Question

the passage below describes an experiment. finn’s young son drew all over the living room wall with crayons! finn wanted to find a way to remove the crayon markings. based on what he read online, he decided to see if scrubbing a wall with baking soda could help remove crayon. finn dipped a sponge in water and used it to scrub the crayon on a small section of the wall. he dipped a second sponge in water, sprinkled it with one teaspoon of baking soda, and used it to scrub the crayon on another section of the wall. he then dipped a third sponge in water, sprinkled it with two teaspoons of baking soda, and used it to scrub a third section of the wall. he observed how much crayon was removed from each section. finn repeated this test two more times on other sections of the wall. in this experiment, the sections of wall scrubbed with water and one teaspoon of baking soda were part of ________. an experimental group a control group

Explanation:

In an experiment, the experimental group is exposed to the independent variable (here, baking soda). The wall sections with 1 tsp baking soda (and water) are tested with the variable, so they're the experimental group. The control group would lack the variable (like water - only scrubbing).

Answer:

an experimental group