These sorts of spells seem like some of the trickiest for me to wrap my head around (pun not inteded, assuming it would constitue one).

If I turn an object, let's say a car, into water it would presumably splash to the ground and go into the soil unless some further magic is used. What happens when the duration runs out and all the water is spread out? Does it turn into myriad fragments of metals, plastic, rubber and so on?

If I turn the car into paper or wood or something instead and then burn it down, would the resulting ash eventually switch back at the end of the...