The Various States of Matter

Water is a good example for showing what happens to matter when energy is added. Water has three distinct types of bodies or states; solid, liquid and gas.

Ice is nothing but water in its frozen state. We can see it and feel its coolness. By adding energy to it in the form of heat, the ice becomes water. This too we can observe. With the increase of energy, bringing the water to boiling, its molecules start moving so quickly that they reach a gaseous state. This gaseous existence can only be physically observed when this water vapor condenses in the form of clouds. If we point to the sky and exclaim, "water is there", those not involved in our experiment from the beginning will not believe it, since water vapor cannot be seen. Still, it exists in its most subtle form and most important form and we inhale it with every breath.