ZIMSEC O-Level Geography
7.3Ecosystems
Overview
Topic 3 of the scope and sequence: components and interdependence (Form 1), biodiversity, biomes and sustainable management (Form 2), cycles, wetlands, conservation and benefits (Form 3), soils (Form 4).
In this topic
- 7.3.1 Components of ecosystems, micro-ecosystems and interdependence
- 7.3.2 Biodiversity, benefits of ecosystems and ecosystems in entrepreneurship
- 7.3.3 Tropical ecosystems (biomes)
- 7.3.4 Sustainable management, conservation and restoration of ecosystems
- 7.3.5 Biogeochemical cycles
- 7.3.6 Wetlands
- 7.3.7 Soils
Lessons
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Ecosystems: components, food chains and food webs
30 min
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Biodiversity and the value of ecosystems
30 min
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Savanna and hot desert biomes
32 min
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The tropical rainforest ecosystem
32 min
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Conserving and restoring ecosystems
32 min
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Nutrient, nitrogen and carbon cycles
30 min
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Wetlands: types, benefits, threats and protection
28 min
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Soils: components, properties, formation and profiles
32 min
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Sample question
A sample question on this topic. Answer it, check it, then read the worked answer.
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