Unit 3 Environmental Protection Reading and Thinking 课件-2024-2025学年高中英语人教版（2019）选择性必修第三册

Environmental Protection Reading and thinking Unit 3 Do you like polar bears? But this is what polar bears are really like! Leading in What caused the polar bear’s death? food shortage losing living space/habitat Global Surface Temperature：1920-2016 Base Period -0.2 1928 1936 1944 1952 1994 1992 2000 2008 2016 0 0.4 0.8 1 1920 Global warming What is the graph about? What information can you get from it? Teaching objectives By the end of the class: Students can understand the passage to know more about the climate change and learn some new words and phrases. Students can analyze the structure of the passage and improve their reading abilities including skimming, scanning and careful reading. Students can solve problems by both self-thinking and cooperating. Students will be aware of the importance of environmental protection and take action to do it. 6 pre-reading A. News report What's the type of this text? B. Biography(传记） C. Expository essay（说明文） 本文是一篇说明文。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，因此说明文以客观、准确为基本要求，强调科学性和客观性。 Analyze the topic sentences to figure out the structure of the text. Fast-reading We have known about climate change for decades… In 2013,a lot of people were shocked by a news photo of a dead polar bear that was found on Norway's Arctic island of Svalbard… Then what is causing the increase in the global average surface temperature? … There is strong and comprehensive evidence that the rise in temperature has led to an increase in extreme weather… Continued greenhouse gas emissions will result in further warming and long-lasting changes to the global climate… Skim and analyze the structure of the text. Para 1 Para 2 Para 3 Para 4 Para 5 problem cause/reason Result/influence measures Fast-reading Global warming 本文按照“现象—原因—危害—措施”的逻辑顺序展开，环环相扣，步步深入。 Read para 1 and summarize evidences of climate change We have known about climate change for decades. There is little doubt that Earth is getting warmer and warmer(see the graph).A warming ocean and atmosphere along with melting ice and rising sea levels provide evidence of a dramatic change in the global climate. Careful-reading 3 The following reasons explain the death of the polar bear. Read paragraph 2 and put them in a correct order. Careful-reading low sea-ice level starvation travel greater distances to find food can’t hunt seals climate change What is the root cause? Read para3 and finish the mind map. Then what is causing the increase in the global average surface temperature? Climate scientists often mention a key climate process called the " green house effect", which has two common meanings: the "natural" green house effect and the "man-made" green house effect. The "natural " green house effect refers to the fact that heat from the sun enters the atmosphere and warms Earth's surface as short-wave radiation. The heat is released back into space at longer wave lengths. Greenhouse gases in the atmosphere, such as methane and carbon dioxide, trap some of the heat, keeping Earth's climate warm and habitable. Without this process, Earth could not sustain life. However, the "man-made " green house effect has now become a big problem. When people produce huge amounts of extra greenhouse gases by burning fossil fuels, more heat energy is trapped in the atmosphere and causes Earth's surface temperature to rise quickly. Careful-reading Read para 3 and finish the mind map. Careful-reading greenhouse effect "natural" greenhouse effect From Cause "man-made" greenhouse effect From Cause heat from the ____ _____ Earth's surface burning ________ Earth's surface temperature _____quickly ______ life Read the diagram describing how the greenhouse effect works. Careful-reading atmosphere light Reflected sunlight enters the atmosphere Heat released back into space Heat reflected back to Earth’s surface Step 2 Step 3 Step 3 Step 1 Diagrams are very useful tools that can be used to brainstorm ideas, map out processes, show cause and effect relationships, explain a new idea or concept, and so on. Draw a diagram 绘图表 Read para 4 and finish the mind map. Careful-reading There is strong and comprehensive evidence that the rise in temperature has led to an increase in extreme weather and natural disasters worldwide, not only causing serious damage, but also costing human lives. Climate scientists have warned that if we do not take appropriate actions, this warming trend will probably continue and there will be a higher price to pay. In fact, news reports are frequently broadcast about extreme rainstorms and heatwaves causing deaths and economic losses. Global warming extreme weather natural disasters serious damage, costing human lives extreme rainstorms, heatwaves lead to lead to results examples ? ? ? ? What are the influences of the global temperature rise? Read para 5 and finish the mind map. Careful-reading Continued greenhouse gas emissions will result in further warming and long-lasting changes to the global climate. This requires the attention of people all over the world. Governments need to consider making policies and taking appropriate actions and measures to reduce greenhouse gas emissions. We as individuals can also reduce our "carbon footprint“ by restricting the amount of carbon dioxide our lifestyles produce. It is our responsibility to seize every opportunity to educate everyone about global warming, along with its causes and impacts, because this is the most serious issue affecting all of us on this planet. So what will you do to help? measures governments individuals make policies take appropriate actions and measures reduce our “carbon footprint” by… educate everyone about global warming ? ? ? ? Important phrases: Summary 了解 气候变化 随着、与…一起 被…震惊到 似乎，好像 对…有影响 指的是 维持生命 被困于 climate change know about along with be shocked by appear to have an impact on refer to sustain life be trapped in Important phrases: Summary 不仅…而且… 导致 制定政策 采取措施做某事 减少温室气体的排放 lead to not only … but also… make policies take measures to do reduce greenhouse gas emissions Summary: Grammar Practice According to the graph, we can see that Earth is getting warmer and warmer. In 2013, a lot of people 1.were shocked(shock) by a news photo of a dead polar bear, 2. which appeared to have starved and died. Experts claimed that low sea-ice levels 3. caused(cause) by climate change meant the bear could not hunt seals as before. This 4.alarming (alarm) case showed how the increase in temperature had an impact 5.onEarth's ecology. About the causes of the increase in the global average surface temperature, climate scientists mention a key climate process called the "greenhouse effect", and the "man-made" greenhouse effect has now become a bis problem. When people produce huge 6.amounts (amount) of extra greenhouse gases by burning fossil fuels, more heat energy is trapped in the atmosphere and causes Earth's surface temperature to rise 7. quickly (quick). The rise in temperature has led to 8.an increase in extreme weather and natural disasters worldwide. It causes serious damage and costs human lives and there will be a higher price 9 to pay_(pay). Therefore, this question requires the attention of people all over the world. Governments and individuals both need to take appropriate measures to reduce greenhouse gas emissions. At the same time, we should educate everyone about global warming, along with its causes and impacts, 10.because _this is the most serious issue affecting all of us on this planet. Post-reading: Discussion Talk about what you can do about global warming. Sort the garbage Abate/reduce the use of plastic bags Value our own role End wasting resources Encourage others to participate in it Alter/change our lifestyle Ride a bike or walk to school Turn off the power when not in use Help promote environmental protection S A V E E A R T H S A V E E A R T H 地球能满足人类的需求，却满足不了人类的贪婪。 Homework Complete the grammar practice; Write a short essay about climate change (including problems, causes, influences and measures )by using what we have learned this class. Lavf58.20.100 Packed by Bilibili XCoder v2.0.2 Lavf58.20.100 Tencent CAPD MTS Multimedia Cloud Transcode (cloud.baidu.com) Content Adaptive Encoding 3.0 $$