Umuc Bio 103 Lab 1

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UMUC Biology 102/103

Lab 1: Introduction to Science

Exercise 1: Data Interpretation

Table 1: Water Quality vs. Fish Population

Dissolved Oxygen | 0 | 2 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 |

Number of Fish Observed | 0 | 1 | 3 | 10 | 12 | 13 | 15 | 10 | 12 | 13 |

1. What patterns do you observe based on the information in Table 1?

Based on the quantitative data listed above, there is a steady increase in the amount of dissolved oxygen. The number of fish observed varies at each time the amount of oxygen dissolved is measured.

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.

As time elapsed during observation, I would argue that the amount of oxygen dissolved is directional proportional the total amount of fish in the tank, regardless of whether you can see them or not.

3. What would your experimental approach be to test this hypothesis?

I would test different numbers of fish in the tank to see if the rate is proportional to dissolved oxygen.

4. What are the independent and dependent variables?

The independent variables would be the amount of water and tank size. The dependent variables would be the amount of time observed and the total number of fish in the tank.

5. What would be your control?

Testing tap versus bottled water.

6. What type of graph would be appropriate for this data set? Why?

A line graph with markers. It would be easy to show the relationship between time elapsed and oxygen dissolved.

7. Graph the data from Table 1: Water Quality vs. Fish Population (found at the beginning of this exercise). You may use Excel, then “Insert” the graph, or use another drawing program. You may also draw it neatly by hand and scan your drawing. If you choose this option, you must insert the scanned jpg image here.

8. Interpret the data from the graph made in...