Question

using a microscope to count bacteria on a slide every day at work, greta poured a large cup of tea that she drank throughout the morning. she wondered how much bacteria might be growing in her cup of tea as the morning went on. to find out, greta filled three identical cups with tea and placed them on her desk for three hours. after the first hour, she placed a drop of the tea from each cup on a separate microscope slide and counted the number of bacteria in the drop. greta repeated this with each cup of tea after the second hour, and again after the third hour. which of the following was a dependent variable in this experiment? the number of bacteria in a drop of tea the amount of time that the tea sat on the desk

Explanation:

In an experiment, the dependent variable is what is being measured or observed and depends on the independent variable. Here, the independent variable is the time the tea sat (the amount of time), and the dependent variable is what's affected by time— the number of bacteria. The number of bacteria depends on how long the tea sat, so it's the dependent variable. The amount of time is the independent variable as it's manipulated.

Answer:

the number of bacteria in a drop of tea