Water vapor can be treated as a gas. At a particular temperature air for example can only hold so much water vapor. The higher the temperature the more water vapor it can hold. When saturated the relative humidity would be 100 % RH, so relative humidity describes how close to saturation the air is. It is important to remember that in a process with a high relative humidity a small drop in temperature will cause the humidity to rise and the environment to saturate. Rapid temperature changes in a an environmental chamber for example could also cause condensation.
The name given to water in the form of a gas. Molecules of water as vapor are about 100 times farther apart than water as a solid (ice) or liquid.
Water molecules in the gaseous state.
The form water takes when it is a gas in the atmosphere.
Gaseous water (individual water molecules) in the atmosphere.
Water substance in vapor form. It is the major greenhouse gas. Its amount varies widely in space and time due to the great variety of sources of evaporation and sinks of condensation.
water in a vaporous form diffused in the atmosphere but below boiling temperature
water as a gas. Water can be a solid, liquid, or a gas. Steam is not water vapor. Steam is tiny drops of hot liquid water. Water vapor is invisible.
water substance in a gaseous state that comprises one of the most important of all the constituents of the atmosphere.
Water in the form of a gas, especially when below the boiling point and diffused.
Water in a vapor (gaseous) form; also refered to as atomospheric moisture. Water vapor is one of the most important parts of the atmosphere.
the gas produced when water evaporates.
water in gas form, created when liquid water evaporates.
Water (H2O) in gaseous form. Also called aqueous vapor . See vapor. The amount of water vapor present in a given gas sample may be expressed in a number of ways. See absolute humidity, mixing ratio, dewpoint, relative humidity, specific humidity, vapor pressure.
The invisible, gaseous state of water
small particles of water that are suspended in the atmosphere.
Moisture existing as a gas in air.
water in a gaseous (vapor) form
Water vapor is the primary gas responsible for the greenhouse effect. It is believed that increases in temperature caused by anthropogenic emissions of greenhouse gases will increase the amount of water vapor in the atmosphere, resulting in additional warming.
The gaseous state of water, which is also a greenhouse gas that is primarily released from the naturally occurring water cycle.
The gaseous form of water.
Moisture as a gas in air. Warm air can hold more water vapor than cold air. Water vapors in the air crates a pressure much like any other gas. Cold air has a relatively low vapor pressure.
Water in a vaporous form, especially when below boiling temperature and diffused (e.g., in the atmosphere).
Water in the form of an invisible vapor; the gas formed when water is evaporated.
Water in gaseous form. It is one of the most import constituents of the atmosphere. Due to its molecular content, air containing water vapor is lighter than dry air. This contributes to the reason why moist air has a tendency to rise.
Moisture existing as gas in the air.
Water vapor, also aqueous vapor, is the gas phase of water. On the Earth, water vapor is one state of the water cycle within the hydrosphere.Technically called the Hydrologic cycle, from U.S. Geologic Survey. http://ga.water.usgs.gov/edu/watercycle.html Water Cycle.