Take a piece of
thin aluminium sheet and keep it in the water in the bucket what do we observe? Now shape the same piece of aluminium into a small boat and place it on the surface of the water if float isn't it
When we drop the
aluminium sheet in the water it sinks because the density of aluminium is greater than the density of water.We can make it float by decressing its density by keeping the mass constant. Prepare a boat using the
aluminium sheet and place it on the water,we observe that it float on water because the bowl has large surface area and the air present in it make the bowl float. Its density decreases when it made as a bowl.