Question

question 6 (10 points)
filter paper disks soaked in household bleach, rubbing alcohol, vinegar and water were all placed on a petri dish inoculated with bacteria and incubated. after two days the petri dishes were removed and studied for changes. what is the independent variable in this experiment?

○ a household cleaning products
○ b water
○ c bacterial growth
○ d two days of incubation

Explanation:

The independent variable is the factor that is manipulated in an experiment. In this experiment, different household cleaning products (Bleach, Rubbing Alcohol, Vinegar, Water) are used, so the independent variable is the type of household cleaning product. Option b is just one of the products, option c is the dependent variable (what's being measured), and option d is the duration of incubation (a controlled variable, not the independent variable here).

Answer:

a. Household cleaning products