Rivers Sample 2016 Paper 1, No 4 (b)

(b) Study Fig. 7, a diagram showing a waterfall and gorge.



 (i) The river is eroding by hydraulic action, corrasion (abrasion) and corrosion. Define each of these terms.

Hydraulic action ________________________________________
______________________________________________________
______________________________________________________
Corrasion (abrasion) _____________________________________
______________________________________________________
______________________________________________________

Corrosion _____________________________________________
______________________________________________________
___________________________________________________ [3]

(ii) Explain how the waterfall and gorge shown in Fig. 7 have been formed.
______________________________________________________
______________________________________________________
______________________________________________________
______________________________________________________
______________________________________________________
______________________________________________________
______________________________________________________
______________________________________________________
______________________________________________________
______________________________________________________

(c) Explain how an oxbow lake is formed. You should include fully labelled diagram(s).
______________________________________________________
______________________________________________________
______________________________________________________
______________________________________________________
______________________________________________________
______________________________________________________
______________________________________________________
______________________________________________________
______________________________________________________
______________________________________________________

______________________________________________________

______________________________________________________
______________________________________________________
___________________________________________________ [7]