Plants have developed may strategies for dispersing their seeds. Grade 7 students collected seeds on our walks in Humlegården and in our own school yard. One dispersal method we tried to model was the "helicopter" strategy that lime and maple trees, among others, use.
Students built their own models of seed dispersers. I am always surprised at the way these students come up with new ideas. Here is a seed carrier model using feathers.
Other students made classic paper helicopters and changed the mass or wing size. It was important to only change one variable in order to have a fair test.
Students dropped their models and timed how long they took to hit the ground. We used the assumption that the longer seeds are in the air, the greater chance they have to travel away from their parent plant.
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