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O Level Geography Physical Geography Quiz
Free O Level Geography Physical Geography quiz, Gemma31B Exam version, with questions, answers, and O Level-style practice for Singapore students.
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Questions
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Answers
Answer Key - O-Level Geography Quiz (Physical Geography)
1. Instrument Identification
- Accept: Barometer (pressure), Anemometer (wind speed), Rain gauge (rainfall), Hygrometer (humidity). [1]
2. Convection Currents
- Heat from the Earth's core/internal heat causing magma to rise and sink in the mantle. [1]
3. Plate Boundary
- Transform plate boundary. [1]
4. Ring of Fire Region
- Accept: Pacific Ocean basin / Western coast of the Americas / Eastern coast of Asia. [1]
5. Subduction
- The process where a denser tectonic plate (usually oceanic) sinks beneath a less dense plate (usually continental) into the mantle. [2]
6. Global Distribution
- Concentrated along plate boundaries (e.g., Pacific Ring of Fire, Alpine-Himalayan belt). [2]
- Linear patterns along mid-ocean ridges. [2]
7. Relationship
- Plate movements (collision, divergence, sliding) create stress/friction. [2]
- Rupture of this stress causes earthquakes; melting of crust creates magma for volcanoes. [2]
8. Oceanic-Continental Convergent Boundary
- Diagram (2m): Labels for Oceanic Plate, Continental Plate, Subduction Zone, Trench, Magma Chamber, Volcano.
- Explanation (3m): Denser oceanic plate sinks friction/heat melts crust magma rises to form volcanic arc on land.
9. Beach Formation
- Deposition of sediment (sand/shingle) by waves/currents in shallow water, accumulating above the high tide mark. [2]
10. Material and Slope
- Coarse material (shingle) high permeability less backwash steeper slope. [2]
- Fine material (sand) low permeability stronger backwash gentler slope. [1]
11. Weather and Profile
- Storms produce high-energy destructive waves strong swash/backwash removes sediment steeper profile. [2]
- Calm weather produces constructive waves deposition gentler profile. [1]
12. Wave-cut Platform Features
- Flat/gentle rocky area at the base of a cliff. [2]
- Presence of a wave-cut notch at the cliff base. [2]
13. Coastal Spit Formation
- Longshore drift transports sediment along the coast. [2]
- Coastline changes direction (e.g., at a river mouth). [1]
- Sediment continues to be deposited in the same direction, forming a narrow ridge of sand/shingle. [2]
14. Primary vs. Secondary Impacts
- Earthquake Primary: Ground shaking, building collapse, landslides. [3]
- Volcano Secondary: Ash clouds affecting aviation, acid rain, famine due to crop failure. [3]
15. Vulnerability Factors
- Economic: Lack of funds for earthquake-resistant buildings. [2]
- Governance: Poor land-use planning (building on slopes). [2]
- Education: Lack of public awareness/drills. [2]
16. Building Design Evaluation
- Strengths: Base isolators, cross-bracing reduce collapse risk. [3]
- Constraints: High cost of implementation in poor regions. [3]
- Conclusion: Effective but depends on economic capacity. [1]
17. Prediction Reliability
- Volcanoes: More reliable due to measurable precursors (seismic activity, gas emissions, ground swelling). [3]
- Earthquakes: Less reliable; occur suddenly with little to no warning. [3]
- Conclusion: Volcanic prediction is significantly more reliable. [1]
18. Volcanic Impacts Discussion
- Negative: Destruction of property, loss of life, respiratory issues from ash. [3]
- Positive: Fertile volcanic soils (rich in minerals), geothermal energy, tourism. [3]
- Conclusion: Not always negative; long-term benefits can outweigh short-term losses. [2]
19. International Cooperation
- Role: Providing financial aid for reconstruction, sharing early-warning technology. [4]
- Analysis: Essential for developing nations who lack internal resources. [4]
20. Land-use Planning Evaluation
- Agree: Zoning prevents building in high-risk areas (e.g., fault lines). [3]
- Counter: Cannot prevent the event itself; only reduces exposure. Other strategies like education/monitoring are needed. [3]
- Conclusion: Highly effective for risk reduction, but must be part of a holistic strategy. [2]