Lesson 3.1.6.2
3.1.6.2 Ecosystems and processes Quiz: AQA Geography, Unit 1
20 questions
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Lesson 3.1.6.2, Ecosystems and processes: 20 multiple choice questions for the AQA Geography (7037), Unit 1: Physical geography, written with Revision Ninja.
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The 20 questions
-
What term describes organisms that synthesize organic matter from inorganic sources through photosynthesis?
- Secondary consumers
- Primary consumers
- Primary producers
- Decomposers
-
What term describes the specific feeding position an organism occupies within a food chain?
- Trophic level
- Biome rank
- Ecological niche
- Seral stage
-
What percentage of energy is typically transferred from one trophic level to the next?
- 50 per cent
- 90 per cent
- 10 per cent
- 1 per cent
-
What term describes the total mass of living organic matter in a given area?
- Net primary production
- Gross primary production
- Abiotic mass
- Biomass
-
How is net primary production calculated from gross primary production?
- Subtract respiratory losses
- Add solar input
- Multiply by biomass
- Divide by decomposition
-
Which of the following system components represents an ecosystem store?
- Biomass
- Precipitation
- Leaching
- Photosynthesis
-
Which of the following system components is an ecosystem transfer?
- Leaf litter
- Plant biomass
- Decomposition
- Soil nutrients
-
What term describes the sequence of ecological change over time towards a stable community?
- Succession
- Zonation
- Stratification
- Plagioclimax
-
What is an individual intermediate stage in an ecological succession sequence called?
- A pioneer species
- A climax community
- A seral stage
- A plagioclimax
-
What term describes the final stable plant community determined mainly by regional climate?
- Climatic climax
- Sub-climax
- Pioneer community
- Plagioclimax
-
What term describes a stable plant community maintained permanently by human activity?
- Sub-climax
- Climatic climax
- Primary succession
- Plagioclimax
-
Which process transfers mineral nutrients directly from leaf litter into the soil store?
- Weathering
- Leaching
- Decomposition
- Surface runoff
-
What is the primary source of energy input into most terrestrial ecosystems?
- Geothermal heat
- Latent heat
- Soil minerals
- Solar radiation
-
Which factor primarily controls the global distribution and structure of terrestrial biomes?
- Soil pH
- Rock geology
- Climate
- Topography
-
How does global climate change primarily alter the distribution of terrestrial biomes?
- Prevents plant succession
- Shifts ecosystem boundaries
- Increases soil depth
- Stops nutrient cycling
-
Which of the following represents an input of material into a terrestrial ecosystem?
- Respiration
- Biomass accumulation
- Precipitation
- Soil leaching
-
Why does a mature woodland store substantially more biomass than a young woodland?
- Increased soil erosion
- Faster leaf decay
- Higher solar radiation
- Organic matter accumulation
-
Which factor can interrupt plant succession and prevent an ecosystem reaching climatic climax?
- Nutrient recycling
- Human disturbance
- High rainfall
- Solar radiation
-
If gross primary production is 500 units and respiration is 200 units, calculate net primary production.
- 300 units
- 250 units
- 700 units
- 1000 units
-
Which process absorbs inorganic atmospheric carbon dioxide into plant biomass within an ecosystem?
- Combustion
- Respiration
- Decomposition
- Photosynthesis
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