Question

Define the term Conventional symbols

Answer 1

They are  are widely recognized signs or sign systems that signify a concept or idea that all members of a group understand based on a common cultural understanding. 

Answer 2

Explanation:

Convection is the transfer of heat due to the bulk movement of molecules within fluids, including molten rock. Convection includes sub-mechanisms of advection, and diffusion. Convection cannot take place in most solids because neither bulk current flows nor significant diffusion of matter can take place.