(课件网) Unit 3 Environmental Protection Period 3 Reading and Thinking After this class, you will: l. To learn more about different environmental issues. 2. To analyse the cause and effects of global warming. 3. To draw a diagram describing how the greenhouse effect works. Learning Objectives What’s the environmental problem in the video Lead-in What other consequences may global warming bring about Brainstorm Pre-reading starved to death What might be the story behind it What is the graph about What information can you get from it Pre-reading The story may be that the polar bear suffered from the increasing global temperature. Pre-reading Pre-reading shows how much the temperature has risen above what it would usually be at a base level. Reading Skimming 1. What's the type of this text 2. What's its purpose 3. In which part of a newspaper or magazine may we find this passage 1. What's the type of this text A. Essay 论文 B. Biography 传记 C. Exposition. 说明文 D. Argumentation. 议论文 2. What's its purpose To inform readers to deal with climate change To persuade readers to focus on limited resources 3. In which part of a newspaper or magazine may we find this passage A. Entertainment B. Economy C. Education D. Environment Skimming 1. What happened to the polar bear in the photo Why did the writer write about it 2. Why is the “natural” greenhouse effect important and necessary 3. What are the consequences of high greenhouse gas emissions 4. Why did the author mention the climate scientists’ warning 5. What is the author’s purpose of writing this text Reading for details Keys: 1. The polar bear in the photo died of starvation. The writer wrote about it because it showed one of the effects of rising temperatures due to climate change. 2. The “natural” greenhouse effect is important because it warms the Earth’s surface and keeps it habitable. 3. High greenhouse gas emissions lead to more heat energy being trapped in the atmosphere and rising temperatures. 4. Because the writer wanted to warn us of how urgent it was for us to take appropriate actions. 5. To arouse our awareness of the problem and encourage us to take appropriate measures to deal with global warming. Reading for details Para 1-2 Para 3 Para 4 Para 5 The evidence of dramatic climate change that had an impact on Earth's ecology. The cause of the increase in the global average surface temperature. The consequences of the rise in temperature. The solutions to reducing greenhouse gas emissions Reading for structure problem cause consequences solutions Part 1: Problem The _____ is getting warmer and warmer. Evidence 1: _____ Evidence 2: _____ Evidence 3: _____ Earth a warming ocean and atmosphere melting ice rising sea levels climate change climate change starvation longer food-seeking travel lack of food low sea-ice level The following reasons account for the death of the polar bear, with one influencing another. Read paragrap ... ...
