The ball falls to the bottom before the flat foil for the same reason as it does in air. The aluminum foil is denser than air and water. So flat or ball shaped aluminum will sink in water, unless there is air trapped in the ball.Click to see full answer. Considering this, does aluminum foil sink in water?Density is not the only thing which decides if an object will float or sink, we also need to think about the buoyancy of the object. A piece of aluminum foil will float if it is laid flat onto of a bath of water but it will sink if you roll the foil into a tight ball.Beside above, why does aluminum sink in water? Aluminium is heavier than water so that it will not float on water unless the part is hollowed to reduce it weight / volume ratio. The density in cold water is lower, which means that the density difference between the object and the water would decrease. Thereof, why does an aluminum foil boat float? Your foil ball, crumpled into a tight clump, has more density because its pennies are crowded into a smaller space than those in the foil boat. The foil boat has less density because it is spread out and filled with air. Things float when they have less density than water, but sink when they have more.What happens when you put aluminum foil in water?When the foil comes in contact with moisture, it can accelerate the buildup of aluminum oxide.
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