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Water vapor, water vapour or aqueous vapor is the gaseous phase of water. It is one state of water within the hydrosphere. Water vapor can be produced from the evaporation or boiling of liquid water or from the sublimation of ice. Water vapor is transparent, like most constituents of the atmosphere. [1]
Humidity is the concentration of water vapor present in the air. Water vapor, the gaseous state of water, is generally invisible to the human eye. [2] Humidity indicates the likelihood for precipitation, dew, or fog to be present. Humidity depends on the temperature and pressure of the system of interest.
16 Μαρ 2019 · Water vapor exists as an invisible gas in the air. The amount of water vapor in air varies according to the temperature and density of air. The amount of water vapor ranges from a trace amount up to 4% of the mass of air. Hot air can hold more water vapor than cold air, so the amount of water vapor is highest in hot, tropical areas and lowest ...
Water Vapor. Water is constantly cycling through the atmosphere. Water evaporates from the Earth's surface and rises on warm updrafts into the atmosphere. It condenses into clouds, is blown by the wind, and then falls back to the Earth as rain or snow.
Water Vapor: Water is cycled through all of Earth’s systems in each of its three phases: solid, liquid, or gas. Water vapor in the atmosphere is a greenhouse gas due to its heat-trapping ability. Carbon Dioxide: Carbon dioxide naturally composes about 0.03% of the atmosphere, but the amount is increasing due to the burning of fossil fuels.
In general, humidity is the amount of water vapor in the air. You’ve likely heard of relative humidity and dew point temperature, but what do these quantities mean physically? Saturation. Imagine a closed jar filled halfway with water. At the initial time, more water molecules evaporate from the water surface than the number that return.
When the air is humid, it has more water vapor, or water in the form of a gas, than dry air has. Looking at all the gases in the atmosphere, water vapor occurs in only trace amounts, making up an average of 1% to about 4% of the total volume. Still, water vapor plays an outsized role in our weather and climate.
