Dissolved oxygen is oxygen that is trapped in a fluid, such as water. Since many living organism requires oxygen to survive, it is a necessary component of water systems such as streams, lakes and rivers in order to support aquatic life. The dissolved oxygen is measured in units of parts per million (ppm). Examine the data in Table 4 showing the amount of dissolved oxygen present and the number of fish observed in the body of water the sample was taken from; finally, answer the questions below.
1. What patterns do you observe based on the information in Table 4?
The more dissolved oxygen there was the more fish that were in the body of water.
2. Develop a hypothesis relating to the amount of dissolved oxygen measured in the water sample and the number of fish observed in the body of water?
The more dissolved oxygen that there is in a body of water will result in more fish in that body of water.
3. What would your experimental approach be to test this hypothesis?
The best approach to this experiment would be to observe different bodies of water with different levels of dissolved oxygen and observe the number of fish in that body of water.
4. What would be the independent and dependent variables?
The independent variable would be dissolved oxygen and the dependent variable would be the number of fish.
5. What would be your control?
The control would be the time of day, temperature or any other environmental conditions that might impact the results.
6. What type of graph would be appropriate for this data set? Why?
The type of graph that would be appropriate for this data is a bar graph because all of the results are independent from each other and is not an continued series.
7. Graph the data from Table 4: Water Quality vs. Fish Population (found at the beginning of this exercise). Describe...