Each of these will be set to shine with different equations of ‘baby bin’ fertiliser added.
No drops, one drop, two drops, three drops, and ten drops.
Results
Conclusion
By looking at my results I can see that my prediction has been justified.
Full light is when there is nothing stopping the light from reaching the duckweed and on the LUX meter it read that there was 81% light.
Partial light was when the light had to pass through tissue paper in able to get to the duckweed and there was a reading of 77%.
No light was when the light had to pass through black sugar paper and there was a reading of 33%.
Each experiment was carried out twice and both sets of results can be seen above, and then followed by the average of the two brackets.
In full light the duckweed population grew with and without fertilizer. It had a steady rate of growth, but each week it went up, some times by a substantial amount and sometimes with a minimal amount.
In partial light the duckweed population grew but very slowly. At all times the population was around the same mark. There was a slight drop of the duckweed population towards the end of the experiment, at day 42 all of the tests died out causing the population of duckweed to decrease.
The population of duckweed in no light didn’t increase that much. The first week the weed the duckweed increased but then the week after it had already started to decrease. The duckweed with no fertilizer completely died out, it rapidly decreased each week and by the end of the experiment there was no duckweed left. In all of the other tests there was still some duckweed left but not that much.
In all experiments the more fertilizer that was used the more the duckweed increased.
Evaluation
This has been an event full experiment, but it wasn’t really a fair test. There are many factors that I would change if I was to do the experiment again. Counting duckweed isn’t very accurate as each individual duckweed could weigh a different weight. I would weigh the duckweed next time and make sure I have them all the same weight, so then it is more reliable.
I would also do the experiment in different conditions, such as temperature, I would try it in a fridge, body temperature, a greenhouse and at room temperature. There is a slight disadvantage to doing this at room temperature as the room temperature is not the same all the time, and if I was to put the experiment in the fridge it wouldn’t see natural sunlight and photosynthesis may not take place.
My prediction is well founded because of what happened in the results,
