Photosynthesis
Abstract
When doing the investigation into photosynthesis, we found out that its rate is effected depending on the filter covering the plant that is photosynthesising. The reason this happened is due to the fact that coloured filters only allow a certain wavelength of light through so this will decrease the rate of photosynthesis due to a lower light intensity on the plant.
Introduction
Cabomba is an aquatic plant which is known for its ability to oxygenate water at a high rate due to how well it can photosynthesise. However, in places of the world where the cabomba is found, the plant is seen as a pestilential plant. It is a plant that photosynthesises well and the more light exposure the plant receives, the high the rate of photosynthesis.
The reaction that is going to be affected in this experiment that I did is the light dependant reaction. This is due to me changing the filter that was covering the cabomba plant from no filter, to red, and then to a blue filter.
The way that these different filters will affect the rate at which the plant photosynthesises is that different colours only allow certain wavelengths to pass through while the others are absorbed. This means the different levels of light intensity are going to be absorbed into the chloroplasts and therefore either reduce or increase the rate of photosynthesis.
Methodology
Equipment:
-Cabomba plant
-Sodium hydrogen carbonate
-Funnel
-Blue and red filter
-Ruler
-Stop watch
-Syringe
-Beaker
-Lamp

Variables:
Control: - the control variable is the lamp without a filter
Independent: - the independent variable is the filters that cover the lamp
Dependant: - the dependant variable is the amount of time it takes for 0.1ml of water to be displaced

The method I used to do my experiment was that I firstly began by filling a