Have you ever wondered How pine cones open and close? Try this experiment to find out more!
What you need:
3 Pine Cones of the Same Size
What to do:
Sketch and write down your observations about each pine cone. Then place one pine cone in each jar.
Label each jar. Then fill one with warm water, one with cold water and leave one jar for comparison with no water in it.
Write down what is happening in each jar and your other observations about the pine cones.
Leave the pine cones in the water over night to see if anything else has changed.
What does this show us?
This experiment shows us that pine cones open more when they are in dry and humid environments, but when they are in cold and wet environments the pine cones close.
The pine cones release their seeds when they open in warm and dry environments but close so that seeds aren’t released in cold and wet environments.
This is because when pine cones are wet their cells expend and when dried up pine cones shrink up and open. To see an example of this try wetting a sponge to see how it expands when wet in comparison to when dry.
For more information and pictures please visit http://parentingchaos.com/why-do-pine-cones-open-and-close/