elevation noun [C/U]. âº âheight above the âsurface of the âearth, or an âarea that is âhigher than the âsurrounding âland: [C] At âhigher elevations, the âair is âcolder. (Definition of elevation from the Cambridge Academic Content Dictionary Â© Cambridge University Press).
A dissolved gas is, simply enough, gas that has been dissolved into another material. This creates a solution, a mixture, where the gas is the solute, the minor component, and the other material, generally a liquid, is the solvent, the main component.
You might hear the term  vapor .. Vapor and gas mean the same thing. The word vapor is used to describe gases that are usually liquids at room temperature. Good examples of these types of liquids include water (H 2 O) and mercury (Hg). They get the vapor title when they are in a gaseous phase. You will probably hear the term âwater vaporâ which means water in a gas state. Compounds such as carbon dioxide (CO 2) are usually gases at room temperature. Scientists will rarely talk about carbon dioxide vapor. Gases hold huge amounts of energy and their molecules are spread out as much as possible.