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Describe soil formation, its components, mass wasting, and its effects on humans.
Geography
ScanSolve AI Answer
- b) Two processes of soil formation are:
- Weathering: The physical and chemical breakdown of parent rock material into smaller particles.
- Decomposition: The breakdown of organic matter (dead plants and animals) by microorganisms, forming humus.
- c) Two components of the soil are:
- Mineral matter: This consists of weathered rock particles of various sizes (sand, silt, clay) that provide nutrients and structure to the soil.
- Organic matter (Humus): This is decomposed plant and animal material, which improves soil fertility, water retention, and aeration.
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d) Mass wasting is the downslope movement of rock, soil, and debris under the direct influence of gravity.
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e) Two types of mass wasting are:
- Landslides: Rapid movement of a mass of rock, earth, or debris down a slope. They often occur on steep slopes and can be triggered by heavy rainfall or earthquakes.
- Creep: The very slow, gradual downslope movement of soil and rock particles. It is often imperceptible but can be observed over time through tilted fences or trees.
- f) Three effects of mass wasting on humans are:
- Loss of life and injury: Rapid mass wasting events like landslides can bury or sweep away people, leading to fatalities and severe injuries.
- Destruction of infrastructure: Roads, buildings, bridges, and agricultural land can be damaged or destroyed, disrupting transportation, housing, and food production.
- Economic losses: Recovery efforts are costly, and the loss of property, agricultural yields, and infrastructure can lead to significant economic setbacks for individuals and communities.
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