Recently in Year 5, we have been observing the life-cycle changes in a variety of plants. We began by retrieving what we knew about seed formation and seed dispersal from our learning in Year 3. We discussed how different plants dispersed their seeds.
Dispersal is the spreading of things over a wide area. Dispersal of seeds is very important for the survival of plant species. If plants grow too closely together, they have to compete for light, water and nutrients from the soil. Seed dispersal allows plants to spread out from a wide area and avoid competing with one another for the same resources.
When dandelion seeds break free from the flower head, these bundles of hairs catch the wind and carry their seeds.
The Himalayan balsam seedpods explode when touched or shaken.