Water (H2O)

Water (H₂O) is a vital substance composed of two hydrogen atoms bonded to one oxygen atom. It exists naturally as a liquid and is essential for all known forms of life. Water’s unique properties include its ability to dissolve many substances, regulate temperature, and facilitate biological processes. It covers about 71% of Earth's surface, mostly as oceans, and is also found in rivers, lakes, ice, and in our bodies. Water plays a crucial role in environmental systems, agriculture, industry, and daily life, making it indispensable for sustaining life and supporting ecosystems.