The Complete Book of 100,000 Reasons Why
Favlit. ten thousand reasons why
为什么物质会变？
1、物质会变是因为化学反应，分子重新组合形成新物质。
2、物理变化如冰融化成水，物质形态改变但分子不变。
3、生物作用如植物生长，通过新陈代谢改变物质组成。
4、环境因素如光照和温度，可以引起物质分解或合成。
5、核反应如放射性，原子核发生变化产生新元素。
总之，物质的变化是能量转换和相互作用的结果，是自然界的普遍现象。
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