Question

Do you think that solids can undergo convection? explain

Answer 1

Convection is a type of heat transfer that occurs in molecules. It refers to the collective movement of molecules within fluids and rheids (non-molten solids). Convection happens through the process of diffusion, advection, or the combination of both. Therefore solids cannot undergo this process because bulk current flows and significant diffusion cannot take place within the molecules of solids. Aside from this, solids have bigger molecules that are too compact and cannot move freely unlike fluids do.  

Convection can best be seen through an experiment when a glass of water is exposed to a heat source. The change in temperature in the glass causes warm fluid to move into cooler areas which causes it to boil and bubble.