Secondary 3 Geography Practice Paper 2

Answer Key - Secondary 3 Geography Quiz: Map Graph Data Skills

Section A: Map Interpretation and Spatial Patterns

1. Definition: The arrangement or distribution of features/phenomena across a geographical area (1); it describes how things are spread out or grouped (1).
2. Pattern: Clustered (1). The HDB blocks are concentrated in one specific area rather than being spread evenly (1).
3. Difference: A cluster is a group of features concentrated closely together in one area (1.5); a linear pattern is where features are arranged in a line, often following a road, river, or coast (1.5).
4. Association: Positive spatial association (1). The presence of the road facilitates accessibility, which attracts the location of malls (1).
5. Symbols/Key: Symbols: Green shading, tree icons, or specific patterns (2). A consistent key ensures that all map users interpret the symbols identically, preventing ambiguity (1).
6. Calculation: $5\text{cm} \times 10,000 = 50,000\text{cm}$ (1). $50,000\text{cm} \div 100 = 500\text{m}$ (2).
7. Choropleth Map: Different shades of one colour are used to represent different ranges of population density (2). Darker shades usually represent higher density, while lighter shades represent lower density (1), allowing for quick visual identification of high-density regions (1).

Section B: Graph Analysis and Data Trends

8. Slope: A rapid increase in temperature over a short period of time (2).
9. Difference: A simple bar chart shows individual categories separately (1.5); a compound bar chart shows the total of a category while breaking it down into sub-components (1.5).
10. Calculation: $(90 / 360) \times 100 = 25\%$ (2).
11. Trend: There is a positive correlation/upward trend (1). Carbon emissions have increased consistently (1) over the 20-year period from 2000 to 2020 (1).
12. Suitability: Line graphs are designed to show continuous change over time (2). Sea level rise is a continuous process, and a line graph better illustrates the rate of change/slope (1).
13. Climograph: Temperature (plotted as a line on the y-axis/left) (2) and Rainfall (plotted as bars on the y-axis/right or shared) (2).
14. Negative Correlation: As the distance from the city centre increases (1), the land value decreases (1). This suggests that land closer to the central business district is more valuable/expensive (2).

Section C: Data Processing and Fieldwork Skills

15. Primary Data: Data collected first-hand by the researcher for a specific purpose (2). Example: Conducting a questionnaire survey or taking field measurements (1).
16. Sampling: Random sampling gives every member of the population an equal chance of being selected (2). Stratified sampling divides the population into subgroups (strata) and samples proportionally from each to ensure representation (2).
17. Mental Mapping: Mental maps capture subjective perceptions, emotions, and the "sense of place" (2), whereas checklists only capture objective, binary presence/absence of features (1). This provides deeper insight into how people feel about a place (1).
18. Categorization: Open-ended responses are qualitative and varied (1). Categorizing them into themes allows the researcher to quantify the data (e.g., "50% mentioned noise") and identify the most common opinions (2).
19. Limitation: Convenience sampling (e.g., surveying only people at one bus stop) may lead to biased results (1) because it does not represent the entire population's views (1), only those who happened to be there at that time (1).
20. Presentation: A grouped bar chart or a multiple-line graph (2). Justification: A grouped bar chart allows for easy comparison between the four corners at each specific time (2), or a line graph effectively shows the "peak" and "trough" trends of pedestrian flow across the three time intervals (2). (Max 5 marks).