This is due to the fact that there is little food (flying insects) for them to eat. If they stayed awake in a warm home, without hibernating, then they would starve. We can begin the bat exclusion process during the winter months.
Mean free path of molecules in a gas. The molecules in a gas are assumed to be in continuous random motion making collisions with each other and with the walls of the container. The mean distance that the molecules travel between one collision and the next is called the mean free path of the molecules.
It's called osmosis.   A selectively permeable membrane will only allow certain molecules  to pass trough. To illustrate: If you have a high concentration of  sugar mole â¦ cules on one side of the membrane, no sugar on the other  side, and the sugar molecules are too big to pass trough the  membrane. If this is the case, then water molecules will diffuse  over to the side of the membrane with a high sugar concentration.  This happens because the molecules try to distribute themselves  evenly in the solution. The water molecules move because the sugar  molecules can't. 3 people found this useful.