Describe one key difference between the physical properties of the radiation and convection zone? *astronomy*

Radiative heat transfer uses light, basically. It's how the sun heats us. Then there's conduction - put something hot in contact with something less hot, and heat flow from one to the other. Convection is just a case of conduction, where the one of the things is a fluid that can expand and then rise by gravity, so it carries heat away. Think hot-air balloon, or thunderstorm

They way i figured it, i got the answer of a. $120,200

Ithink the answer is bhope this !