Abstract:
For the Water Quality project the two original variables we chose were pH and Percentage of trash at each varying test site. The third variable we chose was BOD WQI. pH is a value that measures the acidity or alkaline of a solution. BOD stands for Biological Oxygen Demand. BOD is a measure of the oxygen used by microorganisms to decompose waste in water. BOD is measured in parts per million. WQI stands for water quality index. What water quality index tells us is the estimation of overall quality in a body of water. We studied these variables because we predicted that three variables will illustrate a strong positive correlation. We used lamotte kit to get our data. Thelamotte kit was able to to get the mesurements for different variable . We used other equipment like refractomitor. the refractomitor mearures the salt content in water. We were able to record vidual datawith the Flip Camera. For internet resources we used Microsoft Excel, Wikispaces,five creeks.org, and googe spread sheets to transfer our data. In our hypothesis we predeicted that a higher percentage of trash would not affect in any way the pH of the water we tested. However, whatever grew in the trash may have affected it.
Hypothesis:

We believed that a higher percentage of trash would not affect in any way the pH of the water we tested. However, whatever grew in the trash may have affected it.
Procedure:
The Technological tools we used for this project was wikispaces, Google Docs, and the internet. The mathematical tools we used for this project was excel, r^2, and best fit line. We coolected our data on saturdays at our five varying test sites. to collect the data we used our water testing kits. After all test sections were completed we recorded our data in a spread sheet. It was a group decision to use BOD WQI as our intermediate variable.
Background:
The first variable we used was pH. pH measures the acidity or alkaline of a solution. In order to figure out if a solution is a weak or strong acid or base we use a pH scale. The pH scale is numbered from numbers 0-14. A pH of 7 means the solution is neutral while a pH of something less than 7 is acidic and something higher than 7 is basic. There are many common uses for pH and the pH scale in daily life and research. For example, when visiting the doctor for a check-up you are often asked to urinate in a cup. The doctors measure a person’s urine with the pH scale. The number given indicates if the fluids in the body are being excreted correctly if not they can cause bodily harm. Another use for the pH scale is water management. Pollution in water can harm the many organisms living with in the water. Knowing the pH of a solution such as water would be able to save the organisms living within that community.
The second variable chosen was percentage of trash within a test site. Our variable measures how the percentage of trash affects each test site. This variable also gives us an estimate of how much trash there is in a specific area. Other people with their research use this variable to measure trash levels with plankton levels. For example, for every six pieces of trash, there is one plankton, or there is six times more trash than plankton in that area. This test is usually performed in an area where trash is often accumulated and in the ocean where plankton is found.
The last variable chosen was our intermediate variable, which is BOD WQI. The BOD in BOD WQI stands for Biological Oxygen Demand. BOD measures the Amount of oxygen used by microorganisms to decompose the waste in water. WQI stands for water quality inde. WQI measures the quality of water. What this means is WQI gives an estimation of the water. It tells us if the water is safe, drinkable, etc. BOD WQI in other peoples research is used for water/ waste management. We chose our three specific variables because we thought they would have a correlation. We forsee a correlation between the amount of trash found on the test site and the level of pH of the water.




SpreadSheet:

Date
PH
BOD
TRASH
1
2.20.10
7
4
1
2
2.20.10
6
4
45
3
2.20.10
6
4
60
4
2.20.10
8
0
45
5
2.20.10
7
N/A
50
1
2.27.10
8
0
1
2
2.27.10
8
1
60
3
2.27.10
7
2
20
4
2.27.10
7
0
1
5
2.27.10
6
2
1
1
3.6.10
7
8
1
2
3.6.10
8
2
30
3
3.6.10
6
1
30
4
3.6.10
7
2
1
5
3.6.10
7
2
10
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Analysis:
There was a weak correlation between our first chosen water quality pH and our intermediate BOD WQI. It had an r^2 value of 0.1154. None of the points had any connection. There was absolutely no correlation at all between our two water quality variables pH and Percentage of trash. The two variables had an r^2 value of 0. Last but not least there was a weak correlation between percentage of trash and BOD WQI. This connection had an r^2 value of 0.0481. Given the relationships between all our variables we could predict they were not going to have any connections at all. The relationships do not support our hypothesis at all. Originally we hypothesized that there would be a connection between Percentage of trash and pH because the bacteria that grows on trash affects the pH level of water.

Conclusion:
In conclusion, the research did not support out hypothesis because we originally believed that there would be a connection between Percentage of trash and pH because the bacteria that grows on trash affects the pH level of water. Also our research had limitations to it as well. One of the samples collected from one of our testing sites was lost due to a break of the vile. Also one of our researchers accidentally poured out our testing vile of water so we lost more data. A final limitation in this project would be not being able to attend every testing date to personal reasons. So some of us were not able to be there and experience that testing date for ourselves. This could affect because we were not there to get the data for ourselves and we were dependent on others to record the data, maybe they didn’t do so. A new variable we could use to further support or refute our hypothesis would be turbidity.