Question

What must happen for heat to be transferred by convection?

A. The liquid or gas must circulate to move the heat.
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B. The kinetic energy must be equal in two objects.
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C. The sun must send out electromagnetic waves.
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D. Two molecules must collide with each other.

Answer 1

D. Two molecules must collide with each other.

Step-by-step explanation:

I just got it wrong

Answer 2

(Q ) What must happen for heat to be transferred by convection?

A. The liquid or gas must circulate to move the heat.

Step-by-step explanation:

If the liquid or gas isn't heated then it wont be transferred it would just sit there . so it must be heated