Water is a chemical substance with the formula H two O. It consists of two hydrogen atoms bonded to one oxygen atom. Water is a transparent, tasteless, and odorless liquid that is essential for all known forms of life.
Water has unique physical properties that make it essential for life. It freezes at zero degrees Celsius and boils at one hundred degrees Celsius. At room temperature, water exists as a transparent liquid. It can exist in three states: solid ice, liquid water, and gaseous steam. Water has a density of one gram per cubic centimeter and acts as an excellent solvent for many substances.
Water continuously moves through the environment in what we call the water cycle. The sun heats water in oceans, lakes, and rivers, causing evaporation. Water vapor rises and cools, forming clouds through condensation. When clouds become heavy, precipitation occurs as rain, snow, or hail. The water then collects back into bodies of water, completing the cycle. This process is essential for distributing fresh water across the planet and maintaining weather patterns.
Water is absolutely essential for all forms of life on Earth. The human body is approximately sixty percent water, which is crucial for transporting nutrients, regulating temperature, and removing waste. Plants need water for photosynthesis and growth, while animals depend on water for survival and cellular processes. Water enables chemical reactions necessary for life and serves as a medium for biological processes. Without water, life as we know it simply cannot exist.
To summarize what we have learned about water: Water is a chemical compound with the formula H two O, consisting of hydrogen and oxygen atoms. It exists in three physical states and continuously moves through the environment via the water cycle. Water is absolutely essential for all known forms of life, making up a significant portion of living organisms and enabling vital biological processes.