Variables:
The variables that needed to be controlled
in my experiment was the area in which I collected my 2nd set of
samples for both water and soil had to be from the same area as the first area
I collected the samples.
The equipment I needed for the collection
of my samples was 3 water bottles for the water samples and 3 plastic
containers for the soil samples. The equipment needed for the analysis of the
samples was:
Test tubes, Data Logger, pH probe, Silver
Nitrate, Turbidimeter, Phosphate strips, Oven, Beakers, funnel, filter paper,
retort stand, distilled water, conductivity probe, mortar & pestle, evaporating
basin.
A problem that arised when collecting
samples was the poor weather which made it difficult to collect soil samples. A
problem that arised when analysis of the samples was getting the equipment as
other members in the class also needed the equipment.
