| Explore | The higher the salt solution that the celery was left in the more flexible the celery, and the longer the celery was left in the food coloring solution the more the celery would turn blue. |
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| Research Question | Would the entire stalk of celery turn blue and reach maximum bend after a certain period of time? |
| Predictions | Yes, the whole stalk would turn blue and reach maximum bend, but it would need more time, food coloring, salt, and water. With the short amount of time we had our celery in the water, it turned blue quite a bit and was pretty bendy. With more time, water, salt, and food coloring, the whole stalk would have to turn blue and bend until it touched each end of the stalk. This is because the coloring can't just go to the same places, it would have to spread. It would also become so absorbed of salt water that it would have to reach maximum bend at some point. |
| Experimental Design | We will test this by performing the salt experiment but adding food coloring. We would also add more salt to our mixtures than what we first started with. Our mixtures would be 20% solution of salt in 200 mL of water with 5 drops of food coloring, then 30% solution with 10 drops of food coloring in 200 mL of water, then the last solution would be no food coloring and no salt in just 200 mL of water. We would then leave it in for a longer time than we did for the original experiment, for 3 days. The celery would be fully covered with water and there would be 3 sticks of celery in each cup. |
| Investigation Theme | CEL |
| Grade Level | High School Students (Grades 9,10,11,12) |
| Teacher Name | Emily Richbourg |
| School Name | Anna-Jonesboro High School |
| Session | Fall 2021 |