Secondary 3 Geography Practice Paper 2

TuitionGoWhere Practice Paper - Geography Secondary 3

Answer Key and Marking Scheme (Version 2)

Subject: Geography
Level: Secondary 3
Topic: Map, Graph, and Data Skills

Section A: Map Skills and Spatial Analysis

1. Calculate the actual ground distance in kilometres between Point A and Point B.

• Working:
  • Map Distance = 4 cm
  • Scale = 1:25,000
  • Actual Distance (cm) = 4 cm × 25,000 = 100,000 cm
  • Convert to km: 100,000 ÷ 100,000 = 1 km
• Answer: 1 km
• Marks: [2] (1 mark for correct calculation/working, 1 mark for correct unit and value)

2. Describe the relief characteristics of the area surrounding Point B.

• Answer:
  • Point B is at a higher elevation (50m) compared to Point A (20m).
  • The contour lines are likely closer together near Point B if it is a slope, indicating steeper terrain, or it represents a hill/ridge. Given the elevation rise over a short distance, it is likely a slope or hill.
• Marks: [2] (1 mark for identifying higher elevation, 1 mark for inferring slope/steepness or hill feature)

3. Explain why Grid Ref 123456 (Point A) might be a more suitable location for a weather station than a steep slope near Point B.

• Answer:
  • Accessibility: Point A is at a lower elevation and likely flatter terrain, making it easier and safer for students to access regularly to read instruments.
  • Safety/Stability: Steep slopes (Point B) pose safety risks and may have unstable ground, making it difficult to secure equipment.
• Marks: [2] (1 mark for accessibility/flatness, 1 mark for safety/stability)

4. Define the term scale in the context of geographical maps.

• Answer: Scale is the ratio between the distance on the map and the corresponding actual distance on the ground.
• Marks: [1]

5. If the map scale was changed from 1:25,000 to 1:50,000, would the map show more or less detail? Explain.

• Answer:
  • It would show less detail.
  • Explanation: A 1:50,000 scale is a "smaller" scale (covers a larger area per unit of map space) compared to 1:25,000. Therefore, features must be generalized or omitted to fit the same map size, resulting in less detail.
• Marks: [3] (1 mark for "less detail", 2 marks for explanation linking scale ratio to area coverage/generalization)

Section B: Graph Interpretation and Climate Data

6. Calculate the annual temperature range for City X.

• Working:
  • Highest Temp: 29°C (Apr/May)
  • Lowest Temp: 27°C (Jan/Jul/Aug/Sep/Oct/Nov/Dec)
  • Range = 29 - 27 = 2°C
• Answer: 2°C
• Marks: [1]

7. Calculate the total annual rainfall for City X.

• Working:
  • Sum = 250+200+180+160+140+120+100+110+130+180+220+260
  • Sum = 2050 mm
• Answer: 2050 mm
• Marks: [2] (1 mark for working/attempt, 1 mark for correct answer)

8. Describe the rainfall pattern of City X throughout the year.

• Answer:
  • Rainfall is high throughout the year (no dry month below 100mm).
  • There is a slight dip in the middle of the year (June/July) with the lowest rainfall in July (100mm).
  • Rainfall peaks at the beginning and end of the year (Jan/Dec > 250mm).
  • Overall, it is evenly distributed but with a bimodal tendency or slight mid-year minimum.
• Marks: [4] (1 mark for "high year-round", 1 mark for identifying mid-year dip, 1 mark for identifying peaks, 1 mark for overall characterization e.g., "no distinct dry season")

9. Identify the likely climate type of City X and give one reason.

• Answer:
  • Type: Equatorial / Tropical Rainforest Climate.
  • Reason: High annual rainfall (>2000mm) and low annual temperature range (<2°C), with temperatures consistently high (>25°C).
• Marks: [2] (1 mark for correct climate type, 1 mark for valid reason linked to data)

10. Describe the trend in tourist arrivals between 2010 and 2019.

• Answer:
  • There was a steady/consistent increase in tourist arrivals.
  • Arrivals grew from 1 million to 5 million over the 9-year period.
• Marks: [2] (1 mark for direction of trend "increase", 1 mark for referencing data magnitude)

11. Suggest one possible geographical or global event that could explain the sharp drop in 2020.

• Answer:
  • The COVID-19 Pandemic / Global Health Crisis leading to travel restrictions.
• Marks: [1]

12. Explain why line graphs are suitable for displaying data over time.

• Answer:
  • Line graphs clearly show trends and changes over a continuous period.
  • They allow for easy visualization of increases, decreases, or fluctuations between data points.
• Marks: [2] (1 mark for mentioning trends/changes, 1 mark for continuity/visualization)

Section C: Statistical Analysis and Fieldwork Data

13. Which zone has the highest environmental quality?

• Answer: Zone B (Residential)
• Marks: [1]

14. Calculate the mean EQS score for all three zones combined.

• Working:
  • Sum of scores = 18 + 22 + 12 = 52
  • Number of zones = 3
  • Mean = 52 / 3 = 17.33
• Answer: 17.3 (or 17.33)
• Marks: [2] (1 mark for working, 1 mark for correct answer)

15. Describe three essential features for a correct bar chart.

• Answer:
  1. Title: A clear title describing the data (e.g., "Car Counts in Different Zones").
  2. Labels: Both x-axis (Zones) and y-axis (Number of Cars) must be labeled with units.
  3. Scale: The y-axis must have a consistent and appropriate numerical scale.
  • (Alternative: Bars must be of equal width and separated by gaps).
• Marks: [3] (1 mark per valid feature)

16. Explain why random sampling might be difficult in the CBD (Zone A).

• Answer:
  • The CBD has very high pedestrian traffic and congestion, making it physically difficult to stop people randomly or access certain spots safely.
  • Time constraints may force students to use convenience sampling (whoever is nearest) rather than true random selection.
• Marks: [2] (1 mark for identifying difficulty e.g., congestion/safety, 1 mark for linking to sampling method compromise)

17. Explain how calculating the range helps understand variation in Zone C.

• Answer:
  • The mean only gives the average, hiding extreme values.
  • The range (Highest Score - Lowest Score) shows the spread or disparity in environmental quality within the zone. A large range indicates inconsistency (some areas very good, some very bad), which the mean might mask.
• Marks: [2] (1 mark for defining range/spread, 1 mark for explaining why it reveals inconsistency/variation)

18. Identify one potential source of human error in collecting EQS data.

• Answer:
  • Subjectivity/Bias: Different students may interpret "litter" or "noise" differently (e.g., one student thinks 3 cars is noisy, another thinks it is quiet).
• Marks: [1]

19. Suggest one way to improve the reliability of the EQS data.

• Answer:
  • Repeat surveys: Conduct the survey at different times of the day or on different days and calculate an average.
  • Multiple observers: Have multiple students score the same location and average their scores to reduce individual bias.
• Marks: [2] (1 mark for strategy, 1 mark for explanation of how it improves reliability)

20. Conclude: Is there a clear relationship between land use and environmental quality? Justify.

• Answer:
  • Yes/Partially: There is a relationship.
  • Justification: The Residential zone (B) has the highest score (22), suggesting quieter, cleaner environments. The Industrial zone (C) has the lowest (12), likely due to pollution/litter. The CBD (A) is intermediate (18), possibly due to high maintenance but also high traffic. The data supports the hypothesis that land use influences environmental quality.
• Marks: [3] (1 mark for conclusion, 2 marks for justification using specific data comparisons from Table 1)