How does water change state?

When water is a solid (ice) the particles are moving very slowly (lets call this the 1st state) . As heat is added the particles move faster, until it reaches 1*C. Because 0*C is freezing point, 1*C is melting point (2nd state). This would be the liquid water. When the water is heated, the particles move even faster, causing it to turn into a gas (water vapor and this is the 3rd state). When heat is taken away the reverse happens. When you go into more depth you actually find that the word "heat" is replaced with "engergy". This is more accurate.