Group Lab Project

Group Lab Project - SCI 100 TU/TH 1:00PM Group Project Lab...

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SCI 100 – TU/TH 1:00PM Group Project – Lab Report Salinities due to Construction 11/18/2010
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G oing around campus during the nature walk, we examined quite a bit of streams that encircle UMBC; most that we didn’t even know existed! We also did the Estuary and Chemical Analysis of Water Samples labs which involved a lot of hands on testing of the water. So in a mixture of the two, we thought about how we hadn’t seen any fishes in any of the streams we visited around campus – so what in the water caused that? We thought about how construction/deforestation affected the population of snails in the Estuary lab and realized that maybe construction around the campus affected our streams too. We did conductivity tests in order to determine salinity in the Estuary and Chemical Analysis labs and we similarly modeled this experiment to determine salinity levels of water from streams, throughout campus (Readel, 1). We could not sample just one area since UMBC is built around a circle and urbanization is not central in this case. With all these observations and the idea finally built in on how we want to work this project, we came up with our hypothesis; the construction on campus impacts the salinity levels in the waterways on the UMBC campus. Further, we predict that the measured salinity levels in the waterways closer to the construction areas will be higher than salinity levels measured in other parts of the UMBC campus. Methods BEFORE ANYTHING: You must create the salinity control samples. This will help you with your standard curve. If you see the controls below, you can see the amounts that you must have. Since we know how to mix the samples to measure out our own salinities, we can use that and measure the conductivity and then create a standard curve. With that, we can compare the conductivity of our samples to estimate the salinity of them too. To begin creating samples, we want a ratio of 10ppt in each solution, so take 200mL of water and add 2g of salt to get 10g/L or 10 ppt solution. To Create Samples: 0ppt sample – Use just distilled water 0.5 ppt sample – Use 28.5mL Water with 1.5mL of salt solution 1.0 ppt sample – Use 27mL Water with 3mL of salt solution 1.5 ppt sample – Use 25.5mL Water with 4.5mL of salt solution 2.0 ppt sample – Use 24mL Water with 6mL of salt solution. 1. Collect 28 water samples from around campus (at the following locations) in plastic bottles provided. Name/Location
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This note was uploaded on 08/28/2011 for the course SCI 100 taught by Professor Cantremember during the Fall '08 term at UMBC.

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Group Lab Project - SCI 100 TU/TH 1:00PM Group Project Lab...

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