Final Idea/ Hypothesis

Hi all, I have finally decided on a science experiment problem that I am happy with and that will work with all the guidelines of the experiment. My idea follows 'Does the turbidity of different liquids change when they are naturally filtered?'. 


My hypothesis for this idea is 'The turbidity of the dirty water will change the most drastically when it is filtered.' 

I have arrived at this hypothesis due to the background research I have completed. In the dirty water I will be adding a small bowl of garden dirt to 1 cup of water and 1/4 teaspoon of vegetable oil. The turbidity of a liquid is the cloudiness or haziness of a fluid caused by large numbers of  particles that are generally invisible to the naked eye. The measurement of turbidity is a key test of water quality. When a liquid is filtered (such as dirty water) the particles are removed during the filtration process and commonly you are left with clear water. The particles have been removed when the liquid is filtered therefore making the liquid clear with decreases the turbidity of the water. The other liquids I am testing such as soft drink, black tea and soapy water  do not contain as large particles as the dirty water (as the soil does not dissolve) therefore when these liquids are filtered they may not change there turbidity as drastically as the dirty water. This is the reasoning for arriving at my suggested hypothesis. I look forward to completing this experiment.