any specific behavior | the transfer of heat through a fluid (liquid or gas) caused by molecular motion |
the trait of being active; moving or acting rapidly and energetically | (meteorology) the vertical movement of heat or other properties by massive motion within the atmosphere |
an organic process that takes place in the body | |
a process existing in or produced by nature (rather than by the intent of human beings) | |
the state of being active | |
(chemistry) the capacity of a substance to take part in a chemical reaction | |