1、tornado,软 工 121 刘 斌 鹏,What type of air is needed to form a tornado? Cold Moist Dry All of the above,The answer is D. All of above. It is a combination of these conditions that spawn storms.A vortex forms and grows as these wind currents flow past one another.They rotate faster and faster until a spi
2、raling wind reaches down from the clouds.To be classified as a tornado,the rotating column of air must stretch from the cloud base to the ground.,The characteristics of tornado Tornadoes often occur in the summer thunderstorm weather, especially in the afternoon and evening most common. Small scope
3、of attacks, the diameter of tornadoes in general a few hundred meters to 10 meters between. Tornado survival time normally only a few minutes, the longest more than a few hours. Wind particularly great in the wind speed near the center up to 100-200 m / s. Strongly destructive, after the tornado, up
4、rooted trees often occur, destroyed buildings, and other phenomena, and sometimes the people sucked out, and very serious harm.,Calm After the Storm,Beach, Before Landfall,What part of the world gets hit by the most tornado?,Cleanup Underway,Ground Zero, Again,Sea Wall,Troubled Water,According to st
5、atistics, every land there were tornado country, which the United States is the largest country in a tornado.Each year more than 1000 tornados touch down in the United States. Canada, Mexico, the United Kingdom, Italy, Australia, New Zealand, Japan and India, and other countries, there will also be many opportunities for tornado.,In the face of nature. Mankind is very weak.In order to reduce the occurrence of natural disasters and the environment further deterioration!We need to protect our environment!Thank you!,
