What is the difference between elements with 13 protons and 13 neutrons and elements with 14 protons and 13 neutrons ?

Decomposition is the cycle at which bacteria breaks down any organic material into the soil

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 .