What is the independent variable? 9. What is the dependent variable? (What will we measure?) Play the video to get the results and answer these questions: 10. What is the DO level of the bottle that was in the light? mg/L 11. What is the DO level of the bottle that was in the dark? mg/L Fill in this chart: Initial Dissolved Oxygen (ppm) (both bottles) Final Dissolved Oxygen in Dark Bottle (no photosynthesis, only respiration) Final Dissolved Oxygen in Light Bottle (both respiration and photosynthesis)