Lab 9 Report – Final Project Protocol
Lab 9 Report – Final Project Protocol 10 points Total. Turn this in online before the next lab class. FOR THIS REPORT ONLY your entire group may use the exact same wording—but each individual student must turn in a copy of the protocol as part of their own report. For this week’s lab report, write out a step-by-step protocol for your Final Project (based on the hypothesis you selected and its associated data collection table). This will be easiest if your group works together on the answers. Make sure you create a protocol that includes all the steps (and materials) you will need to complete your project–including repetitions (for greater numbers), statistical analyses, and controls. The Effect of Light Color on Chlorophyll Production in Plants Objective To investigate how different colors of light affect chlorophyll production in plants. Materials – Potted plant specimens (e.g., bean plants) – Blue, red, and green LED lights – Dark box or room for control group – Spectrophotometer – Mortar and pestle – Solvent (e.g., ethanol) – Filter paper – Measuring equipment (beakers, graduated cylinders) – Notebook and pen for recording data Procedure 1. Preparation: -Setup experimental groups blue light, red light, green light, and control (normal sun light). – Make sure each group contains an equal number of plant specimens. – Place the plants in an area where they will regularly receive the desired light color or darkness. 2. Experimental Setup: – Place LED lights at a suitable distance from plants to ensure even illumination. – Ensure that the light intensity is uniform across all groups. – Keep the control group alone in the regular room throughout the experiment. 3. Experiment Duration: – Expose plants to light conditions for 1-2 weeks each. – Ensure that other growth factors including as temperature, humidity, and watering are consistent across all groups. 4. Harvesting: – After exposure, select a representative leaf from each plant group. – Choose leaves that have received the greatest direct light exposure and are similar in age and position on the plant. 5. Chlorophyll Extraction: – Grind gathered leaves in a mortar and pestle with a tiny amount of solvent (e.g., acetone or ethanol). – Filter the solution to get a clear chlorophyll extract. 6. Spectrophotometric Analysis: – Use a spectrophotometer to measure the chlorophyll extract’s absorbance at wavelengths specific to chlorophyll a (about 664 nm) and chlorophyll b (around 647 nm). – Write down the absorbance readings for each sample. 7. Repetition: – Each repetition includes a new set of exposed leaves in bright color conditions. This means that we only use another set of leaves from the dark box and control group and repeat the abovementioned testing procedure. 8. Data Analysis: – Use suitable statistical tests (e.g., spectrophotometer) to compare chlorophyll absorbance between light exposure groups. – Determine whether there are any significant differences in chlorophyll production between the groups. 9. Conclusion: – Determine relationships between chlorophyll production and light exposure colors. – Using the findings, draw conclusions about the hypothesis and discuss any ramifications or future research prospects.
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