Salt is an industrial material, and it is produced by the tonne. It is often vended by weight, and you can purchase a ton, or a pound or two. Certainly a kilogram or two can be had as well. But it is often measured by volume in recipes, and everything from a dash to a pinch to a fraction of a teaspoon or tablespoon or even more (like for pickling) is called for in a given preparation. Measurement of salt is dependent on the person who wishes to measure it and will be done with consideration to the application. Salt for brine at a canning company will be purchased by the tonne, and will be dispensed into the vats by the pound or kilogram. And while this measurement is happening, the spouce of one of the workers at that canning company will be measuring out a teaspoon to include it in the preparation of a batch of cornbread. All of this will be done with the appropriate instruments for the amount of measurement involved.
salinity
Salinity is the measure of sodium or salt in liquid.
Density
No; but if you're using a large amount you should measure by weight, not volume.
add 10mm each day
Salinity is a measure of thew salt content in a solution and is expressed in parts per thousand (ppt)
If you are trying to measure concentration of salt in water you would be measuring molarity which is moles / liter. Moles are equal to grams of salt / the MW of salt (and if you mean NaCl then the MW is 58.44 g/mol). Density is a ratio of mass to volume (mass / volume or kg/m^3)
Salinity
Ah, measuring a pinch of salt is like adding a touch of magic to your cooking! In the metric system, you can use a unit called a "gram" to measure a pinch of salt. Just gently sprinkle a small amount into your dish, like adding a sprinkle of happiness to brighten your day.
If you are trying to measure how fast an ice cube melts with or without salt added, your Independent variable would be amount of salt added, and your Dependent variable would be the amount of time it takes to melt.
We would use MassSingle!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
This depends on the amount of water and the amount of salt.