Question

the passage below describes an experiment.
grace set 15 drinking glasses on her countertop. she poured the same amount of water into each glass, putting 40°f water into five glasses, 65°f water into five glasses, and 120°f water into five glasses. then grace added one teaspoon of sugar to each glass and measured the time it took the sugar to dissolve completely in the water.
identify the question that the experiment can best answer.
when sugar is added to water, does the waters temperature affect the amount of time it takes the sugar to dissolve?
does water temperature affect the total amount of sugar that can be dissolved in water?
does one teaspoon of sugar take less time to dissolve in water than five teaspoons of sugar?

Explanation:

Grace's experiment has different water temperatures (the independent variable) and measures the time for sugar to dissolve (the dependent variable). The first question is about the relationship between water temperature and dissolution time, which matches the experiment. The second question is about total amount of sugar dissolved (not measured here). The third question is about amount of sugar (not varied in the experiment).

Answer:

When sugar is added to water, does the water’s temperature affect the amount of time it takes the sugar to dissolve?