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Explain that water is made up of tiny particles, called molecules, which are too small to see. These particles are always moving, even in very cold water. Since water molecules move, the molecules help mix the food coloring. However, the color mixed faster in the hot water than it did in the cold.
Th e Sun provides the energy to power the water cycle. Changes of State. When water changes state in the water cycle, the total number of. water particles remains the same. Th e changes of state include melting, sublimation, evaporation, freezing, condensation, and deposition. All. changes of state involve the transfer of energy. Figure 1 shows how the. water particles in each state behave as energy is added or removed.