Question

procedure 1. wet the surface of the table using the spray bottle. 2. dip the straw in the solution with water and soap. blow a bubble on the table by slowly adding air. when it pops, measure the diameter of the bubble and record it in your data table. practice making 3. each member of your group should blow four bubbles and record on the data table. 4. repeat the same procedure with the solution of water, soap, and glycerin. record your values in the data table. 5. clean up well! data analysis after completing the experiment, you have to do something with the data. start by calculating the average (or mean) diameter for each type of solution. when you are finished, make a bar graph of your results that shows the average bubble diameter for soap and soap plus glycerin. the contest is to see which group can produce the largest mean diameter for their soap bubbles. 1. what is the independent variable in this experiment? (1) 2. what is the dependent variable in this experiment? (1)

Explanation:

In an experiment, the independent variable is what is changed or manipulated, and the dependent variable is what is measured as a result of the change in the independent variable. Here, the type of solution (water - soap, water - soap - glycerin) is being changed to see its effect on the bubble diameter. So, the bubble diameter is what is being measured and is thus the dependent variable.

Answer:

The dependent variable is the bubble diameter.