You might mean variation. If you do mean that it means the act, process, or accident of varying in condition,character, or degree: Prices are subject to variation.2.an instance of this: There is a variation in the quality of fabricsin this shipment.
3.amount, rate, extent, or degree of change: a temperaturevariation of 40° in a particular climate.
4.a different form of something; variant.
5.Music .a.the transformation of a melody or theme with changesor elaborations in harmony, rhythm, and melody.
b.a varied form of a melody or theme, especially one of aseries of such forms developing the capacities of thesubject.
There is no "veriation key" in Minecraft. This is a feature of Skyrim and similar games.
Two variables related in such a way that their values always have a constant ratio directly vary.
perhaps two days. depending on an almost uncountable veriation of things such as weather conditions traffic, etc.
It will lower the SG. To what extent will depends upon the material and the temperature at time of measure. Altitude will and air presure will also change your SG reading. I am not sure how to compensate for either of those. However they do have charts and calculators which will compensate for temperature veriation. Hope this helps to point you in the correct direction to further your investigation of the topic.