题目内容

对比“世界主要山脉分布图”,完成下列问题。
 
(1)世界上高大山脉的分布地带与火山地震带的分布是否一致?为什么?
                                                                                                                                                                 
                                                                                                                                                                 
(2)我国哪些地区多火山地震?为什么?
                                                                                                                                                                   
                                                                                                                                                                   
(3)尝试解释我国东部地区山脉的延伸方向为什么与海岸线相平行?
                                                                                                                                                                   
                                                                                                                                                                   
(1)分布是一致的。因为高大山脉的形成基本上是板块挤压形成的,都在板块的交界地带。而板块交界地带地壳不稳定,也正是火山地震的多发地带。
(2)我国的太平洋沿岸地带、喜马拉雅山、昆仑山地带多火山和地震,它们正好处在地球上环太平洋火山地震带和地中海- 喜马拉雅地震带上。
(3)我国海岸线基本上处于太平洋板块和亚欧板块的交界地带,两大板块互相挤压,形成了东部山脉。
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