Lesson 6.2
6.2 Biological carbon sequestration Quiz: Pearson Edexcel Geography, Unit 8
20 questions
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Lesson 6.2, Biological carbon sequestration: 20 multiple choice questions for the Pearson Edexcel Geography (9GE0), Unit 8: Topic 6: The Carbon Cycle and Energy Security, written with Revision Ninja.
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The 20 questions
-
Marine phytoplankton sequester atmospheric carbon dioxide through which process?
- Outgassing
- Subduction
- Photosynthesis
- Respiration
-
Which oceanic process transfers carbon from organism shells into deep sea sediments?
- Carbonate pump
- Physical pump
- Solubility pump
- Thermal pump
-
Which global ocean current system transports deep carbon-rich water across the planet?
- Rip currents
- Surface gyres
- Equatorial countercurrent
- Thermohaline circulation
-
Which process allows land plants to fix carbon dioxide into biological biomass?
- Decomposition
- Transpiration
- Photosynthesis
- Respiration
-
Through which process do living organisms release carbon dioxide back into the atmosphere?
- Sedimentation
- Respiration
- Nitrification
- Photosynthesis
-
Where is most organic carbon stored within a terrestrial ecosystem?
- Soil organic matter
- Surface runoff
- Atmospheric canopy
- Bedrock layers
-
Over what timescale does microbial decomposition typically return carbon from plant litter to the atmosphere?
- Millions of years
- Several years
- Geological epochs
- Nanoseconds
-
Why is the biological carbon cycle classified as a fast carbon cycle?
- Subduction forces
- Geological storage
- Rock weathering
- Short transfer times
-
What term describes organisms like phytoplankton that absorb carbon at the ocean surface?
- Geological sink
- Lithospheric store
- Physical pump
- Biological pump
-
How does a phytoplankton bloom affect atmospheric carbon dioxide levels?
- Has no effect
- Doubles carbon levels
- Decreases atmospheric levels
- Increases atmospheric levels
-
Which process releases carbon stored in terrestrial biomass back into the atmosphere?
- Sedimentation
- Respiration
- Fossilisation
- Photosynthesis
-
Which process breaks down organic carbon in soils, releasing carbon dioxide?
- Chemical weathering
- Physical compaction
- Surface runoff
- Biological decomposition
-
How does thermohaline circulation contribute to long-term marine carbon storage?
- Surface water evaporation
- Deep water transport
- Atmospheric gas release
- Coastal wave erosion
-
Which organism acts as a consumer in the marine biological carbon pump?
- Kelp
- Seagrass
- Phytoplankton
- Zooplankton
-
A forest stores 300 t C per hectare in biomass and soil. A fire releases 80% of it. How much carbon is released per hectare?
- 240 t C
- 80 t C
- 380 t C
- 300 t C
-
How long can carbon remain stored in carbonate sediments compared to organic matter?
- Several months
- Millions of years
- A few decades
- Hundreds of days
-
Which factor directly reduces phytoplankton carbon dioxide absorption in surface waters?
- Higher water salinity
- Reduced sunlight
- Increased nutrient supply
- Cooler ocean temperatures
-
What process makes terrestrial biological carbon storage potentially temporary?
- Deep ocean subduction
- Volcanic eruption
- Tectonic uplift
- Decomposition and fire
-
Which process releases carbon from plants back into the atmosphere most rapidly?
- Biomass combustion
- Soil decomposition
- Plant respiration
- Fossil fuel formation
-
Which process is a key component of the fast carbon cycle?
- Rock weathering
- Sedimentation
- Photosynthesis
- Fossilisation
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