Your class is required to carry out a field study of a river.
i)What would be the advantage of dividing the class into groups according
to the stages of the long profile of a river?
ii)What would be the disadvantages of using secondary data in this kind of a field study?

i)
-The class will be able to study the entire course of the river.
-It will enable them to obtain detailed information on each stage of the river.
-It will save on time.
-It will enable the study to be carried out in an orderly way.
-It will encourage participation of all members of the class.
-It will facilitate interaction among the group members.

ii)
-Recorded data could be out of date.
-Conditions under which such data was collected may be changed.
-Obtaining records on the particular river which was collected may be difficult