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.
For example, agar melts at 85 Â°C (185 Â°F) and solidifies from 31 Â°C to 40 Â°C (89.6 Â°F to 104 Â°F); such direction dependence is known as hysteresis. The melting point of ice at 1 atmosphere of pressure is very close to 0 Â°C (32 Â°F, 273.15 K); this is also known as the ice point.he higher the quantity of other components, the lower the melting point and the broader will be the melting point range, often referred to as the pasty range. The temperature at which melting begins for a mixture is known as the solidus while the temperature where melting is complete is called the liquidus.