Two-Tone Water Transport
Materials:
- 1 white flower (or stalk of celery)
- sharp knife
- 2 glasses of water
- 2 colors of food dye
Directions:
- 1) Put a teaspoon of one color of food dye into 1
glass of water. Then put 1 teaspoon of the other color of food dye into the
other glass.
- 2) Cut about 5 inches of the flower's stalk from the
bottom.
- 3) Stand glasses close together and put one of the
stalk halves into each glass, making sure not to break or bend the stems too
much.
- 4) Leave the flower in the water overnight. What do
you see in the morning?
Explanation: Like roads, the
tubes (phloem) that carry water to the petals of the flower don't all go the
same way to the same place. If you used celery, you should be able to see the
phloem tubes easily with the naked eye.
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