The four chemicals that are essential for life on Earth are water, carbon, nitrogen and phosphorus. Water is essential for life because it is an excellent solvent. Many different type of material can dissolve in water. Water transport nutrients and waste in and from the human body. Water is also found everywhere on Earth. It can exist as a liquid, solid or gas. Many organisms use water in order to flush toxins anything into and out of a cell. Without water there would be no vegetation on land and no oxygen. Basically without water life would be impossible. Water is vital for all living things on Earth and is the vital force behind the Earth’s climate. The Water Cycle, which is the "first" step in the water cycle this happens when energy
