【精品】六年级上册科学课件：3.5 为什么会有雨和雪 人教版 (共8张PPT).pptx

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1、为什么会有雨和雪水蒸气上升！0°C以上当小水点或小冰晶大到空气托不住的时候就会向下降落。如果低空气温高于0°C,降落下来的是水滴，这就是雨。．．．．．．．．．．．*********0°C以下寒冷的冬季，低空气温在0°C以下，小冰晶在降落过程中不会融化，这就是雪。说一说：露、霜、雾、云是什么原因形成的？为什么天上的雨总也下不完？chengde.99114.com/pifa-115/chengde.99114.com/pifa-116/cangzhou.99114.com/pifa-128/cangzhou.99114.com/pifa

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