英语：Unit4《Earthquakes》课件-Warmingup（新人教版必修1）.ppt

1. Do you know what would happen before an earthquake?-There is often a great sound. -Animals too nervous to eat-There are bright lights in the sky.-A smelly gas may come out of the well.-Water pipes may crack or burst.2. What do you think may happen before an earthquake?Before an quake, animals will become nervous. Cows, pigs, horsesand dogs will be upset. Mice will run about and fish will jump out of water. In winter, people can even see snakes. So earthquake is predictable.3. Imagine there has been a big earthquake,what will happen to the things around us?cracks, cut across houses, roads and canals, fall down, lie in ruins, destroy, damage, lossNatural disasters occur throughout the world, and China has a particular problem with earthquakes. Tangshan earthquake in 1976 is a case in point. So it is especially important to take steps to reduce the damage caused by quakes.the person who studies quakes.the machine to record seismic waves. the inventor of the 1st seismologySeismologist:Seismometer:Zhang Heng in Han Dynasty:the study of Quake recordingsSeismology:Talk about a bigearthquake thathappened in theworld with yourpartner.