What are the main concepts that make up the study of earth science?

The structure and history of Earth and what forces formed it. The investigation of earth in the context of the solar system and universe

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 .

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