11. The original landmass, pangola split into
A. Laurissa in the north and Gondwanaland in the south
B. Laurissa in the south and Gondwanaland in the north
C. Laurissa in the east and Gondwanaland in the west
D. Laurissa in the west and Gondwanaland in the east
12. The R-horizon of soil horizon consists of
A. Unweathered bedrock
B. Weathered parent material
C. Plant litter at various levels of decomposition
D. None of the above
13. The propagation of radio signals is greatly influenced by
A. Troposphere
B. Ionosphere
C. Exosphere
D. Thermosphere
14. The pyramidal peaks that form when several cirques chisel a mountain form three more sides are called
A. Horns
B. Cirques
C. Aretes
D. Medial moraines
15. The process that involves the eroded material being dissolved and carried along in water as individual ions is called
A. Solution
B. Suspension
C. Saltation
D. Traction