Saved science fair projects:
This is a saved copy of the relevant third party website. We save only the first page of every project because we've found that the third party sites are often temporarily down. We do not save all pages of the project because copyright belongs to the third party author.
The purpose of this experiment was to determine the effect of a certain species of algae when they are growing at different temperatures. I became interested in this idea when I saw that more algae was on the beach in Oregon then there was on the Washington shore. The information gained from this experiment can help people who grow and use algae to know how warm or cold the algae should be growing in.
HYPOTHESIS My hypothesis is that the algae will grow better in water at about 20 degrees Celsius. I also think that algae won’t grow when the water is either extremely warm or extremely cold. I base my hypothesis on the fact that algae grows pretty well in Washington water where the water is not very warm, but grows better in Oregon where the water is a few degree’s warmer. EXPERIMENT DESIGN The constants in this study were:
The manipulated variable was he temperature of the water that the alga
was growing in.
The responding variable was the growth of the algae after one week.
To measure the responding variable I used a colorimeter to see how much color there was in the different plant samples. MATERIAL LIST
PROCEDURES 1. Order algae plants (spirogyra) from a science magazine.
RESULTS The original purpose of this experiment was to measure the amount of color in five different groups of algae plants each growing at a different temperature. The results were that the plants growing in water at about 35 degree’s
had the most color in them. The plants that were growing in water
at about 25 degree’s had the least color in them.
My hypothesis was that the plants growing at 20 degree’s would have a higher amount of color. The results indicated that this hypothesis should be rejected because the plants grew best at 35 degree’s Celsius. Because of the results of the experiment, I wonder if all algae plants grow best in water around 35 degree’s. These findings could be useful to the people because farmers who grow algae will know what temperature the water should be for the plants. Also people who want to prevent algae growth could use water at about 25 degree’s. If I were to conduct this experiment again I would use distilled water instead of tap. I would also try harder to keep the water temperature the same.
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