lI do not know how to begin with figuring this out. Biology 101: water quality v
ID: 8285 • Letter: L
Question
lI do not know how to begin with figuring this out.Biology 101: water quality vs fish population?
Table:dissoved oxygen (ppm) 0 2 3 6 8 10 12 14 16 18
number of fish observed 0 1 3 10 12 13
1)Based on the information what patterns do you observe?
2)Develp a hypotheses relating to the amount of dissolved oxygen measured in the water sample and the number of fish observed in the body of water?
3)What would your experimental approach be to test this hypotheses?
4)What are the independent and dependent variables?
5)What would be your control?
6)What type of graph would be appropriate for this data set? Why?
7)Graph the data from the table above
8)Interpret the data from the graph made in question 7
Explanation / Answer
1) As the level of dissolved oxygen in the water increases, the fish population also increases.
2) If there is a high amount of dissolved oxygen present in the water, than there will be more fish.
3) Measure the amount of dissolved oxygen present in different areas of the body of water, and count the amount of fish observed in each area.
4) An independent variable is the variable which you change in an experiment. A dependent variable is the measure of the independent variable. Do you notice how the number of fish depends on the amount of dissolved oxygen? Thus, the dependent variable is the amount of dissolved oxygen, and the independent variable is the amount of fish.
5) A control must stay constant, therefore, the control variable can be an area of the body of water which does show any change in dissolved oxygen content.
6) A line graph is fine because they are typically used to display a comparison between an independent and dependent variable.
Please do questions 7 and 8 on your own. I hope I have helped!
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