Question

9 multiple choice 1 point marcie is trying a new cookie recipe. she wants to see if the amount of baking powder she uses will make the cookies rise more. she makes three batches of cookies and changes the amount of baking powder for each batch. what is the independent variable? how much the cookies rise how much baking powder she uses how tasty the cookies are the amount of milk she uses 10 multiple choice 1 point a student was comparing three plant species, x, y, and z, in a classroom. which statement is an example of an observation

Explanation:

In an experiment, the independent variable is the factor that is manipulated or changed by the experimenter. Here, Marcie is changing the amount of baking powder to see its effect on how much the cookies rise. So the independent variable is the amount of baking powder she uses. The other options: "how much the cookies rise" is the dependent variable (what's being measured), "how tasty the cookies are" is not related to the rise, and "the amount of milk she uses" is not the variable being changed to test the rise.

Answer:

B. how much baking powder she uses