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Materials

The materials required for this science fair project are:

-    10 empty resealable bottles
-    transportation
-    pH paper
-    a turbidity meter
-    a freshwater test kit
-    1 marker pen
 

Procedure

1.    The independent variable for this experiement is the location at which the water sample is taken. The dependent variable is the pH reading, turbidity, ammonia content and the nitrate content of the water sample. This is determined  using the pH paper, turbidity meter and the freshwater test kit. The constant(control variables) are the amount of the water in each sample.

2.    The independent variable for this experiment is the location at which the water sample is taken (ie: upstream or downstream). The dependent variable is the pH reading, turbidity, ammonia content and the nitrate content of the water sample. This is determined  using the pH paper, turbidity meter and the freshwater test kit. The constant (control variables) are the amount of the water in each sample, and the river from which the samples are abtained.

3.    Locate a river which originates from an unpopulated hill. Ensure that downstream the river passes through, or near a town (ie: densely populated area) Collect 5 samples of the river water upstream. Use an empty bottle to do this, and label it “upstream”. 

4.    Collect 5 sample of the river water downstream. Use an empty bottle to do this and label it “downstream”.

5.    The 10 bottles of water are  then tested for their acidity using the pH paper and their turbidity is also tested using the turbidity meter. The fresh water test kit is used to test for the water’s ammonia and nitrate content. The results of the tests are recorded in the table provided  below.
 

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Complexity level:
7
Project cost ($):
60
Time required:
1 day for preparation, 1 day for observation
Material availability:
You will require transportation to the various river locations
Safety concerns:

 Basic safety requirements