The water cycle, also known as the hydrological cycle, is the continuous process by which water circulates through the Earth's atmosphere, land, and oceans. It involves processes such as evaporation, condensation, precipitation, and transpiration. Water evaporates from the Earth's surface, forms clouds through condensation, and then falls back to the Earth as precipitation in the form of rain or snow. This water then flows into rivers, lakes, and oceans, where it can evaporate again or be taken up by plants and eventually transpired back into the atmosphere. The water cycle plays a crucial role in regulating the Earth's climate and ensuring the availability of water for all living organisms.