What you need: White flowers with long stems, like tuberoses, jasmine or zinnia, food colouring, water and a plastic container.
What you do:
1. Fill the plastic container with water and add some food colouring.
2. Cut the ends of the stems of the flowers and put them in the coloured water.
3. Check the next day.
What happens?
The petals would have tumed the colour that you added to the water!
Why?
The plant draws up water from the soil through the roots and then up through the stem. As the water evaporates from the tiny pores in its leaves and flowers, the plant draws up more water. Since the flowers in the container didn’t have roots, they sucked up the water through the stem.
Try this!
Split the stem vertically down the middle and plant the halves in containers with water of two different colours. What happens?
Fact of the matter
Plants draw up water from earth continuously. Cut flowers have to be put in water right away, otherwise an air bubble will form in the stem. Then the flowers will be unable to draw up any more water!
Picture Credit : Google
