We have already tried changing the colours of white carnation flowers, so the boys sort of guessed what was going to happen with the celery this time.
For our freebie today: You can download our free Science Experiment Worksheet which will help you write up your colourful celery experiment.
What you need:
tall, clear cups
What to do:
Fill the cups up about three-quarters fill.
Stir a few drops of food colouring into each cup. We used blue in one cup and red in another.
Chop about 2 cm off the end of the celery at a slight angle.
Place one piece of celery in each cup.
Leave the cups in a safe place and watch them over the next few hours to see what happens. The longer you leave the celery in the coloured water the better.
The science behind it.
The xylem (tubes that carry water through a plant) carry the coloured water through the celery and into the leaves. It works by capillary action. After a few hours the leaves will start to change colour.
Though the boys guessed what was going to happen, they thought it was great to watch the colours go up the celery stalk into the leaves.
Have you tried changing the colours of flowers or vegetables?