Water is a life-sustaining substance that covers a significant portion of our planet and is essential for all forms of life. It is a remarkable compound composed of two hydrogen atoms bonded to one oxygen atom, forming the familiar chemical formula H2O. With its unique properties and crucial role in numerous natural processes, water is a fundamental resource that shapes the Earth’s ecosystems and supports the well-being of all living organisms.
Water exists in three states—solid, liquid, and gas—and transitions between them through the water cycle. This continuous movement involves processes such as evaporation, condensation, precipitation, and runoff, ensuring the redistribution and replenishment of water across the planet. From oceans and lakes to rivers and underground aquifers, water exists in various forms and plays an integral part in Earth’s geology, climate, and biodiversity.