Lesson 5.7.1
5.7.1 Controversial conclusions, carbon cycle and sustainable resources Quiz: Pearson Edexcel Biology, Unit 5
20 questions
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Lesson 5.7.1, Controversial conclusions, carbon cycle and sustainable resources: 20 multiple choice questions for the Pearson Edexcel Biology (9BI0), Unit 5: On the Wild Side, written with Revision Ninja.
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The 20 questions
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Which biological process removes carbon dioxide from the atmosphere?
- Decomposition
- Combustion
- Photosynthesis
- Aerobic respiration
-
Which process directly releases carbon dioxide into the atmosphere from living cells?
- Photosynthesis
- Aerobic respiration
- Carbon fixation
- Nitrification
-
How does reforestation help to reduce atmospheric carbon dioxide levels?
- Reduced biomass accumulation
- Enhanced fossil combustion
- Photosynthetic carbon storage
- Increased soil erosion
-
Why are biofuels considered more carbon-neutral than fossil fuels?
- Infinite land availability
- Zero carbon emissions
- Recent carbon fixation
- Higher energy density
-
What is a major criticism of biofuel production?
- Enhanced soil fertility
- Food crop displacement
- Increased fossil combustion
- Reduced atmospheric nitrogen
-
Why must scientists extrapolate when predicting future climate change?
- Exceeding measured data
- Using unmeasured variables
- Ignoring historical trends
- Measuring current emissions
-
What is a key limitation of climate models?
- Zero predictive uncertainty
- High computing costs
- Reliance on assumptions
- Excessive data collection
-
Why might different scientists draw varying conclusions from identical climate data?
- Flawed mathematical formulas
- Universal scientific agreement
- Identical personal values
- Subjective evidence interpretation
-
What is the main purpose of the peer review process in science?
- Evaluating study validity
- Funding research projects
- Guaranteeing absolute truth
- Promoting public relations
-
If photosynthesis absorbs 100 carbon units and respiration releases 85 units, what is the net change?
- 15 units removed
- 15 units added
- 85 units added
- 185 units removed
-
How do biofuels fit into the modern carbon cycle?
- Short-term carbon cycling
- Complete cycle isolation
- Permanent carbon storage
- Long-term fossil formation
-
What competing interests are balanced when sustainably harvesting timber in conservation areas?
- Maximum profit
- Human needs
- Unrestricted logging
- Total preservation
-
Which practice helps resolve conflict between human needs and forest conservation?
- Clear-cutting
- Monoculture farming
- Deforestation
- Reforestation
-
What term describes biofuels where carbon released during combustion equals carbon absorbed during growth?
- Carbon neutral
- Carbon intensive
- Carbon negative
- Net emitting
-
Which process do decomposers perform to return carbon dioxide to the atmosphere?
- Carbon fixation
- Combustion
- Microbial respiration
- Photosynthesis
-
What main factor limits the certainty of future climate projections?
- Constant emissions
- Unproven assumptions
- Zero historical data
- Lack of computers
-
What is a major ecological benefit of replanting degraded land with native trees?
- Decreased biodiversity
- Increased carbon storage
- Reduced soil nitrate
- Higher erosion rate
-
Why can scientific conclusions on climate policy vary between different researchers?
- Subjective value judgments
- Fixed physical laws
- Identical data sets
- Flawless predictive models
-
Which human activity causes the most rapid increase in atmospheric carbon dioxide concentration?
- Fossil fuel combustion
- Deep ocean storage
- Reforestation
- Sustainable farming
-
Why is atmospheric carbon dioxide concentration currently increasing globally?
- Photosynthesis has stopped
- Absorption exceeds emissions
- Emissions exceed absorption
- Oceans release nitrogen
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