Volcanicity — KCSE Geography

KCSE Geography · 50 practice questions · 4 syllabus objectives

8 easy25 medium17 hard

What You'll Learn

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

Define volcanicity and distinguish between intrusive and extrusive volcanic activity; describe the features formed by each

Describe the characteristics of the main types of volcanoes (shield, cinder cone, composite) and give examples from East Africa

Explain the positive and negative effects of volcanic activity on the physical and human environment

Volcanicity

Try 3 questions free. Sign up to access all 50 questions with full marking schemes.

easySHORT ANSWER3 marks

State three positive impacts of volcanic eruptions on the surrounding ecosystem. (3 marks)

View Marking Scheme

Part (a) — 3 marks

Volcanic ash enriches the soil with nutrients, promoting fertility (1 mk)

Formation of new land can create habitats for various species (1 mk)

Hot springs and geothermal activity can provide sources of energy (1 mk)

easySHORT ANSWER4 marks

Identify three characteristics of shield volcanoes and provide one example from East Africa. (4 marks)

View Marking Scheme

Part (a) — 3 marks

Broad, gently sloping sides (1 mk)

Low viscosity lava that flows easily (1 mk)

Typically non-explosive eruptions (1 mk)

Part (b) — 1 mark

Mount Longonot is an example of a shield volcano in East Africa (1 mk)

easySHORT ANSWER4 marks

State two main gases released during volcanic eruptions and explain their effects on the environment. (4 marks)

View Marking Scheme

Part (a) — 2 marks

Sulphur dioxide (1 mk)

Carbon dioxide (1 mk)

Part (b) — 2 marks

Sulphur dioxide can lead to acid rain, harming vegetation and water bodies (1 mk)

Carbon dioxide can contribute to global warming when released in large quantities (1 mk)

State three types of volcanic eruptions and provide one characteristic of each. (6 marks)