Essay on Isp 217l

8568 WordsJul 7, 201135 Pages
Water and the Environment Laboratory ISP 217L Spring 2011 Laboratory Manual* Table of Contents Exercise Lab 1. How much does temperature vary in large and small aquatic environments? Lab 2. What determines the water clarity of lakes, rivers and oceans? Lab 3. Where does the phosphorus go? Lab 4. How does human activity in watersheds affect the quality of lakes and rivers? Lab 5. Are the Great Lakes being influenced by the global greenhouse effect? Lab 6. How is the flow of the Red Cedar River influenced by the weather? Lab 7. What is the relationship between flow and turbidity in the Red Cedar River? Page 2 4 6 8 12 15 18 * Note that the Excel Manual is a separate booklet. Revised 12/10 JDW ISP217L Laboratory Manual Spring…show more content…
If temperature varies from 16 to 25 degrees each day, the standard deviation of temperature will be greater than if temperature only varies from 20 to 22 degrees each day. The standard deviation can be calculated using Excel (we will see how in class). You will want to make graphs and/or tables of these relationships for your report. Here is an example of the type of graph you will need to make. By convention, the independent variable (the “cause”) is plotted on the x-axis, while the dependent variable (the “effect” or consequence) is plotted on the y-axis. In the example below, which is the independent variable and which is the dependent variable? Age (years) 2 3 4 5 6 7 8 9 10 11 12 13 Height (cm) 91 99 107 112 117 124 130 135 140 145 150 155 200 Height (cm) 150 100 50 0 2 3 4 5 6 7 8 9 10 11 12 13 Age (yrs) Figure 1. Children’s height vs. age Questions to answer in your lab report. NOTE: some questions pertain to the week 1 exercise, some to week 2, and others to both. How is the amount of temperature variation related to the volume of the water body? How might you measure the speed of temperature change? How would you expect the speed of change to vary with habitat volume? Are water temperatures different than air temperatures? How are they different? Are there any cyclical patterns in the temperature-logged data (“time series”) from Angel? If so, what do you think caused these repeating patterns? Based on the results of this exercise, how might you

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