### substance | mixture | suspension | vapor:

Water vapor
* All water vapor formed by the combustion reaction is condensed to the liquid state.
* Most water vapor becomes clouds.
* Most water vapor comes from Earth's oceans, lakes, and rivers
  - evaporation
  - enters our atmosphere by evaporation from surface water and wet soil
  - falls as rain
  - forms high clouds
* Most water vapor has absorption
  - effects
  - strong effects
  - is produced by evaporation
  - loses heat
  - occurs in the troposphere
  - reduces transpiration
* Most water vapor turns into liquid water
  - liquids
  - precipitation
* Some water vapor absorbs long wave radiation
  - microwave radiation
  - becomes liquids
  - comes from oceans
  - creates dew
  - falls to earth
* Some water vapor has energy levels
  - leads to heat
  - passes through stomata
* Some water vapor releases energy
  - heat energy
* Some water vapor turns into crystal
  - water ice crystal.
  * ' is water that is in the form of a vapor, or gas. It part of the water cycle. Steam is water vapor, but clouds are liquid water. Water vapor affects weather conditions. Water vapor is found in most of the air. In the cold, breathing out causes the water vapor breathed in to freeze.
  * is transparent. The small droplets that look white like mist are actually liquid
* absorbs infrared radiation coming from planets, stars and galaxies
* acts as a greenhouse gas, causing the Earth to heat up
  - like a greenhouse gas, absorbing outgoing longwave energy
* added to the atmosphere by human activities has little effect on the greenhouse effect.
  - visible and thus clouds when the air is cooled as it rises
* bends the light.
* big cause of the greenhouse effect
  - hazard because it can condense inside the house into water, and mold can grow
* by-product of respiration in plants and animals.
* can be just as harmful
  - up to several percent
* can change to become ice and water
  - or water
  - condense around the last two and form clouds
  - dissolve in air and can be transported around by convection
  - enter from the outdoors via the damp ground or leaky gutters
  - escape if there's too much in the wall, but then it can come back in
* can form clouds which reflect incoming sunlight and thus have a cooling effect
  - ice crystals, as in the form of frost
  - penetrate all but a few materials
* causes few problems
* comes from evaporation from the earth's water and soils
  - lakes, rivers, oceans and wetlands
* coming into contact with the ice is cold, and condenses, forming clouds.
* condenses into raindrops
  - spherical raindrops
  - only on the surface
* contributes to clouds.
* cools as it expands and encounters cooler temperatures in the atmosphere
  - rises higher into the atmosphere and turns back into liquid water
* dissociates into hydrogen and oxygen at the hot filament.
* does contribute to buoyancy, but less than heat does.
* enters atmospheres.
* enters the air through the evaporation of water
  - when it s exposed to water
* evaporates from surfaces.
* flows away from the liquid nitrogen.
* form of water in the air.
* forms clouds
* freezes onto the ice crystals as layers.
* gas in the air.
* gas that occupies in the same space as other gases
  - the same space with other gases that together constitute air
* gaseous form of liquid water.
* gets into the air through evaporation.
* gets together in a big cloud
* greenhouse gas that can lead to global warming.
* has a highly greater effect, so that overall, the changes increase global warming
  - much larger effect, so that overall the changes increase global warming
  - tendency to precipitate out of the atmosphere
* is absorbed by the desiccant coating the honeycomb structure of the wheel.
* is also a byproduct of the reaction if the surface contains carbon-hydrogen bonds
  - green house gas so
  - greenhouse gas that plays a critical role in the global climate system
  - potent greenhouse gas
  - present
  - the most important greenhouse gas in the atmosphere
* is an important part of the natural greenhouse effect
  - invisible form of water in the air
  - both lighter and less dense than dry air
  - by far the dominant greenhouse gas
  - called vapor,even though it is odorless and highly transparent
  - carried by the wind all over the globe
  - considered one of the most imp-ortant variables in meteorology
  - evolved from the heat of reaction of the acid and ammonia
* is extremely important in the atmosphere
  - to the weather and climate
  - formed over tropical regions and is transferred away from the tropics in storms
  - greenhouse gases
  - important to the transport and release of latent heat
  - itself a greenhouse gas
  - light, therefore, it rises into the atmosphere
* is lighter or less dense than dry air
  - than the nitrogen and oxygen in the air, so rises in the atmosphere
  - lower but ozone levels are much higher than in the troposhere
  - made of water
  - no more than water molecules bouncing around in the air
  - odorless, colorless, tasteless
* is one of the most important variables in the atmosphere affecting weather and climate
  - products of gas combustion
  - state of the water cycle within the hydrosphere
  - removed from the atmosphere during precipitation and returns by evapotranspiration
  - responsible for about two-thirds of the natural greenhouse effect
  - restricted by the varnish from passing through the relatively porous paint
  - simply water existing as a gas
  - so light that it weighs less than air
  - the gas form of water
* is the gaseous form of water in the atmosphere
  - state of water and is invisible
  - invisible source of clouds and rain and is also a form of heat transfer
  - largest contributor to the greenhouse effect
  - main by product of the process
* is the most abundant greenhouse gas and therefore significantly affects climate
  - gas, followed by carbon dioxide and other trace gases
* is the most important greenhouse gas, and carbon dioxide comes second
  - powerful greenhouse gas
* is the only byproduct of the process, making it pollution-free
  - emission
  - tail-pipe emission
  - real wild card in global warming
  - source of all clouds and precipitation
  - totally invisible
  - transported by wind and air currents through the atmosphere
* is water in a gas form that is held in the air until it changes back to water
  - gaseous state
* key component of the Earth's hydrologic cycle.
* leaves the leaf pulling on the water in the xylem that has been absorbed by the roots.
* makes up only a few percent of air
  - the majority percent of smoke
* moves freely from the leaf through the open stomata.
* occurs in varying amounts depending upon temperature and pressure
  - naturally and is harmless, and is needed for precipitation
* passes through easily.
* plays a great role in instability
  - key role in lightning production in the atmosphere
* potent greenhouse gas along with other gases such as carbon dioxide and methane.
* principle absorber of shortwave and longwave radiant energy.
* provides the positive feedback that amplifies the warming.
* reaches the atmosphere through the evaporation of ocean and lake water.
* reflects radar to a lesser extent than do water's other two phases.
* represents an environmentally significant component of the atmosphere.
* responds only to temperature and humidity.
* rises and forms clouds
  - from a microscopic hole in the plant leaf
  - in atmosphere
* rises, cools and condenses to form clouds
  - cools, and falls as precipitation
* shows the percentage of water vapor existing through the atmosphere.
* significant component of the Earth's atmosphere and a greenhouse gas.
* source of clouds and precipitation.
* suspends in air.
* travels up into the atmosphere where it cools into clouds.
* varies in air with changing temperature
  - concentration in the atmosphere both spatially and temporally
* very effective greenhouse gas.
* weighs less than air , which is part of the reason clouds float high in the sky.