On the top because that is where the ice is
Bottom.
As height increases temperture decreases. So the higher you are the colder it is.
Ice is 9% less dense than water so it floats. When water freezes it floats to the top so the water (liquid) is always at the bottom.
circulates from the bottom to the top
There is no vertical air movement
This is found out by knowing the densities of the liquids in question. The liquid with the smaller density will always be on top, while the liquid with the higher density will be at the bottom.
At the bottom, there is the additional weight of the gas or liquid above the surface level.
It can. One area may be warmer than the other which would reduce shelf life. Usually, the bottom of the fridge is colder than the top, but it is a good idea to check that with a calibrated thermometer.
Because hot water weighs less (steam) than ice.
To keep it from separating into solids on the bottom with a layer of liquid on top.
The bottom of the ocean is colder. The sun heats the top of the ocean first and then heats lower. In a nutshell, the top of the ocean is warmer and the deeper you go the colder.
because liquid exerts more pressure more at the bottom tan at the top