![]() The underground water system is known as the water table, and contains all types of water that has become trapped below the surface. This water is usually accessed via aquifers, natural springs or wells. ![]() There is also an entire system of underground water that is also in liquid form. Everything from lakes and seas, to streams, lagoons, rivers, creeks and springs are forms of liquid water which connect to form the hydrosphere. This can be seen in a variety of places and forms across the earth. The first type of water most commonly thought of, is liquid water. However, this ‘other’ section does include water vapor, neon, carbon dioxide, and methane. percent, which is classified as ‘other’ as no one gas is dominant enough to be significant. The third most prominent gas is argon, which is only 0.9 percent. The second most common gas in our atmosphere is Oxygen, which makes up 21%, and is the most important for both human and animal life. The atmosphere of Earth is actually primarily made from nitrogen, with a composition of 78 percent. The other layers extend outward from the surface, and are encompassed by the last layer, the Exosphere, before our atmosphere completely dissolves into Outer Space. ![]() This is also the area in which most organic life lives, on Earth. The Troposphere is the layer which holds the majority of the atmosphere, and is closest to the surface of the earth. The atmosphere can be separated and identified in several of its own layers, of which there are 5: the troposphere, stratosphere, mesosphere, thermosphere and exosphere.
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