# Lab 1: Introduction to Science

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• Published : November 9, 2012

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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? -The more dissolved oxygen in the water, the more fish is observed in that area 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. -If there is more dissolved oxygen in the water, there will be more fish present in the area the water sample is taking from.

3. What would your experimental approach be to test this hypothesis? -I would test the dissolved oxygen in different areas of water, keep track of the fish in those areas and compare the results.

4. What are the independent and dependent variables?
-Independent- Dissolved Oxygen
-Dependent- Fish

5. What would be your control?
-No Control

6. What type of graph would be appropriate for this data set? Why? -A line graph will be appropriate because it supports the hypothesis and provide clear results.

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 Question 7.
-The graph above shows the fish population on the Y (axis) and the dissolved oxygen on the X (axis). The fish population increases in the above graph due to more dissolved oxygen that is found in the body of water. For example: There is 0 dissolved oxygen (ppm) in the water, so there is 0 fish observed.

Exercise 2: Testable Observations-

Determine which of the following observations (A-J) could lead to a...