1. (ii) Briefly describe helicoidal flow. [3]
(a) (i) Define the terms velocity and discharge as they apply to river channels. [4]
(ii) Briefly describe helicoidal flow. [3]
(b) With the use of diagrams, describe and explain the formation of:
(i) waterfalls;
(ii) gorges. [8]
(c) To what extent can human activities affect river channels? [10]

2. (a) (i) Define the terms velocity and discharge as they apply to river channels. [4]
(ii) Briefly describe helicoidal flow.[3]
(b) With the use of diagrams, describe and explain the formation of:
(i) waterfalls;
(ii) gorges. [8]
(c) To what extent can human activities affect river channels? [10]

3. For one agricultural system (arable or pastoral) which you have studied,
(a) (i) name the system and locate your chosen example(s),
(ii) describe how physical factors affect agricultural land-use and practices in this system. [10]
(b) To what extent are recent changes to the system chosen in (a) the result of political factors? [15]

4. For one agricultural system (arable or pastoral) which you have studied,
(a) (i) name the system and locate your chosen example(s),
(ii) describe how physical factors affect agricultural land-use and practices in this system. [10]
(b) To what extent are recent changes to the system chosen in (a) the result of political factors? [15]