| Explore | Plants take CO2 and expel oxygen. Plants perform something called photosynthesis where they get energy from sunlight. |
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| Research Question | Is celery discoloration caused by salt? |
| Predictions | No, celery discoloration is not caused by salt. It is caused by exposure to room temperature air. |
| Experimental Design | 1. Collect nine identical beakers and cut celery into nine similar pieces nine centimeters long. 2. Fill three beakers to the top with salt water concentrations of 0, 5, and 10%. 3. Fill three beakers to the halfway mark with salt water concentrations of 0, 5, and 10%. 4. Fill three beakers 1/3 full with salt water concentrations of 0, 5, and 10%. 5. Put a piece of celery in every beaker. 6. Let sit overnight. 7. Record results next day. |
| Investigation Theme | CEL |
| Grade Level | High School Students (Grades 9,10,11,12) |
| Session | Spring 2019 |