Water can be found in nature in various forms like rivers, lakes, seas, rain, snow, icebergs, water vapor and underground. Water has no color, taste or smell. It can exist as a solid, liquid or gas and the processes of changing between these states are melting, freezing, evaporation and condensation. The water cycle is the continuous process where water evaporates from bodies of water into the air, condenses to form clouds, precipitates as rain or snow and collects back into rivers and lakes. Day and night occur because as the Earth rotates, the side facing the sun experiences day while the side facing away experiences night.