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The 42 pages that link to Water vapor, each with the reason it gives.

• Volcanic gasBroader topic: It is usually the most abundant component of volcanic emissions.

• Relative humidityBroader topic: It is the atmospheric constituent whose abundance relative humidity compares with saturation.

• CondensationNarrower topic: It is the gaseous starting state that becomes liquid during condensation.

• Greenhouse gasBroader topic: It is the most abundant greenhouse gas and responds strongly to temperature changes.

• John DaltonRelated: Dalton investigated how water vapor behaves in air and how atmospheric moisture affects pressure.

• Cloud condensation nucleiRelated: It supplies the water that condenses onto cloud condensation nuclei.

• Atmospheric windowRelated: Its strong, numerous absorption bands interrupt infrared transmission.

• Exoplanet atmosphereRelated: Water vapor has been detected in some exoplanet atmospheres and is a major spectral target.

• SteamingNarrower topic: Boiling water supplies the vapor that carries heat to food.

• Dew pointBroader topic: Dew point reflects the amount of water vapor in an air parcel.

• John TyndallRelated: Tyndall identified it as a strong absorber of heat radiation.

• DeliquescenceRelated: It supplies the molecules that a deliquescent solid absorbs.

• HumidityBroader topic: Humidity measures this gas when it is mixed with air.

• ThunderstormRelated: Moist air supplies condensate and latent heat for cloud and storm development.

• Air densityRelated: Water vapor replaces heavier nitrogen and oxygen molecules, lowering moist-air density at equal pressure and temperature.

• Cumulus cloudRelated: Rising moist air supplies the vapor that condenses into cumulus cloud droplets.

• DesiccantRelated: This is the moisture desiccants capture from their surroundings.

• HygroscopyNarrower topic: It is the atmospheric form of water that hygroscopic substances take up.

• Lake-effect snowRelated: Evaporation from the lake supplies vapor that can condense and freeze.

• Cloud formationBroader topic: It is the atmospheric material that becomes cloud droplets or ice crystals.

• Pressure cookerRelated: Steam is the working fluid that carries heat and builds pressure inside the cooker.

• PsychrometricsBroader topic: Its partial pressure and mass determine the air's moisture state.

• Hydrogen fuelRelated: Water is the main product when hydrogen reacts completely with oxygen.

• SteamCompared with: The term distinguishes gaseous water from visible clouds of droplets often called steam.

• TroposphereRelated: Most atmospheric water vapor is concentrated here, enabling clouds and precipitation.

• Atmospheric absorptionBroader topic: Its numerous absorption bands make it the atmosphere’s most abundant variable greenhouse gas.

• Polar stratospheric cloudRelated: Stratospheric water vapor supplies the ice and liquid components of cloud particles.

• Cumulonimbus cloudRelated: Rising air supplies the moisture that condenses into cloud droplets.

• HumidifierNarrower topic: Humidifiers raise humidity by adding water vapor directly or by dispersing droplets that later evaporate.

• Liquid waterCompared with: Unlike liquid water, vapor has no fixed volume and its molecules are widely separated.

• Volcanic outgassingRelated: Water is commonly abundant among volcanic emissions and can condense after release.

• Water–gas shift reactionRelated: Steam supplies the oxygen and hydrogen atoms needed to convert carbon monoxide.

• Winter stormRelated: Moisture supplies the precipitation that a winter storm can deliver.

• FumaroleRelated: It commonly dominates fumarole plumes when groundwater is heated beneath the surface.

• Eunice Newton FooteBroader topic: Foote tested it alongside carbon dioxide and found that it heated in sunlight.

• FrostRelated: It supplies the molecules that become frost crystals.

• MistCompared with: Mist consists of liquid droplets, despite the common description of it as visible vapor.

• PopcornRelated: Steam generated inside the kernel builds the pressure needed for popping.

• Superheated steamNarrower topic: Superheated steam is a particular thermodynamic state of water vapor.

• Funnel cloudRelated: Cooling air causes water vapor to condense, outlining part of the funnel’s circulation.

• Noctilucent cloudRelated: Even trace amounts of water vapor supply the ice that makes these clouds visible.

• Steam devilRelated: Water vapor from the warm surface supplies moisture that can condense in cooler air.