A glass of water
fresh piece of celery with the leaves on it
food coloring, your choice of color
What to do:
1. Cut off the bottom of the celery, but not too far up the stalk.
2. Put two or more drops of food coloring in the water. Now the water is polluted.
3. Put the celery in the “polluted” water and pretend it is a tree. Then wait for a little while.
4. After a little while, go back and check the celery. You will notice that the “polluted” water has climbed up through the celery stalk.
What you discovered: When you “polluted” the water with the food coloring, the celery tried to drink the water, which made the water and the coloring come through the stalk. This shows that if we pollute the water, living things will be affected when they use the water in almost any way.
