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.
Ice maker Bruce Tharaldson discusses how the temperature of the ice is changed when preparing for hockey as opposed to figure skating. Keeping the ice cold is one of the keys to maintaining fast ice. Bruce Tharaldson keeps the temperature of the ice at sixteen degrees Fahrenheit (-9 centigrade) for hockey and twenty-two degrees (-5.5 centigrade) for figure skating. Apparently, the figure skaters prefer softer ice for their landings and the six-degree temperature difference provides that. Click the forward button below to continue. The Ice:1-of-3