Unit 3 Reading and Thinking -ppt课件 --(2022)高中英语新人教版（2019）选择性必修第三册.pptx

1、Unit 3 Environmental Protectionglacier(s)/ice sheetice breaking offEarth provides enough to satisfy every mans needs,but not every mans greed.“莫罕达斯莫罕达斯卡拉姆昌德卡拉姆昌德甘地甘地（Mohandas Karamchand Gandhi，1869.10.21948.1.3010.21948.1.30），），尊称尊称“圣圣雄甘地雄甘地”（Mahatma Gandhi），），印印度民族解放运动度民族解放运动的领导人、的领导人、印度国民印度国民大会党大会

2、党领袖。领袖。Look&Predict:1.What is the text mainly about?Pre-reading？It is mainly about global climate change.Before you read,look at the graph and the picture below and discuss these questions in groups.2.What is the graph about?What information can you get from it?1 1Pre-readingtemperature anomaly温度距平值

3、温度距平值是某一系列数值中的某一个数值与平均值的差，分正距平和负距平。平均气温距平就是一系列平均气温（日平均气温、月平均气温等）与总平均气温的差值。平均气温距平增高就是说明这个差值增大了，相应时间段内的温度出现了异常。Earth is getting warmer and warmer.3.What happened to the polar bear?Pre-readingA:The polar bear appeared to have starved to death because it could not find enough to eat.Before you read,look

4、 at the graph and the picture below and discuss these questions in groups.1 14.Why the author write about it?Pre-readingA:Because it could show one of effects of rising temperatures due to climate change.Before you read,look at the graph and the picture below and discuss these questions in groups.1

5、1Read&Think:paragraphs and their main ideaPre-reading？Earth is getting warmer and warmer&evidence.Para.1The evidence(alarming cases)of climate changePara.2The cause of rising temperaturePara.3The effect of rising temperaturePara.4Solutions to reducing greenhouse gas emissionPara.5Read&Think:The stru

6、cture and text typePre-reading？evidencePara.1evidence Para.2causePara.3effectPara.4solutionsPara.5phenomenaExposition writingRead para.1-2&Think:Use a mind map to list the evidence of climate change While-reading1 1Climate changeLow sea-ice levelsBears could not huntIts dead body foundStarved to dea

7、thHad to travel longer distance to find foodRead para.3&Think:2 2While-reading1.Why is the“natural”greenhouse effect important and necessary?A:The“natural”greenhouse effect is important because it warms the Earths surface and keeps it habitable.A:High greenhouse gas emissions lead to more heat energ

8、y being trapped in the atmosphere and rising temperatures.Read para.3&Think:2.What are the consequences of high greenhouse gas emissions?2 2While-readingSummary mind map:Whats the cause of Greenhouse Effect?2 2While-readingGreenhouse EffectNaturalKeeping Earths climate warn and habitableMan-madeCaus

9、ing Earths surface temperature to rise quickly if too much heat energy is trapped3.Why did the author mention the climate scientists warning?A:The author mentioned the climate scientists warning because he/she wants to know the importance of environmental protection and use warnings to catch peoples

10、 attention.Read para.4&Think:While-reading3 3A:The authors purpose is to appeal to peoples awareness of environmental protection and inspire us to take action/measures.Read para.5&Think:While-reading4 44.What is the authors purpose of writing this text?Read para.5&Think:While-reading5 55.What are th

11、e consequences of the global temperature rise?A:The rise in temperature led to extreme weather/natural disasters(such as extreme rainstorms,heat waves),which results serious damage,costing human lives,economic losses.WHAT IS A CARBON FOOTPRINT?From cooking a pot roast to jetting away for the weekend

12、,the choices you make in your day-to-day life leave a mark on the environment.A carbon footprint is defined as thetotalamountofgreenhousegasesproducedtodirectlyandindirectlysupporthumanactivities,usually expressed in equivalent tons of carbon dioxide(CO2).Post-readingCreate a diagram describing how

13、the greenhouse effect works.5 5Draw a diagramDiagrams 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.When you read an essay about scientific issues,you can try drawing a diagram,which will not only allow you to visualise the problems more clearly but also can help demonstrate your creative thinking and problem-solving.Post-readingPost-readingWhat else can we do to reduce climate change?