What is the skeleton equation of the following? Potassium oxide
Magnesium oxide
Sulfur trioxide
Sodium chloride

North atlantic current or north atlantic drift is the answer

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 .