What are the two things that the Periodic
Table uses to organize the elements?

The independent variable is the type of music.the dependent variable is the pulse rate.the intervening variable is the age of the subject.if the mother does not like rock, her pulse is likely to not increase.the same might be true for the sister.the friend may like rap and gets excited.to establish cause/effect relationship, all of the subjects must be consistent.hope i .

Density and pressure

While unproven, it uses facts to support part of a conclusion. it is still factual and has predictive power, however.