noun, noun which may take the genitive case particle 'no'
convection
Refers to the movement of fluid (liquid or gas) caused by temperature differences, commonly used in physics, meteorology, and engineering.
暖かい空気は対流によって上昇する。
Warm air rises by convection.
対流圏は大気の最下層である。
The troposphere is the lowest layer of the atmosphere.