In cold climates, the amount of snow on the ground may decrease, even if the temperature stays below 0°c. which process explains this event?

The correct answer is "atomic weight".

Your awser would be a acetone

Ithink ahopefully im correct 

Remember that rust prevented by placing a sacrificial electrode in electrical contact with the iron. the sacrificial electrode must be composed of a metal that  oxidizes  more easily than iron (that is, it must be below iron in table 18.1).