Q 4. Liquids generally have lower density as compared to solids. But you must have observed that ice floats on water. Find out why.
Ice is solid but its density is lower than that of water due to its network structure and forms a cage-like structure with a lot of vacant space.
So that's why ice floats on water.
The mass per net volume of a substance is called density. As the volume of the substance, its density decreases. Though , ice is a solid,but it has a cage like structure in which some spaces are present between the particles of water (this places are left when water solidifies). These spaces are trapped by the air particles. This fishes are larger as compared to the spaces present between the particles of water. Thus, the volume of ice is greater than the water. Hence, the density of ice is less than that of water.A substance with low density than water can float on water. Thus, ice floats on water