Add 2 teaspoons of baking soda and 2 teaspoons of citric acid to the foam cup. Add the half cup of water to the cup and stir. Is a chemical reaction taking place? How do you know?

Yes a chemical reaction is taking place

Explanation:

In this cooking procedure, a chemical reaction is taking place because the citric acid and the baking soda are both chemical species combining together.

At the end a new produce is formed. It is accompanied by a release of heatThe stirring helps to increase the rate of chemical reaction between the citric acid and baking soda

It changes food into energy that the organism can use.

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 .