Relating to the movement of heat or fluid in which warmer material rises and cooler material sinks in a circular pattern.
From Latin 'convectus,' past participle of 'convehere' (to carry together), combined with the suffix '-ional.' The term evolved in the 19th century to describe physical processes in meteorology and thermodynamics.
Convection is why toast crumbs float up when you open a hot oven—hot air rises because it's less dense, creating the spectacular weather systems that meteorologists study!
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