University:
West Coast University
Course:
SCI 210 | Survey of Science and Technology
Academic year:

2022
Views:

415

Pages:

2
Author:

Maverick Haynes

EXERCISE 1: DATA INTERPRETATION Dissolved oxygen is oxygen that is trapped in a fluid. Because many living organisms require oxygen to survive, it is a necessary component of water systems (streams, lakes, rivers, etc.) to support aquatic life. Dissolved oxygen is measured in units of ppm (parts per million). Examine the data in Table 4, which shows the amount of dissolved oxygen present and the number of fish observed in the body of water from which the sample was taken. Then, answer the questions below. Table 4: Water Quality Versus Fish Population Dissolved Oxygen (ppm) 0 2 4 6 10 12 14 16 18 Number of Fish Observed 0 1 3 10 12 13 15 10 12 13 8 1. What patterns do you observe based on the information in Table 4? The patterns observed are as follows: The variables have a steady positive correlation, as one variable increases, so does the other As the variables increase, the level of variation between the variables increases 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. Hypothesis relating to the amount of dissolved oxygen measured in the water: As the dissolved oxygen (ppm) increases, so will the fish observed 3. What would your experimental approach be to test this hypothesis? To test my above hypothesis, my experimental approach would be to control the amount of dissolved oxygen (ppm) in a test body of water (independent variable) and then observe the number of fish (dependent variable). I would first observe the number of fish in the body of water, then vary the level of dissolved oxygen to determine the change in fish observed. 4. What would be the independent and dependent variables? The independent variable would be the (ppm) of dissolved oxygen, and the dependent variable would the number of fish observed. 5. What would be your control? My control would be the specific area in the body of water where the observation and experiment took place. If the experiment was over a span of a few days, other controls could be time of day and/or temperature of the water. A negative control would be water with 0ppm dissolved oxygen 6. What type of graph would be appropriate for this data set? Why? An appropriate graph would be a line graph, with the independent variable (the (ppm) of dissolved oxygen) being on the x-axis 7. Graph the data from Table 4. Graph shown below: 8. Interpret the data from the graph you made in Question 7. The data shows that as the dissolved oxygen (ppm) increases, the number of fish may also increase. The higher the level of dissolved oxygen, the larger number of fish that part of the water can support.

Exercise 1 Data Interpretation

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