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GCSE Geography · key term
The living organic material in an ecosystem; in a nutrient-cycle model, the biomass store contains nutrients held in living organisms.
Used by AQA, Edexcel and OCR
Specification 3.2.3.4 · Paper 2
Organic material, such as wood, crops or animal waste, used as a source of energy.
Revise: Strategies for Increasing Energy Supply and Fossil FuelsBiomass is different: replacement plants must grow to replenish the material used, so its renewability depends on how it is managed.
Specification 3.4, 3.7, 6.4, 6.5 · Paper 1, Paper 2
Distinguish renewable from pollution-free: biomass releases carbon dioxide when burned, and renewable installations can damage habitats.
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The rainforest nutrient cycle moves them between biomass, litter and soil.
Living organic matter. In a nutrient-cycle diagram, the biomass store represents nutrients held in living organisms.
Organic material, such as wood or crop material, used as an energy resource.
Organic material used as fuel. Traditional biomass includes wood, charcoal and crop waste.
Paper 3
The total mass of living organisms in an area; living organisms form one of an ecosystem’s nutrient stores.
Revise: Rainforest characteristicsA rainforest nutrient cycle has three main stores: biomass, the living organisms; litter, dead organic material; and soil.
Specification 4.2a · Paper 1, Paper 3
The living material in an ecosystem, including plants and animals; it is an important nutrient store.
Revise: Rainforest BiodiversityA rainforest's nutrient cycle moves them between three main stores: biomass, litter and soil. Biomass is living material; litter is dead material on the ground, such as fallen leaves.