Answer:1. The water cycle, also known as the hydrological cycle, describes the continuous movement of water on, above, and below the surface of the Earth. It involves several key processes: evaporation, condensation, precipitation, and collection. These processes are driven by solar energy and gravity, constantly circulating water throughout the Earth's systems. 2. A water cycle diagram shows the continuous movement of water on, above, and below the surface of the Earth, including evaporation, condensation, precipitation, and collection. A change of state diagram focuses on the physical transitions between solid, liquid, and gaseous forms of water, such as melting, freezing, evaporation, and condensation.3. Melting (solid to liquid) and freezing (liquid to solid) involve the change between these two states. Vaporization (liquid to gas) and condensation (gas to liquid) involve transitions between liquid and gaseous states. Sublimation (solid to gas) and deposition (gas to solid) represent direct transitions between solid and gaseous states, bypassing the liquid phase.