Glossary term: 对流区
Description: 对流区是恒星内部以对流而非辐射为主要热量传输方式的区域。对流要求特定区域之内的温差较大。当辐射效率低下时，对流就开始了。
在对流区，恒星深处的热物质会上升到较冷的区域，在那里冷却，然后再下沉。在质量最大的主序星内部，恒星内核是对流区，而外层是辐射区。在与太阳类似的主序星内部，大气层以下的区域是对流区，而更深的区域则是辐射区。在质量最小的恒星中，从内核到大气层以下的所有区域都是对流区。
对流运动导致化学元素的大规模混合。当对流到达恒星表面时，会把新合成的元素和同位素输送到表面，从而在天文学家记录的光谱中留下印记。
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Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher The translation of this term and its definition is still awaiting approval
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