(修订版) Advanced English Unit 1 Book 2 高级英语II 教学课件.ppt

Advanced EnglishUnit 1 Book 2 Hurricanes/ location/ naming system/ typhoon A violent tropical storm in which winds attain speeds greater than 75 miles per hour, the term is often restricted to those storms occuring over the North Atlantic Ocean. Hurricanes usually form over the tropical North Atlantic Ocean and matures as they drifted westward. Hurricane usually form off the west coast of Mexico and move northeastward from that area. An average of 3.5 tropical storms per year eventually mature into hurricanes along the east coast of North America, usually over the Caribbean sea of Gulf of Mexico. Hurricanes are often given girl’s names and typhoon are given serial numbers. The National Weather Service of the United States had used girl’s names to identify hurricanes in the Atlantic, Carribbean, and Gulf of Mexico since 1953 and the names were given in alphabetical order. The practice of giving girl’s names to hurricanes changed recently. In 1980, a hurricane was given a man’s name and was called hurricane David. Hurricane season beginsJune 1 and ends Nov. 30. Teaching Aims 1) To familiarize students with the knowledge of hurricane . 2) To help students to learn the words and phrases used to describe the hurricane, in terms of the storm, rain, wind, water, destructive force. Background knowledge Hurricane Camille Hurricane Camille is said to be the worst storm ever to hit mainland United States. With winds in excess of 200 mph and tides over 20 feet, Hurricane Camille smashed into the Mississippi Gulf Coast on Sunday night, the 17th of August and