celery experiment, written by JohnDavid, age 11

We filled a glass ¼ full of water, and put in 10 drops of blue food coloring. Then we stuck in a stalk of celery. After 15 minutes, we looked at the bottom of the stem and saw blue dots on the bottom. After 30 minutes, it was still the same.
The next day, the leaves were bluish. When we broke the celery in half, it was blue on the strings. The xylem was transporting the water that had the food coloring up to the leaves. And when the leaves made food, it would transport it down the phloem where it be stored in the cortex so when the plant needs it, it would have food. The leaves were stained around all the edges.
This proves that xylem, phloem, and the leaves play a very important part in helping the plant grow.

by: JohnDavid, typed by Mom