| Explore | We've learned from the reddish experiment and photosynthesis experiment that for photosynthesis to take place it requires light, carbon dioxide, and water. |
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| Research Question | If we use different wattages of light, will it increase the rate of photosynthesis? |
| Predictions | If we use the 100 watt bulb the rate of photosynthesis will be higher than 60-watt bulb because the energy given is higher |
| Experimental Design | The steps that we followed doing the different wattages photosynthesis experiment are these: 1. Take a cup, put 100ml of 0.2% backing soda water using a graduated cylinder. 2. Put 2 drops of soap in the cup. 3. Cut 12 disks of spinach leaf with a hole puncher. 4. Remove the air from the leaf disks using a syringe. 5. Put the disks in the cup and put it under 100W bulb light for 10 minutes counting every minute how many disks raise to the surface. 6. Repeat this with the 75W bulb and 60W bulb doing 2 trials for each and then average them. |
| Conclusion | Claim: The trial in which we used a 100W bulb had the highest rate of photosynthesis. Evidence:The trial with the 100W bulb had an average of 12 leaf disks at 10 minutes whereas the 75W had an average of 10.5 leaf disks at 10 minutes and the 60W bulb had an average of 10 leaf disks at 10 minutes. Reason: The trial with the 100W bulb had a higher level of energy given to leaf disks Which means a higher rate of photosynthesis. |
| Investigation Theme | POS |
| Grade Level | High School Students (Grades 9,10,11,12) |
| Teacher Name | Christine Jones |
| School Name | Powell High School |
| Session | Fall 2021 |