Question

which two statements describe an experiment?
a. ask homeowners in a neighborhood what kind of outdoor paint they used on their homes.
b. count the number of homes in different neighborhoods that look like they were recently painted.
c. use two different outdoor paints on the same house and compare the effects of sunlight over time.
d. apply paint to a house at different times of the day and record the time that the paint takes to dry.
e. survey local stores to find out how much of each type of outdoor paint were sold during a 30 - day period.

Explanation:

An experiment involves manipulating variables and observing outcomes. Option C manipulates the type of outdoor paint (variable) and observes the effect of sunlight over time. Option D manipulates the time of day paint is applied (variable) and observes drying time. Options A, B, E are surveys/observations without manipulation.

Answer:

C. Use two different outdoor paints on the same house and compare the effects of sunlight over time, D. Apply paint to a house at different times of the day and record the time that the paint takes to dry