A Complete Collection of 100000 Whys
Fav十万个为什么
为什么春天会来临？
1、春天来临是因为地球绕太阳公转的轨道导致太阳直射点逐渐北移，使得北半球的日照时间变长，温度升高。
2、随着太阳辐射增强，冰雪融化，土壤解冻，为植物生长提供了必要的水分和温度条件。
3、春天的到来伴随着大气环流的变化，冷暖气流交汇频繁，导致天气多变，但也带来了雨水，促进了植物生长。
4、许多动植物的生物钟对季节变化非常敏感，春天是它们繁殖和迁徙的高峰期，这也是春天生机勃勃的表现。
5、从地质和天文角度来看，地球的轴倾角和公转轨道的椭圆度导致季节变化，春天是北半球向温暖季节过渡的阶段。
总之，春天来临是地球轨道、太阳辐射、大气环流、生物节律和地质天文因素共同作用的结果，是自然界周期性变化的重要体现。
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