Year 10 have completed a highly successful science experiment to test the ideal conditions for plant growth. We started off our work by formulating a hypothesis. The students thought that the density of seeds when planted might affect the quality of the growth.
We have been learning about the ideal conditions that all plant life needs to grow – water and light. Our theory was based around the idea that a greater cluster of seeds would be a drain on the water and light resources.
The students were asked to think of a possible way in which to test this hypothesis. We came up with the idea of planting some cress seeds in a series of dishes. Five seeds would be placed in the cotton wool of the first dish, with increments of five extra seeds in the other dishes.
As with all of our science experiments at Lansdowne School we had to make this a fair test. The seeds were watered daily with the exact same amount of water for each dish. We used the same seeds for each dish and made sure that they all had equal access to the sunlight.
Daily measurements of the seed growth were recorded. Our results proved conclusively that our original hypothesis was correct. The dish with the fewer seeds experienced the tallest growth spurt. The dish with the most seeds measured the lowest height growth.
All students have written a detailed account of this experiment in their science books. We have concluded by saying that less competition for the resources of water and lights leads to more productive plant growth.
One of our Year 10 scientists explains more about this experiment in the video above.