Sugar water turning to sugar crystals on the stove is a chemical change.

true
false

I think the correct answer is false. Sugar water turning to sugar crystals on the stove is not a chemical change but instead it is only a physical change since there are no reactions involved. Sugar is still the same sugar. It is the physical state that was changed.

Aconductor easily transfer heat

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 .