大学英语精读第三版第二册U5教案.doc

Unit 5 The Villain in the AtmosphereTeaching Time: 8 hoursStudents l'evel: non-English majors of the second semester of the 1st year.Teaching Objectives:1. Get Ss to know the conditions of the pollution on earth; let the students realize the serious pollution of the earth; analyze the causes of the pollution on the earth; think over and discuss the ways to solve the issue.2. About the text, Ss should grasp the text content, text structure, basic vocabularies and required grammar points of the section.Words: atmosphere, compose, conclusion, conference, crash, deadly, emit, extremely, feasibility, fund hazard, indicate, originally, pollute, proceed, signal, smash, survive, type, unfitPhrases & Expressions: be known as, name after, as to, base on, for one thing...for another, be composed of, as far as sth/sb. be concerned, stick up, give up, set backGrammar: because of, what do you think of, so/as far as...he concerned3. About the reading, Ss should acquire the reading skill — using word part clues for word meanings.4. About the writing, Ss should get to know the writing skill — coherence.5. About the listening, Ss will finish the Unit 5 directed by the teacher. Teaching Procedures:I. Pre-reading ActivitiesBackground information:1. GlaciersGlacier,an enduring accumulation of ice, snow, water, rock, and sediment (沉淀物) that moves under the influence of gravity. Glaciers form where the temperature is low enough to allow falling snow to accumulate and slowly transform into ice. This accumulation is most common in the polar regions, but can also occur at high altitudes on mountains even near the equator. Glaciers are complex systems that grow and shrink in response to climate. At the present, glacier ice covers about 15 million sq km (5.8 million sq mi), or 10 percent, of Earth area.2. Polar ice capA polar ice cap is a high-latitude region, centered in the polar region, which is covered in ice.3. GreenlandAn Arctic island nation located in North America by geography, Greenland is a self-governed Danish territory. It is the world 'lasrgest island, and about 81 percent of its surface is covered by ice.4. Global WarmingGlobal warming refers to an average increase in the Earth's temperature, which in turn causes changes in climate. A warmer Earth may lead to changes in rainfall patterns, a rise in sea level, and a wide range of impacts on plants, wildlife, and humans. When scientists talk about the issue of climate change, their concern is about global warming caused by human activities.5. ManhattanManhattan is one of the five boroughs that comprise the City of New York. It is by far the most densely populated county in the United States and famous for its soaring skyscrapers.Manhattan (Island) is one of the commercial, financial, and cultural centers of the world. It has many famous landmarks and tourist attractions. They include Broadway, Chinatown, the Empire State Building, Greenwich Village, Times Square, The United Nations Headquarters, Wall Street, and many churches, colleges, skyscrapers, and theaters. Most of New York 'ms unicipal buildings stand on Manhattan Island. When people think of New York City, they are usually thinking of Manhattan, the core of the city.6. The British IslesThe British Isles are s group of islands off the northwest coast of Europe consisting of Great Britain (that is England, Scotland and Wales), Ireland and the many smaller adjacent islands. These islands form an archipelago of more than 6,000 islands.7. Isaac AsimovIsaac Asimov was born on 2 January 1920 in the former Soviet Union, but grew up in Brooklyn, New York. He taught biochemistry at Boston University until he retired in 1958 to become a full -time writer. Asimov had been publishing short stories since the late 1930s, and in 1952 published his first no vel. The author of the classic , Robot series an dThe Foundation Trilogy, Asimov wrote more than 400 books and won every major science fiction award. He also wrote popular books and essays on science and technology, earning him the nickname "The Great Explainer."Isaac Asimov died of “ heart and kidney failure, which were complicationsof the HIV infection ” on 6 April 1992. HIV was not revealed as the cause of his death until 2002, when his widow Janet published the memoirs It's Been a Good Life.Warm-up Questions1. What' tshe weather like in your hometown? Do you like it? Why or why not?2. Have you ever noticed any changes in your hometown or in the city you ' re now living in? What are they?3. Do you have any idea of the greenhouse effect? How does it affect the temperature on Earth?Introductory Questions for Reading Comprehension1. Who is the “ villain ” in the atmosphere?2. What does carbon dioxide do to plants and animal life on the Earth?3. What is happening to the sea level? What will the rising sea level do to our life?4. What does carbon dioxide do to the temperature of the Earth?5. How come 。