Question

Selma made a diagram to compare convection and radiation.

Which label belongs in the area marked X?

Must involve temperature differences between substances or objects
Only occurs when molecules are in direct contact
Involves the movement of fluids based on density differences
Can occur where there is little or no matter

Answer 1

Can occur with little or no matter

Step-by-step explanation:

Answer 2

Can occur where there is little or no matter.

Step-by-step explanation:

Radiation is mode of heat transfer that does not necessarily have to involve a medium. Radiation occurs fastest in a vacuum where it has a speed of c- the speed of light where heat energy is transferred in photons. The factors that affect radiation include the distance between the producer of the heat and the receiver and the temperature of the producing body.