The tumbleweed dispersal strategies are unusual among plants; most species disperse their seeds by other mechanisms. Many tumbleweeds (though by no means all) are ruderal species, opportunistic agricultural weeds. Tumbleweeds have been recorded in the following plant families:
The most obvious is temperature. If the air temperature is above 32Â°F snow and ice will start to melt, at or below 32Â° and it will remain frozen. Think about a popsicleâ¦ inside the freezer it stays frozen, outside it starts to melt. The amount of sunshine plays a big factor.
Everything solid has a temperature which will make it melt. Ice starts to melt into water when it gets past 32 degrees Fahrenheit, 0 degrees Centigrade.  â¦ Candles melt at about 125 degrees F, 55 degrees C.     Above that temperature it will harden until it is solid.