Lab 2

Questions

1. Based on this information, what patterns do you observe?

This information is making me think that is there is always an inverse to what is being said. For example, if you want to create a hypothesis, there has to be a null hypothesis contradicting what your hypothesis is. Whenever it comes to variables, there are some that you can control and others that you cannot control. When it comes to graphs, you have to use the right one and show the information gathered from your observations.

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 were an increased amount of dissolved oxygen measured in the water sample then the number of fish observed in the body of water would increase as well.

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

I would have different series of aquariums with different level of dissolved oxygen (0ppm, 2ppm, 4ppm, 6ppm, etc.) including one standard design where the environment is comparable to the subjects, for example minnows. Place 50-100 minnows in each tank. Take daily observations on the quantity of fish in each tank. Remove dead fish if necessary and continue between 1-2 weeks.

4. What are the independent and dependent variables?

Independent: amount of dissolved oxygen

Dependent: number of fish observed

5. What is your control?

Control: temperature, body of water, amount of light and amount of fish food

What type of graph is appropriate for this data set? Why?

A line graph because it shows the relationship between variables showing a direct relationship and dependence between each point connected.

6. Graph the data from Table 2 (above) in the space below.

[pic]

7. Interpret the data from the graph made in Question 7.

The graph above shows the fish population on the Y-axis and the...