels that has resulted in this increase in carbon dioxide. The increase in carbon dioxide resulted in the increase in the earth’s
