Put it in somewhere cold, or block the Sun's rays from hitting it with a tarp or something, or insulate it with cloth to keep the cold in and the hot out.
Anything that dissolves in water. Usually salt is used.<><><>Salt makes ice melt faster- question was keep from melting. Materials that insulate ice from air or water around it....
Water, in aqueous (liquid) state, become solid (ice) at 0 degrees celsius. That is simply it's chemical property. When you place ice in a system with a temperature higher than the ice, everything...