(
课件网) Unit 2 Saving the Earth Topic 2 All these problems are very serious. Section C 掌握环境问题相关的单词和短语: hole, form, rise, oxygen, ozone layer, radiation, directly, carbon dioxide,blanket, escape, the greenhouse effect, refer, during this period, take away, pass through...等. 2. 能谈论环境污染的危害，提出保护环境的建议。 3. 能阅读和分析文章，迁移运用，以读促写，完成保护环境相关的一篇短文。 Learning aims: Pre-reading What environmental problems can we see in this video What caused it The global warming.（全球变暖） Mainly the greenhouse effect. The greenhouse effect is changing the climate of our earth because of too much carbon dioxide. the greenhouse effect 温室效应 carbon dioxide /'kɑ:b n da 'ɑ:ksa d/ n. 二氧化碳 拓展：affect v. 影响 There is a big hole in the ozone layer so that lots of radiation passes through the air and does harm to the earth directly. ozone layer /' uz un 'le / 臭氧层 radiation /re d 'e n/ n. 放射，放射物 拓展：radiate v. 辐射 1. take away 2. oxygen 3. hole 4. ozone layer 5. radiation 6. directly 7. carbon dioxide New words 拿走 n. 氧气 n. 洞，坑 臭氧层 n. 放射，放射物 adv. 直接地 二氧化碳 8. form 9. blanket 10. escape 11. rise 12. the greenhouse effect 13. refer to v. （使）出现；（使）形成 n. 种类；形式 n. 毛毯，毯子 v. 渗出；逃跑；逃脱 v. 上升；起床；升起 温室效应 提到，涉及，有关 While-reading 1a Read and understand. Look at the following pictures and predict the main idea of the passage. fewer trees factory pollution traffic pollution the ozone layer more carbon dioxide 1b Choose suitable titles for Paragraphs 2-6. Then write it down in front of each paragraph. Task 1 A. Traffic pollution B. Factory pollution C. Fewer trees D. The ozone hole E. More carbon dioxide D C A B E Task 2 Read the passage and choose the best answer. 1.What does our planet mean here （Para.1） A. The sun. B. Mars C. The moon. D. The earth. 2.In the passage, blanket refers to ____.（Para.6） A. carbon dioxide around the earth B. the ozone layer in the sky C. the forests around the world D. pollution all over the world 3.The word it in Paragraph 5 refers to ____. A. CO2 B. O3 C. O2 D. H2O 4.What is the best title for this passage Environmental Problems B. Pollution on the Earth C. Hope for the Future D. The Greenhouse Effect Tip:主旨大意题，需要统观全文，不能以偏概全。 Tip:细节理解题，代词从前面内容中寻找答案 1. 在地球上/究竟，到底 _____ 2. 在这段时间 _____ 3. 拿走 _____ 4. 许多种类的 _____ 5. 对......重要 _____ 6. 穿过 _____ 7. 温室效应 _____ 8. 从......逃走 _____ 9. 导致癌症 _____ 10.涉及.../有关.../提到... _____ on the earth/on earth during this period take away many kinds of be important to/for pass through the green house effect escape from cause cancer 导致某人做某事：cause sb. to do sth. refer to sb./sth. The earth is 4.6 billion years old. We humans have lived on the earth for only 35 000 years, but during this period, we have changed our planet a lot in many ways. So ... ...
