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O Level Geography Fieldwork Quiz
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Questions
O-Level Geography Quiz - Fieldwork
Name: __________________________
Class: __________________________
Date: __________________________
Score: ________ / 40
Duration: 45 minutes
Total Marks: 40
Instructions:
- Answer all questions.
- Write your answers in the spaces provided.
- Marks are indicated in brackets [ ] at the end of each question or part question.
- You may use a calculator.
Section A: Planning and Methodology (Questions 1–5)
1. A group of students is investigating the hypothesis: "Water quality improves as distance increases from the urban centre of a river flowing through a city."
Identify two specific water quality variables they could measure to test this hypothesis.
[2]
(a) __________________________________________________________
(b) __________________________________________________________
2. The students decide to use systematic sampling to select their sites along the river.
Explain one advantage of using systematic sampling over random sampling for this specific investigation.
[2]
3. To measure water velocity, the students use the float method. They mark a 10-metre stretch of the river and time how long a floating object takes to travel this distance.
State one piece of equipment, other than a stopwatch, required for this method.
[1]
4. The students plan to measure river depth at three points across the channel (left bank, centre, right bank) at each site.
Suggest one reason why measuring depth at only the centre of the river might lead to inaccurate results for calculating cross-sectional area.
[2]
5. Before starting the fieldwork, the students conduct a risk assessment.
Identify one potential hazard associated with fieldwork in a river environment and suggest a corresponding safety precaution.
[2]
Hazard: __________________________________________________________
Precaution: ______________________________________________________
Section B: Data Collection and Processing (Questions 6–12)
6. The students collect data on pedestrian counts in the Central Business District (CBD) to test the hypothesis: "Pedestrian numbers are highest at the intersection of major roads."
Describe how the students should conduct a pedestrian count to ensure the data is reliable. Include details on timing and duration.
[3]
7. Table 1 shows the results of a environmental quality survey conducted at five sites (A–E) moving away from the city centre. Scores range from -3 (very poor) to +3 (very good).
| Site | Distance from Centre (km) | Environmental Quality Score |
|---|---|---|
| A | 0.5 | -2 |
| B | 1.0 | 0 |
| C | 2.5 | +1 |
| D | 4.0 | +2 |
| E | 6.0 | +3 |
Calculate the mean environmental quality score for all five sites. Show your working.
[2]
Working:
Answer: _______________
8. Refer to Table 1.
Describe the relationship between distance from the city centre and the environmental quality score.
[2]
9. The students wish to present the data from Table 1 on a graph.
Suggest the most appropriate type of graph to show the change in environmental quality score with distance.
[1]
10. When measuring wind speed using an anemometer, students are instructed to hold the instrument at head height.
Explain why it is important to keep the height of the anemometer consistent at all sites.
[2]
11. A student records the following wind speeds (m/s) at Site X: 4.2, 4.5, 12.0, 4.3, 4.4.
Identify the anomaly in this data set.
[1]
12. Suggest one reason why the anomaly identified in Question 11 might have occurred.
[1]
Section C: Analysis and Evaluation (Questions 13–20)
13. The students plotted their river velocity data on a scatter graph. The points are widely scattered with no clear line of best fit.
What does this suggest about the relationship between the variables tested?
[1]
14. Evaluate the reliability of using a simple float (e.g., an orange) to measure river velocity compared to using a flowmeter.
[3]
15. In a tourism survey, students ask tourists: "Do you like Singapore?"
Explain why this question might produce biased or unusable data.
[2]
16. Suggest an improved version of the question in Question 15 that would yield more useful quantitative data.
[2]
17. The students conclude that their hypothesis regarding water quality was supported. However, they only collected data on one day in July.
Explain why this limitation affects the validity of their conclusion.
[2]
18. To improve the study mentioned in Question 17, suggest one change to the data collection strategy regarding time.
[1]
19. When presenting data on land use changes in a neighbourhood, students use a pie chart.
State one disadvantage of using a pie chart for comparing land use changes over time (e.g., 2010 vs 2020).
[1]
20. A student argues that secondary data (e.g., government census records) is always more reliable than primary data collected by students.
To what extent do you agree with this statement? Justify your answer.
[4]
Answers
O-Level Geography Quiz - Fieldwork (Answer Key)
Total Marks: 40
Section A: Planning and Methodology
1. Identify two water quality variables. [2]
- Accept any two of: pH level, temperature, turbidity (clarity), dissolved oxygen, nitrate/phosphate levels.
- Marking: 1 mark for each correct variable.
2. Advantage of systematic sampling. [2]
- Answer: It ensures even coverage of the study area/river stretch [1], reducing the chance of bias that might occur if sites were chosen randomly or subjectively [1].
- Alternative: It is easier to organize and locate sites in the field compared to random coordinates [1+1].
3. Equipment for float method. [1]
- Answer: Measuring tape / Ruler / Range pole.
- Note: Stopwatch is excluded in the question.
4. Reason for measuring depth at multiple points. [2]
- Answer: River channels are rarely uniform; the centre is usually deepest while banks are shallower [1]. Measuring only the centre would overestimate the average depth and thus the cross-sectional area/discharge [1].
5. Hazard and Precaution. [2]
- Hazard: Slipping on wet rocks / Falling into deep water / Waterborne diseases. [1]
- Precaution: Wear sturdy footwear with grip / Wear life jackets or waders / Wash hands after fieldwork / Work in pairs. [1]
- Note: Precaution must match the hazard.
Section B: Data Collection and Processing
6. Conducting a pedestrian count. [3]
- Answer:
- Stand at a fixed point (e.g., corner of intersection) [1].
- Count every pedestrian passing a specific line or entering a zone [1].
- Conduct the count for a set duration (e.g., 15 minutes) at the same time of day/week to ensure comparability [1].
7. Calculate mean environmental quality score. [2]
- Working: Sum = (-2) + 0 + 1 + 2 + 3 = 4 [1].
Mean = 4 ÷ 5 = 0.8 [1]. - Answer: 0.8
8. Describe the relationship. [2]
- Answer: As the distance from the city centre increases [1], the environmental quality score improves (increases) [1].
- Note: Must mention both variables.
9. Appropriate graph type. [1]
- Answer: Line graph.
- Reasoning: Both variables (distance and score) are continuous/numerical, and we are showing a trend/change over distance.
10. Consistency of anemometer height. [2]
- Answer: Wind speed varies with height due to friction with the ground/obstacles [1]. Keeping height consistent ensures that differences in readings are due to location, not height variation, making the data comparable [1].
11. Identify the anomaly. [1]
- Answer: 12.0 m/s.
12. Reason for anomaly. [1]
- Accept any reasonable cause: A sudden gust of wind [1], the student stopped the stopwatch late [1], or the float got stuck and then released [1].
Section C: Analysis and Evaluation
13. Interpretation of scattered scatter graph. [1]
- Answer: There is no clear correlation (or weak/no relationship) between the variables [1].
14. Evaluate float method vs flowmeter. [3]
- Answer:
- Float Method: Less reliable/accurate because it measures surface velocity only, which is faster than average velocity [1]. It is also affected by wind and human reaction time [1].
- Flowmeter: More reliable as it measures actual water flow at specific depths and is digital/precise [1].
- Award marks for comparison: Float is cheaper/easier but less accurate; Flowmeter is accurate but expensive/complex.
15. Bias in "Do you like Singapore?" [2]
- Answer: It is a closed, subjective question that does not provide measurable data [1]. "Like" is vague and does not explain why or allow for statistical analysis of specific factors (e.g., cost, cleanliness) [1].
16. Improved question. [2]
- Answer: Use a Likert scale or rating system. E.g., "On a scale of 1–5, how satisfied are you with your visit to Singapore?" [1] OR "Which factor influenced your visit most? (Tick one)" [1].
- Note: Must yield quantitative or categorizable data.
17. Limitation of single-day data. [2]
- Answer: Weather conditions or river discharge can vary daily [1]. Data from one day may not be representative of typical conditions (e.g., it rained heavily that day, affecting water quality) [1].
18. Improvement to time strategy. [1]
- Answer: Collect data on multiple days / across different seasons / repeat the survey at different times of the day.
19. Disadvantage of pie chart for change over time. [1]
- Answer: It is difficult to compare two pie charts side-by-side to see small changes in proportions [1]. (Bar charts are better for comparison).
20. Secondary vs Primary data reliability. [4]
- Marking Rubric:
- Level 1 (1 mark): Simple statement agreeing or disagreeing without justification.
- Level 2 (2–3 marks): Identifies strengths/weaknesses of one or both types. E.g., Secondary data is collected by professionals with better equipment (reliable), but may be outdated. Primary data is specific to the hypothesis but prone to student error.
- Level 3 (4 marks): Balanced evaluation.
- Argument for Secondary: Large sample size, professional methodology, consistent standards [1].
- Argument against Secondary: May not match specific research question, may be old/outdated [1].
- Argument for Primary: Tailored to hypothesis, current data [1].
- Conclusion: Secondary is often more reliable for broad trends, but primary is necessary for specific local investigations if conducted rigorously. Validity depends on the source and method [1].