The Effects of Lawn Fertilizer on Lakes and Algae Growth

Gerald Bonebreaker

Per. 4

Purpose

My experiment examines the phenomena of algae growth in lakes. The background information about algae is… The background information about lawn fertilizer is… Together we can find something useful about the pollution problem from lawn fertilizers and its effects on Minnesota lakes.

Independent Variables

Dependent Variables

  • Color based on the gradient scale
  • Absorbance on the Colorimeter

Control Variables

  • Amount of water
  • 24 hours light in the growth chamber
  • Constant temperature
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Hypothesis

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Materials

  • 5 test tubes
  • algae
  • colorimter
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Methods

  • We measure 30 ml algae in each test tube
  • Then we added…
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Data Collection Table

Sample table:

Beaker
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Lab Setup Drawing/picture

Graph of results

Conclusions-

What trends are there in your graph(s)? Was your hypothesis correct? Which treatment level grew the most algae? The least? What do your results tell you? What effect did your independent variable have? What effect does fertilizer have on algae growth in lakes/rivers?

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Outside Research : Research how fertilizer affects various kinds of aquatic living things. Be sure to research organisms that are similar to the one(s) you used in your experiment. This research section should include a bibliography of sources, cited in MLA format, and should be more than a half a page but less than 1 page, single spaced, font 12, typed.

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Evaluation

What went well and why? What went wrong and why? What would you try differently next time?What are some reasonable improvements? What future experimentation might need to be done? How do your results compare with the outside research you did?

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