In science club we made walking rainbows using paper towels and food colouring. The children made predications and ensured they used scientific vocabulary to do so. The children worked in groups to plan and carry out their experiment. The children were fascinated to hear the science behind the experiment:
The water moves up the paper towels through a process called capillary action. The paper towel is made from fibers and the water is able to travel through the gaps in the fibers. The gaps in the paper towel act like capillary tubes and pull the water upward. This is what helps water climb from a plant’s roots to the leaves at the top of the plant or tree.
The water is able to move upward against gravity because of the attractive forces between the water and the fibers in the paper towel.
We are so excited to see the results.
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