Nature's Secret Meteorologist: Weather Experiment with Pine Cones
While walking in nature, have you noticed that the cones on the ground are sometimes tightly closed and sometimes open like a fan? This is not a coincidence! Pine cones act according to the humidity in the air to protect or spread their seeds at the right time.
In this article, we explain how you can turn this miracle of nature into a "Weather Station" with materials at home.
Materials Required
1 large pine cone
1 long skewer or a thin piece of branch
A piece of play dough (for fixing)
A cardboard box and pencils for background
Step by Step Application
Preparation: On the inside of the cardboard box, draw a "Rain Cloud" on the top and a "Sun" on the bottom.
Attach the Needer: Carefully stick or squeeze the tip of the skewer into one of the scales on the bottom of the cone.
Fixing: Fix the pine cone vertically to the bottom of the box with the help of play dough, with the pointer in the middle of the drawings.
Observation: Place the device in an open area such as a balcony and observe which direction the needle is pointing for a few days.
What Do We Learn From This Experiment? (Scientific Explanation)
Pine cones show hygroscopic properties. In other words, they can absorb or release moisture in the environment.
If the weather is humid (rain is approaching): Cone scales absorb moisture and swell and close inward to protect the seeds from getting wet. This movement lifts the attached garbage skewer upwards (to the clouds).
If the Weather is Dry (Sunny): The cones dry, the scales open and allow the seeds to be dispersed by the wind. In this case, the garbage skewer is tilted downwards (towards the sun).
Frequently Asked Questions
Why doesn't the pine cone move immediately? Since this is a mechanical reaction, it may take several hours for it to detect the change in humidity in the air and change its physical form.
Does it happen with every cone? Yes, but the results are seen more clearly in pine cones with distinct and healthy scales.
Tip: This activity is a great STEM (Science, Technology, Engineering, Mathematics) project for preschool and elementary school aged children. You can keep an observation diary with your child by noting the weather forecast every day!
