Answer: Solubility
Solubility is the ability to be dissolved. Saturation is when the concentration is too high(more than solubility) that when you add another material it won't dissolve. Solute is the material that dissolved. Solvent is the material that used for dissolving
The metric system is based on units of tens.
It moves back because if the wagon moves forw
ard the energy of the ball moves backward