Phases of water & Water molecules
Solid: The particles are tightly packed and it has the least amount of kenetic energy. Definite volume and shape. Liquid: The particles are more loosely packed and they move around. It has a definite volume and it takes the shape of it's container Gas: Particles are loosely packed and they move rabidly. It does not have a definite shape or volume.

Ice is the solid state of H20. The solid takes a shape and it has a definite volume. Water is the liquid form of H20. It takes the shape of it's container(shown in the cup above) and it had a definite volume. Water vapor is the gas state of H20. It does not have a definite shape of volume as shown in the photo above.