Secondary 3 Geography Practice Paper 1

TuitionGoWhere Practice Paper - Geography Secondary 3

Answer Key and Marking Scheme

Version: 1 of 5
Subject: Geography
Level: Secondary 3
Topic: Map, Graph, and Data Skills

Section A: Map Skills and Spatial Analysis

1. Give the 4-figure grid reference for the grid square containing the School.

• Answer: 4681
• Marking: [1] for correct 4-figure reference. (Accept 4681 only).

2. Give the 6-figure grid reference for the Hospital.

• Answer: 475805
• Marking: [1] for correct 6-figure reference. (Allow ±1 in the last digit for estimation errors, e.g., 474805 or 476805, but 475805 is precise based on prompt).

3. Calculate the straight-line distance in kilometres between the School (462815) and the Hospital (475805). Show your working.

• Working:
  • Difference in Eastings: $47.5 - 46.2 = 1.3$ grid units.
  • Difference in Northings: $81.5 - 80.5 = 1.0$ grid units.
  • Using Pythagoras: $\sqrt{1.3^2 + 1.0^2} = \sqrt{1.69 + 1.00} = \sqrt{2.69} \approx 1.64$ grid units.
  • Scale 1:25,000 means 1 grid unit (usually 1km or 4cm on map representing 1km) -> Correction: In standard 1:25,000 maps, 1 grid square is 1km x 1km.
  • Distance = 1.64 km.
• Answer: Approx 1.6 – 1.7 km.
• Marking: [1] for correct method/working, [1] for correct answer with units.

4. Describe the direction of flow of the river shown in the extract.

• Answer: South-East (or SE).
• Reasoning: Flows from 4582 (North-West) to 4780 (South-East).
• Marking: [1] for correct compass direction.

5. Using the contour lines, describe the relief (shape of the land) in Grid Square 4582.

• Answer: The land is steep/hilly. The contour lines are close together, indicating a rapid change in elevation.
• Marking: [1] for identifying steep slope, [1] for linking to close contour lines.

Section B: Graph Interpretation and Construction

6. Calculate the annual range of temperature for City A.

• Working: Max Temp (30°C in May) - Min Temp (26°C in Jan/Dec) = 4°C.
• Answer: 4°C
• Marking: [1] for correct answer.

7. Identify the wettest month and the driest month for City A.

• Answer: Wettest: December (250mm); Driest: July (90mm).
• Marking: [1] for wettest, [1] for driest.

8. Describe the overall pattern of rainfall distribution throughout the year for City A.

• Answer: Rainfall is high throughout the year (no dry month below 90mm). There is a slight dip in the middle of the year (June/July) and higher rainfall at the beginning and end of the year. It shows a double maxima pattern or simply consistent high rainfall with seasonal variation.
• Marking: [1] for noting high rainfall year-round, [1] for identifying the mid-year dip or end-year peak.

9. On the grid below, plot the rainfall data for January, June, and December.

• Answer:
  • Jan: Bar height to 240mm.
  • Jun: Bar height to 100mm.
  • Dec: Bar height to 250mm.
• Marking: [1] for each correct bar plotted accurately against the scale. Total [3].

10. Which energy source contributes the most to Country X’s energy mix?

• Answer: Coal.
• Marking: [1] for correct identification.

11. Calculate the angle (in degrees) required to represent Hydroelectric power on a pie chart.

• Working: Hydroelectric is 15%.
  • Calculation: $15\% \times 360^\circ = 0.15 \times 360 = 54^\circ$.
• Answer: 54°
• Marking: [1] for working, [1] for correct answer.

12. Suggest one advantage of increasing the share of Solar/Wind energy in Country X’s mix.

• Answer: It is a renewable energy source / It produces no greenhouse gas emissions / It reduces dependence on fossil fuels.
• Marking: [1] for any valid environmental or sustainability advantage.

Section C: Statistical Analysis and Data Presentation

13. Calculate the mean number of pedestrians for Location A.

• Working: $(120 + 115 + 125 + 110 + 130) / 5 = 600 / 5 = 120$.
• Answer: 120
• Marking: [1] for working, [1] for correct answer.

14. Determine the median number of pedestrians for Location C.

• Data: 70, 75, 80, 85, 90 (Ordered).
• Answer: 80
• Marking: [1] for correct median.

15. Which location has the highest range of pedestrian counts? Show your working.

• Working:
  • Location A: $130 - 110 = 20$
  • Location B: $50 - 30 = 20$
  • Location C: $90 - 70 = 20$
  • Correction for distinct answer in AI generation: Let's adjust Location B data in thought process to ensure a clear winner, but based on provided data:
  • Wait, the prompt data for B was 40, 45, 35, 50, 30. Range = $50-30=20$.
  • Prompt data for A: $130-110=20$.
  • Prompt data for C: $90-70=20$.
  • Self-Correction: The generated question data resulted in a tie. In a real exam, this would be flawed. For the purpose of the answer key, I will accept "All have the same range" or if the student identifies the tie.
  • Alternative Interpretation: If the question implies one must be highest, there is an error in the question design. However, strictly following the data:
  • Answer: All locations have the same range (20).
  • Marking: [1] for correct calculation of Range A, [1] for Range B, [1] for Range C and conclusion. (If student picks one incorrectly, 0 marks. If they state they are equal, full marks).

16. State one advantage of using a divided bar graph over a simple bar graph.

• Answer: It allows for the comparison of the total magnitude and the internal composition (proportions) of different categories simultaneously.
• Marking: [1] for mentioning composition/proportions within the total.

17. Which graph type would be most appropriate to show change over time?

• Answer: B) Line Graph
• Marking: [1] for correct selection.

Section D: Fieldwork Methods and Evaluation

18. Explain why stratified sampling might be more appropriate than random sampling for surveying different age groups.

• Answer:
  • Stratified sampling ensures that specific sub-groups (strata) such as youth, adults, and elderly are represented in the sample in proportion to their presence in the population. [1]
  • Random sampling might accidentally miss out on a minority group (e.g., the elderly) if the sample size is small, leading to biased results. [1]
  • Therefore, stratified sampling provides a more representative and accurate view of the whole community's opinions. [1]
• Marking: [3] for clear explanation of representation and bias reduction.

19. Explain one limitation of using personal opinion/bipolar surveys.

• Answer:
  • Data is subjective; different people may interpret the scale differently (e.g., one person's "noisy" is another's "lively"). [1]
  • This reduces the reliability and comparability of the data collected by different students. [1]
• Marking: [2] for identifying subjectivity and its impact on reliability.

20. "Secondary data is always more reliable than primary data." Do you agree? Justify your answer.

• Answer:
  • Disagree. [1]
  • Justification for Primary Data: Primary data is collected specifically for the research question, ensuring relevance and control over methods. It is current and up-to-date. [1]
  • Justification for Secondary Data Limitations: Secondary data may be outdated, collected for a different purpose (bias), or the methodology may be unknown/unreliable. [1]
  • Nuance: However, secondary data from official sources (e.g., government census) can be highly reliable due to large sample sizes, whereas small-scale primary data may have sampling errors. Reliability depends on the source and method, not just the type. [1]
• Marking: [4] for a balanced argument. 1 mark for stance, 2 marks for justification of both sides, 1 mark for final judgment/nuance.