Investigate The Limiting Factors of photosynthesis Essay Example

plants can't photosynthesise at night.

Results table to show the amount of bubbles produced the more light there is

Conclusion:

In my experiment, I found that increasing the temperature of the acid did speed up the rate of reaction between the hydrochloric acid and magnesium. As the temperature increased, the reaction became quicker. So my hottest experiment at 60oC was my fastest, and my coolest experiment at 21oC was my slowest. The graphs show that each experiment gave off gas for a start and also that each test began quickly and then levelled off. The two tests, which were out of line on the graph the most, were the 42 oC one and the 51 oC one. When the temperature was increased, the rate of reaction also increased. This is because of the collision theory.

Evaluation:

In this experiment we had to measure the amount of bubbles produced from a piece of pondweed through photosynthesis. My experiment did go as planned but in general terms this experiment as a whole in the first place is not a very good one to do. It was hard to count the bubbles and it was really easy to miss a bubble which came up fast if you looked a way for a second. I think that I should have used my original plan and method because the gas collection tube would show me exactly how much gas is produced. We did four distances from the pondweed with the lamp during my experiment and I think that it would have been better to do five maybe. I do not think that four was a sufficient amount. The repeat results that we got were all

accurate and the range of results was no too far above or below the others.

My plan was well done but I had to change it because I was told that the gas collection tube would be too big and there would not be enough gas collected to show up which was correct in the end. We didn't have any serious problems really and it was all well thought out and well done. If I was to do this experiment again, then I would definitely use a gas collection tube and make it last a lot longer so there would be more gas produced. I may also use a wider range of distances so it would be a more accurate graph.