unit5The_Power_of_Nature课件33(人教版选修6).ppt

Unit 5 The Power of Nature 人教新课标选修六 Remember what happened on Dec 26, 2004? tsunami Do you know any other natural disasters ? Please work with your partners and make a list of natural disasters . Warming up earthquake floods drought thunder/ lightning tornado/cyclone hurricane /typhoon volcano-eruption What do you know about volcano? Do you know how a volcano erupts? volcano-eruption Boiling rock erupts from the crater; the lava flows slowly down the mountain. Magma chamber Lava Crater Ash cloud/volcanic ash More about the volcano 1. How is a volcano formed? The rocks under the earth become hotter and hotter and erupt from the mountain. Near the oceans. Where is most possible for a volcano to erupt? An extinct volcano Haleakala Crater, the largest dormant volcano in the world Maui, Hawaii An active volcano 3. What types of volcanoes do you know? dormant volcano active volcano (=one that may erupt at any time) dormant volcano (=one that is not active at the moment) extinct volcano (=one that is no longer active at all) What qualities are needed for a volcanologist? Are you suitable for being a volcanologist ? Answer “yes”or “no” to the following questions. Pre-reading Questions Yes No 1 Do you like working outside as well as inside? 2 Do you enjoy travelling to unusual places? 3 Do you enjoy taking risks? 4 Do you dislike doing the same thing every day? 5 Do you like adventure in your life? 6 Are you interested in studying rocks and other things that make up the surface of the earth? I would like/ wouldn’t like to be a volcanologist because... An Exciting Job Reading What is the writer? When did he first see an eruption? How did it look like? What was he wearing when getting close to the crater? And what was the result? Skim the text and answer the following questions: What is the writer? When did he first see an eruption? How did it look like? He is a volcanologist working for the Hawaiian Volcano Observatory. He mainl