| Explore | |
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| Research Question | How does temp effect the rate of photosynthesis in spinach leaves? |
| Predictions | We would predict that the room temperature environment will produce the most photosynthesis. We feel that he enzymes will not work as well when the environment is too hot or too cold. |
| Experimental Design | Materials needed: 2 hot containers (temp determined by coffee maker), 2 cold containers (temp determined by ice cubes), and 2 control containers (room temp water) - (each container 100mls) 10 spinach discs/container 50 ml of distilled water 2 drops of soap sol'n per container 3 scoops of baking soda per container 3 lights standard distance from containers hole punch syringe Procedure: Step 1: prep spinach discs and containers with baking soda solution 2: infiltrate disks with solution 3: add disks to containers 4: place 2 containers in acclimated temp containers (temp prepped 40, 65, & 100 degrees) 5: record number of disc floating every min for 15 min. 6: establish number of disc floating per time and compare with average temps. |
| Conclusion | CER Claim-within our parameters, photosynthetic rate increases as temperature increases Evidence - In cold water (avg 5.5 C) no disks rose after 15 minutes In the control water (avg 21 C) 70% of the disks rose after 15 minutes In the hot water (avg 35 C) 100% of the disks rose after 1 min Reasoning - Our results demonstrate photosynthetic rate increases with temperature, as a result of changes in enzymatic activity (Worthington 1972) Our results did not support our hypothesis how ever they do demonstrate increased rate of photosynthesis with increased temperature |
