Weathering — KCSE Geography

KCSE Geography · 37 practice questions · 4 syllabus objectives

11 easy12 medium14 hard

What You'll Learn

Key learning outcomes for this topic, aligned to the KNEC KCSE syllabus.

Define weathering and distinguish between mechanical, chemical and biological weathering; give examples of each type

Describe the process of chemical weathering: hydrolysis, carbonation, oxidation and hydration with examples of minerals affected

Explain the factors that influence the rate of weathering and describe the economic importance of weathered materials

Weathering

Sample Questions

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1
easySHORT ANSWER4 marks

Identify two economic uses of weathered materials and explain their significance in Kenya. (4 marks)

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Part (a) — 2 marks
Soil for agriculture (1 mk)
Construction materials (e.g., sand, gravel) (1 mk)
Part (b) — 2 marks
Fertile soils enhance crop yields, contributing to food security (1 mk)
Construction materials are essential for infrastructure development, boosting the economy (1 mk)
2
easySHORT ANSWER4 marks

Identify two factors that influence the rate of chemical weathering and explain how each factor affects this process. (4 marks)

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Part (a) — 2 marks
Temperature (1 mk)
Presence of water (1 mk)
Part (b) — 2 marks
Higher temperatures increase reaction rates in chemical weathering (1 mk)
Water is a solvent that facilitates chemical reactions, enhancing weathering (1 mk)
3
easySHORT ANSWER3 marks

Identify two minerals that undergo carbonation and state the main agent involved in this process. (3 marks)

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Part (a) — 2 marks
Calcite (1 mk)
Dolomite (1 mk)
Part (b) — 1 mark
Carbon dioxide (CO2) (1 mk)
4

Define mechanical weathering and provide two examples. (4 marks)

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Why Practise Weathering?

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