Unit 7 Natural Disasters.pptVIP

I. Warming Up For this section, you are required to watch a video three times. Each time you must complete an exercise with a different focus. Before watching, make yourself familiar with the following words and expressions, which will make it easy for you to understand the video. I. Warming Up Words and Expressions seismograph n. an instrument for automatically detecting and recording an earth quake 地震仪 mythology n. a body or collection of myths belonging to a people and addressing their origin, history, deities, ancestors, and heroes 神话 catfish n.鲶鱼 tectonic a.地壳构造的 mantle n.the layer of the earth between the crust and the core 地幔 collide v. come together with violent, direct impact 碰撞 friction n. the rubbing of one object or surface against another 摩擦 fault n.断层 tremor n. a shaking or vibrating movement, as of the earth 大地的震动 seismic detector n. 地震探测器 at the mercy of 任……处置；无能为力 I. Warming Up 1.1 Watch the video and decide whether the following statements are true or false. ( )(1)A quake could be happening hundreds or thousands miles away, even on the other side of the planet. ( )(2)The earth crust is divided into broad pieces called tectonic plates floating below the liquid mantle hundred miles above. ( )(3)The early Japanese invented the giant catfish to predict the earthquake. ( )(4) Modern technology has given us a new method of preparing for earthquakes-the early warning system. ( )(5) We can prevent earthquakes; we know they’re most likely to occur, so we can predict when and where they will strike. I. Warming Up 1.1 Keys: 1. T 2. F 3. F 4. T 5. F I. Warming Up 1.2 Watch the video for the second and third time and then answer the following questions. (1) Why are the Chinese thought to be unique according to the narrator? (2) Where does an earthquake usually happen? (3) At what time was Chinese first invented the seismic detector? (4) When seismic detector sent out a warning, could 20 seconds be long enough to save some people? (5) Are earthquake