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The conclusions of science depend on experiments. When well-designed experiments are performed and analyzed, many issues may be settled. But the new knowledge derived from well-run experiments also engenders new issues, and this becomes a part of the creative growth of science. Were you able to answer the research question that directed your research? Were there other variables that prevent you from making a claim to knowing something? Can you refine your work to get a better result? These are qu estions that you should be asking yourself as you continue your work.

Also, as you were working, you no doubt had other areas of concern and interests come up. Remember to refer back to the research questions that have been submitted by the KanCRN community as a part of this guided research. How are water quality standards set? Experiments are constant attempts to establish the correctness or fallacy of thoughts and ideas. Thus, experimentation is the way science attempts to settle controversy. When well-designed experiments are performed and analyzed, the controversy may be settled. But the new knowledge derived from well-run experiments also engenders new controversy, and this becomes a part of the creative growth of science.

Water pollution was once thought to be a local problem. Now it has expanded to a regional and global problem. One reason is the enormous volume of waste released - - for example, in lead can cause serious health problems, especially in children and heavy metals in water are becoming an increasing problem. Acid rain can cause lakes and forest to dies. pollutants originating in one country may cause damage in other countries. Water tends to tie people together.

The absence or presence of a particular animal species in an aquatic community can often indicate much about the physical conditions and general quality of the habitat. Specifically what it indicates, we are not always sure. Certain species or taxonomic groups have rather specific tolerances to physicals and chemical properties of their habitat, such as temperature, dissolved oxygen content, degree of siltation, stream velocity, degree of pollution, etc. Understanding these relationships is very important information to understand the impact of our actions on the environment.

One very important area of research deals with the improvements we try to make. For instance, if you put in a low water dam to increase surface area of water exposed to the atmosphere, does in increase the Water Quality Index. In other words, as we make improvements to a stream, do we really improve the water quality?

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