Study carefully the experimental set-ups below and use them to answe the following questions;

(a) What is the aim of the experiment for which the apparatus has been set-up?

(b) List the experimental set-ups in the order which as risen through the soil samples, startin with the highest.

(C) List six items of apparatus used in the experimental set-up

(d) Describe briefly the procedure used in setting up the experiment. 

(e) Why is there a difference in the set. in the water levels of the soil  samples in the set ups labelled B and C