| Explore | Plants go through photosynthesis, they use water, sun, and nutrients to grow. In class, we have discovered that plants use O2 and light to do photosynthesis. Plants produce CO2 when going through photosynthesis. Does light change the pigment of the plant? Can plants grow without water? |
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| Research Question | What effects do light and dark have on plants? It is the research question. |
| Predictions | The cup with O2 in it was going to make the leaf disks rise. The one with just water would not make anything happen. The O2 will create air bubbles under the leaf disks to help them float. |
| Experimental Design | Cut out the leaf disks in the same way that happened did in the previous investigation. Blow O2 into 2 cups half full of water. Leave two half-full cups with just water. Create a vacuum in the syringe like in the past experiment. Once sunken, empty the tube into the cup with that water in it. Put one of each cup with the leaf dicks in it, one in the dark, one in the light. Wait 20 minutes, but only record at the end of the 20 minutes. We are testing if the difference between light and dark has an effect on the plant's rising. We had the same number of leaf disks and water in each cup. Record the date in a chart at the end. |
| Conclusion | You Require both Carbon Dioxide and Sunlight to go through the processes of photosynthesis and cellular respiration. |
| Investigation Theme | POS |
| Grade Level | High School Students (Grades 9,10,11,12) |
| Teacher Name | Bill Welch |
| School Name | Campus High School |
| Session | Fall 2023 |