Liquids generally have lower density as compared to solids but you must have observed that ice floatis on water. Find out/why.

Explanation

Ice is formed by the freezing of water. When water freezes to form ice, then a number of empty spaces are created in solid ice (which were not present in liquid water) giving it a cage-like structure. Due to the presence of some empty spaces, the volume of ice becomes more than an equal mass of water. Because of its greater volume, the density (mass per unit volume) of ice decreases. And due to its lower density than water, ice floats on water (even though it is a solid).