To measure concentration, you compare the amount of the solute to the total amount of the solution.
Altimeter.
Diffusion is movement of molecules, from region of higher concentration, to the region of lower concentration, along concentration gradient.
Substances of a higher concentration (or with higher level of water molecules) are more soluble than lower concentration liquids.
gram
Barometer
it is called a measureing tape
Volume
Using Pythagoras' theorem it works out as 15 inches
This is called diffusion. Substances move randomly, from an area of high concentration to an area of low concentration. Osmosis is a specific type of diffusion that only involves the random movement of water.
osmosis moves through a membrane diffusion moves from higher concentration to lower concentration
It is used for measureing in on wood for great acuracey.
A measureing cup