The Complete Book of 100,000 Reasons Why
Favlit. ten thousand reasons why
为什么天会下雨呢？
天会下雨，主要基于以下几个原因：
1、水蒸气的蒸发与上升：地球表面的水体（如江河、湖泊、海洋）在太阳光的照射下蒸发，形成水蒸气。这些水蒸气随着空气上升，进入高空。
2、冷却与凝结：水蒸气上升到高空后，遇到冷空气，温度降低，水蒸气凝结成小水滴，形成云。这个过程是水蒸气从气态变为液态的相变。
3、重力作用与降水：云中的小水滴不断聚集并增大，当水滴重量超过空气的托力时，便在重力的作用下从云层中降落，形成降雨。
总结：天会下雨的原因主要是水蒸气的蒸发与上升、冷却凝结成云，以及重力作用使水滴降落。这些过程共同作用，形成了降雨现象。
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