Nature does this job through a process called the water cycle. Also known as hydrologic cycle, the water cycle is a phenomenon where water moves through the three phases (gas, liquid and solid) over the four spheres (atmosphere, lithosphere, hydrosphere and biosphere) and completes a full cycle. read more
There are a number of steps involved in the water cycle. Water passes through all three states of matter during this cycle. Natural forces such as the sun, air, land, trees, river, seas, and mountains play an important part in completing the water cycle. read more
Most will infiltrate (soak into) the ground and will collect as underground water. The water cycle is powered by the sun's energy and by gravity. The sun kickstarts the whole cycle by heating all the Earth's water and making it evaporate. Gravity makes the moisture fall back to Earth. read more