List two physical properties and two chemical properties.

Physical properties:
Properties that do not change the chemical nature of matter
Examples-
1- Color
2- Smell

Chemical properties:
Properties that do change the chemical nature of matter
Examples-
1- Heat of combustion
2- Reactivity with water.

The teacher is mostly talking about the distillation of a mixture

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 .