Correlation Between Light Intensity And Distance

8. Draw conclusions – Assuming that your experiment produced results identical to those seen in Table 4, would you reject or accept the hypothesis that you produced in question 3? Explain how you determined this.

Report findings and conclusions from the research project (remember to include your action plan given to you at the beginning of the course) (P6)

The graph shows a linear relationship between light intensity between 0-150 µmoles photons m-2s-1 until the rate of oxygen production slowed between 150-350

To what extent do you consider that you have already started to develop the approaches of a critical practitioner? Analyse and evaluate your progress using examples from your work to illustrate your arguments.

3. Conduct pilot interviews using the protocol you have established to determine the effectiveness of your questions.

6. Although you are basically satisfied with the analysis thus far, you are concerned about the

5. Restate your predictions that were correct and give the data from your experiment that supports them. Restate your predictions that were not correct and correct them, giving the data from your experiment that supports the correction.

For each of the following four cases, explain why you would either approve or disapprove the proposed research experiments. Evaluate each proposal based on the four main principles of ethical research provided in this lesson. Every research experiment must follow all four principles to be considered ethical.

2. This experiment is not able to support Matthew's hypothesis. Suggest specific improvements that will allow the experiment to more effectively test the given hypothesis. Explain why these changes are improvements.

6. Restate your predictions that were correct and give the data from your experiment that supports them. Restate your predictions

Write a conclusion paragraph analyzing your results. In your conclusion, be sure to address the following questions:

2. Choose one of the research questions from above and consider it in more detail. Based upon the question, what would be a reasonable hypothesis?

Using the yellow tube, which included everything but starch, as the blank, each group zeroed their spectrophotometer. This was done so that any absorbance observed depends only on the amount of starch present, not on any other reagents (buffer, IKI). To zero the spectrophotometer, the wavelength was first set at 580nm, using knob 3 (45). Next, the groups made sure that the light next to “transmittance” was lit, and the chamber to be tightly closed. Having the chamber empty & closed tightly provides reference for the darkest condition possible. Using knob 1, the transmittance was turned until it read 0.0 (45). Before the groups used their blank test tube to zero the spectrophotometer, each needed to wipe the tube with kimwipes to ensure a clean reading. Turning knob 2, each group was then instructed to zero the absorbance, 0.000. Upon removing the blank, each trial was inserted into the chamber (46). The

The spectrophotometer was turned on 15 min prior to the experiment. For each different intensity levels, 2 cuvettes were prepared (one for the experimental variable and one for the control variable). Also, 2 cuvettes were prepared for each different wavelength. Two blanks were prepared for the entire experiment (one for intensity, one for wavelength). The experimental cuvette for intensity consisted of 2.5 ml of 2.5 ml DCPIP, 2.0 ml water, 2.0 ml PO4 buffer, and 0.2 ml chloroplasts, a total of 6.7 ml. The control cuvette for intensity was the same as the experimental cuvette for intensity. The experimental cuvette for wavelength consisted of 2.5 ml DCPIP, 1.7 ml water, 2.0 ml PO4 buffer, and 0.5 ml chloroplasts a total of 6.7 ml. The blank cuvette intensity contained 4.5 ml of water, 2.0 ml of PO4 buffer, and 0.2 ml chloroplasts for a 6.7 ml. The wavelength blank was composed of 4.2 ml water, 2.0 ml PO4 buffer, and 0.5 ml chloroplasts for a 6.7 ml. Before starting the experiment, we set the wavelength at 600 nm, placed the blank cuvette into the spectrophotometer, and set the absorbance at zero. The laboratory was kept dark during the experiment to prevent light pollution.

Q8: Write a report that outlines the information you have gathered and any recommendations you would make as a result.