this IS the LAST time i'm going to do this!

I, dharani nadarajah have heard from a reliable source that ALL fruits/veggies have even the tiniest amout of acid and therefore, she cannot do her experiment because all of the fruits/veggies will conduct electricity even if it is a very very small amout. So, dharani shall change her idea for the 4th time :(
The experiment is to determine which soil is the most absorbant and that the more viscous(meaning: having a reletively high resistance to flow) pollutant would be most absorbant.

Equipment: Soils (sand and clay), pollutants (oil, petrol and engine coolant), 30 plastic cups, plastic filter, measuring cup and stopwatch.

Method: Place the plastic filter on the cup making sure that it won't fall off. Put 250 mg of sand in the filter and measure out 250 mL of oil in the measuring cup. Then pour oil onto the sand and let the oil be filtered for 60 seconds. When 60 seconds is over remove the filter and record the amount of oil is in the cup on a table then subtract this number by 250 mL to find out how much of the oil is actually absorbed by the sand. Record this number on the table as well. Repeat these steps with petrol and sand and again with engine coolant and sand. Now, repeat the steps with clay. After, repeat all the steps above twice to make sure the results are acurate. (This may be a little time consuming...)

The independent variable are the pollutants and the types of soil
The dependent variable is the amount of absorption
The constants are the filter used, the amont of soil, the amounof pollutant, how long the soil will be filtered for and the temperature of the pollutants (room temperature)

I have got to control myself and not change my mind about this experiment (ha ha! get it CONTROL!)
hope this gets approved... good luck dharani
love dharani (off to email Ms. Zhang!)