资源简介

Book3 Unit3 Environmental Protection Reading and Thinking:
Climate Change Requires the World's Attention
教材分析：
本课是选择性必修三第三单元的 reading and thinking 部分，以“讨 论全球气候变化”(Discuss climate change)为活动主题，引导学生探讨全球 气候变暖的表现、原因、后果以及需要采取的应对措施。改变自己的生活方式以 减少碳排放，对公众进行相关的宣传教育，这是生活在地球上的个体可以采取的 行动。通过完成阅读理解活动，学生了解极端气候变化的背后成因，认识人类的 活动对全球气候产生的巨大影响，反思自己的行为，进而懂得如何减缓气候变暖 的进程，从自身做起，成为具有全球视野的有责任和担当的人。本课文本是一篇 说明文。说明文是客观说明事物的一种文体，以解说或介绍事物的形状、性质、 成因、构造、功用、类别等为主要内容。说明文主要通过对客观事物或事理的介 绍说明，达到以知识教人的目的。与记叙文、议论文相比，说明文更强调科学性 和客观性。说明文以客观、准确为基本要求，一般不表达作者的感情倾向。该文 本以现在时态和将来时态为主，强调文章的现实意义以及对将来不利后果的预测。 o文本通过时态的恰当运用，引起读者对气候变暖的关注，从而认同作者的观点 并采取行动该文本结构清晰，按照“现象一原因一危害一措施”的逻辑顺序展开， 环环相扣，步步深入。
文本的标题 Climate Change Requires the World's Attention点明了作者的诉 求：气候变化对地球生态系统的影响是巨大的，需要全人类共同关注和面对。作 者首先使用统计图表直观展示气候变化的趋势，同时使用饿死的北极熊的例子和 照片来具体说明气候变暖的影响，从而帮助读者初步感知气候变暖给地球带来的 负面影响。文本第三段探讨气候变暖背后的原因。人类在生活和生产中燃烧大量 化石燃料，过量排放的二氧化碳形成人造温室效应，使得地球表面温度上升。按 照逻辑顺序，第四段分析气候变暖的后果，即气候变暖使全球极端天气和自然灾 害出现频次增加，造成人员伤亡和巨大的经济损失。在文本的最后，作者呼吁世 界各国政府携起手来，共同制定政策，采取措施减少温室气体的排放，同时，也 号召个人减少生活中的碳排放，宣传气候变化知识。因此，本节课的教学重点是 引导学生观察并掌握说明文的结构特征；指导学生用示意图展示温室效理；启发 和鼓励学生改变生活方式，减少碳排放，同时提出改善性的建议与对策。
课堂导学案
【Learning Objectives 学习目标】
By the end of this class,you will be able to
1.know the causes and consequences of climate change.
2.explore practical ways to address (处理) climate change.
3.figure out effective information on graphs and diagrams. 【Learning Procedures 学习过程】
Stepl Lead-in
1.What happened to the earth
Step2 Pre-reading
Look at the graph and the photo.1.What information can you get from it
Step3 While-reading
Read for the structure and main ideas. 1.What is the type of this passage
A.Argumentation B.Narration C.Exposition D.Advertisement 2.What aspects are included in the following essay
Match the main idea with each part.
Part1:(para.1-2) The consequences of the rise in temperature
Part 2:(para.3) The causes of the increase in the global average surface
temperature
Part 3:(para.4) The solutions to reducing greenhouse gas emissions
Part 4:(para.5) The evidence of dramatic climate change that had an impact on
Earth's ecology
Read for details.
Read paragraph 1 and paragraph 2 and answer the following questions. 1.What evidence of climate change can you find
Evidence l Evidence 2 Evidence 3 Evidence 4
2.Can you describe how climate change has influenced the polar bear's life
Climate change→
Read paragraph 3 and answer the following questions.
1.What is causing the increase in the global average surface temperature
2.What is the definition of “natural”greenhouse effect
Heat from the sun enters the and warms Earth's as
radiation.
3.What is the function of“natural”greenhouse effect Keeping Earth's warm and
4.What is the definition of“man-made”greenhouse effect
People produce huge amounts of greenhouse gases by burning
5.Why is the“man-made”greenhouse effect a big problem
More energy is trapped in the atmosphere and causes Earth's surface temperature to quickly.
6.Can you tell us which diagram describes the natural greenhouse effect Why Read paragraph 4 and answer the following questions.
What are the consequences of the global temperature rise
The rise in the temperature led to and causing not only but also
Examples include and
Read paragraph 5 and answer the following questions. What are the solutions to reduce greenhouse gas emissions
The governments need to and We as individuals can and
Step4 Post-reading Group discussion
As students,what can we do to reduce our“carbon footprint” Summary
There is enough evidence 1. Earth is getting warmer and warmer. According to an expert 2. has studied polar bears for many years,the bear found on Norway's Arctic island of Svalbard appeared 3. (starve) and died. This alarming case showed how the increase in temperature had an impact 4. Earth's ecology.The “natural”greenhouse effect can make Earth 5. (sustainable)life.6. the man-made”greenhouse effect has now become a big problem,7. (cause)Earth's surface temperature to rise quickly. Climate scientists have warned that if we don't take appropriate 8. (action), this warming trend will probably continue.It is our 9. (responsible)to seize every opportunity to educate everyone about 10. (globe)warming.
Homework
1.Summarize the whole passage by retelling the essay.
2.Make a poster about how we can do to balance our needs and sustainable
nature.
Let's keep the words in mind:
1.Only by changing the way we treat the environment can we get along well with it.Only by saving the environment can we save ourselves.
只有改变我们对待环境的方式，我们才能和谐相处。只有拯救环境，我们
才能拯救自己。
2.Lucid waters and lush mountains are valuable as "mountains of gold and
silver".
绿水青山就是金山银山。
3.If we don't save water,the last drop of water will be our tear. 如果我们不节约用水，那么最后一滴水将会是我们的眼泪。
4.When the sky becomes blue again and the rivers become clean,we'll live a healthier and happier life.
当天空再次变得湛蓝，河水变得清洁，我们会过上更健康、更快乐的生活。 Useful information of an expository essay
1.Structure:
Phenomenon
Causes
Consequences Solutions
2.Language features:Graphs,photos
Definition Examples Comparison Quotation
Questions and answers

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