According to the ph scale, which substance is the most basic?
a. soap
b. bleach
c. sea water
d. oven cleaner

It conforms what ever surface its in.

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 .

Change in speed or direction : )