(i) Draw a well-labeled diagram of a waterfall and explain its formation.
(The diagram is taken from pg. 126 of your textbook)
A waterfall can develop where there is a band of harder rock overlying softer rocks. The river is able to wear away the softer rock more quickly than the hard rock. As a result, a step is formed where the soft rock used to be and water falls over the step. (pg. 126)
(ii) Define the term 'drainage basin'.
A drainage basin is the area which is drained by water running across the surface of the land into a particular set of channels. (pg. 123)
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