高中英语 Unit 5 The power of nature Section Ⅰ Warming amp；Reading Pre-reading教学案 新人教版选修6-新人教版高二选修6英语教学案

Unit 5 The power of natureMount Kilauea, the world's most active volcano, is on theisland of Hawaii. It is notfar from Mauna Loa, the largest volcano in the world. Mauna Loa and Kilauea together form the Volcanoes National Park in Hawaii. Mount Kilauea has produced lava (熔岩) more than fiftytimes in the last one hundred years. At this moment, red hot lava is pouring out of Kilauea. It has been doing this since 1983. Sometimes the lava moves slowly. At other times it poursout very fast asa huge amount of pressure (压力) forces it from the volcano. During these times, it moves almost as quickly as water moving down the side of a mountain. Sometimes Kilauea produces a large amount of lava that seems like rivers of fire. When the lava from Kilauea reaches the ocean, its fierce (凶猛的) heat produces a great amount of steam that rises into the air. The lava is so hot it continues to burn underwater for some time. The lava from Kilauea continues to addland to the island as the volcanoes of Hawaii have always done.It was these volcanoesthatformed the islands of Hawaii. Most of the time the lava of Kilauea seems to move peacefully toward the ocean. Yet it is not as peaceful as it seems from a distance. In recent years the lava destroyed one small town on theisland. The liquid (流动的) rock slowly covered the town. It blocked roads and destroyed them. Nothing can stop the lava of Kilauea. Experts say the volcanoes of Mauna Loa and Kilauea are a serious threat (威胁) to property on many parts of the island. They also say the volcanoes of the island of Hawaii are proof that the changing environment of Earth is and will always remain beyond human control.1Section_ⅠWarming Up & Rea...