Excersice 1: Data Interpretation

Exercise 1: Data Interpretation

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.

Questions

What patterns do you observe based on the information in Table 4?

Based on the information Table above, I can see that as the dissolved oxygen increases, so does the number of fish.

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.

My hypothesis relating to the amount of dissolved oxygen measured in the water sample and the number of fish observed in the body of water would be: Based on the graph above, If you increase the amount of dissolved oxygen in the water, then more fish will be observed because fish need oxygen for cellular respiration.

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

My experimental approach to test the hypothesis would be:

Create a series of aquariums with different levels of dissolved oxygen (0ppm, 2ppm, 4ppm, 6ppm, 8ppm, 10ppm) including one take designed to have the exact same conditions as the pond the minnows come from.  Place 100 minnows in each tank.  Take data daily on number of fish in each tank.  Proceed for a week. And see how many fish survived in each tank.

5.)What would be your control?

My control for this experiment would be to use the same temperature, body of water, amount of light, same amount of fish food.

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

I think a table data graph like above would be appropriate...