1. Imagine you are doing a series of laboratory experiments with a sample of a clay soil and a sample of a sandy soil.
   How would you expect the two soils to compare for the following properties?
   
   (a) Organic matter
   (b) Bulk density
   (c) Particle density
   (d) Porosity
   (e) Level of nutrients or minerals held in the soil
   (f) Moisture storage
   (g) Rate of water movement through the soil.
   
   For example, might you expect the sandy soil to have a greater bulk density than
   the clay soil?
   
   
   
2.  Select a soil order from Table 10.4 in Physical Geography.
   Draw and describe a representative profile of a soil in that order, explaining the chief characteristics. Comment on problems associated with using soils belonging to the order.
   
   
   
3. A major concern about the practice of burying waste in the ground (in landfill sites)
   is the potential for the contamination of the land and groundwater. Further
   concerns arise when former landfill sites, or other such brownfield areas, are then         used for purposes such as recreational use or housing.
   (a) Draw a diagram to show how land and groundwater can become contaminated
        in landfill areas.

(b) Draw a list of the advantages and disadvantage of disposing of waste in this      way compared to incineration or other disposal methods.

(c) Summarize what may be the impacts on health from the development of      brownfield land and what the relative risks are.