F3 GEO OPENER TERM 3 2026 MS

OPENER TERM 3 EXAMINATION 2026GEOGRAPHY FORM 3MARKING SCHEME

SECTION A (25 MARKS)

QUESTION 1

(a) Definition of Folding:

Folding is the process through which crustal rocks bend, warp, or flex upwards or downwards due to horizontal compressional forces within the Earth's crust. [2 marks]

(b) Fold Mountains found in the Northern Hemisphere:

• The Himalayas (Asia)• The Rockies / Rocky Mountains (North America)• The Alps (Europe)• The Urals / Ural Mountains (Europe/Asia)• The Atlas Mountains (North Africa) [Any 3 @ 1 mark = 3 marks]

QUESTION 2

(a) Countries through which the Great East African Rift Valley passes:

• Eritrea• Ethiopia• Kenya• Tanzania• Uganda• Rwanda• Burundi• Mozambique• Malawi [Any 4 @ 1 mark = 4 marks]

(b) Significance of faulting to the physical and human environment:

• Faulting leads to the formation of relief features like Rift Valleys, Escarpments, Fault Blocks (Horsts), and Tilt Blocks, which create scenic landscapes for tourism.• Faulting breaks up river channels leading to waterfalls and rapids, which are ideal sites for Hydro-Electric Power (HEP) generation.• Water bodies (Rift Valley lakes) formed in fault basins provide water for domestic/industrial use, irrigation, fishing, and transport.• Faulting exposes valuable minerals embedded deep within crustal rocks, facilitating mining activities.• Fault lines can act as pathways for spring water, mineral water, and geothermal steam, utilized for geothermal power production.• Fault scarps/escarpments create physical barriers to transport and communication line construction. [Any 3 @ 1 mark = 3 marks]

QUESTION 3

(a) Distinction between Magma and Lava:

• Magma is molten rock material found underneath/below the Earth's surface.• Lava is molten rock material (magma) that has erupted/reached the Earth's surface. [2 marks (Well-distinguished)]

(b) Reasons why melted rock material (magma) intrudes within crustal rocks instead of forcing its way to the surface: