Question

energy conversions obey the law of conservation of \boxed{}, which states that energy cannot be created or \boxed{}.

Explanation:

The law related to energy conversions is the law of conservation of energy. This law states that energy cannot be created or destroyed, only transformed from one form to another. So the first blank should be "energy" and the second blank should be "destroyed".

Answer:

First blank: energy; Second blank: destroyed