Y11 Design Science Experiment to Show Photosynthesis

Year 11 are working on some practical science learning involving photosynthesis. We have completed our theory learning. Some practical experiments in the Lansdowne science lab followed.

One of the key parts of our learning is to think about how plants can provide us with oxygen. The Year 11 students are using new vocabulary such as photosynthesis, light intensity, and carbon dioxide. Our lab work was our first assessment ahead of the Entry Level Three science qualification.

We have seen how pond weed is able to provide oxygen for lifeforms in the water. We were able to observe tiny bubbles forming in the water. This showed the pond weed creating oxygen.

The students set up an experiment that involved changing some of the factors that help to create photosynthesis. We have seen that light is a key component.

Our experiment involved shining a bright light on a test tube with some pond weed for a set amount of time. We repeated this activity, changing the distance of the light from the pond weed.

The students predicted that the rate of oxygen being created would decrease as we moved the light source further away. We carried out this experiment, measuring the light at 20, 40, 60, 80 and 100 cm.

Our predictions turned out to be true. Our data showed that the further the light source is away from the pond weed, the less oxygen is created. Our results were put together in a graph form to show the photosynthesis that had taken place.

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