📚 IGCSE WJEC Geography: Fieldwork and Practical Assessment Key Points | IGCSE WJEC 地理：实地考察与实践考核要点
Practical work in WJEC geography is not simply about collecting data; it is a staged enquiry that tests your ability to design, implement, analyse and evaluate a geographical investigation. This revision guide summarises the key assessment points for fieldwork and practical skills, from hypotheses to final conclusions.
WJEC 地理的实践工作不只是收集数据，而是一项分阶段进行的探究，考查你设计、实施、分析和评估地理调查的能力。本复习指南总结了实地考察与实践技能的关键考核要点，从提出假设到得出结论。
1. Understanding the Enquiry Process | 理解探究过程
Every WJEC practical investigation follows a logical sequence: identify a question, collect data, present data, analyse patterns, and then evaluate the whole enquiry. Examiners reward answers that recognise this sequence and use geographical terminology accurately.
每项 WJEC 实践调查都遵循一套逻辑顺序：确定问题、收集数据、展示数据、分析模式，然后评估整个探究过程。考官会奖励那些能够体现这一顺序并准确使用地理术语的答案。
The enquiry process can be remembered as “question, method, data, presentation, analysis, conclusion, evaluation”. You should be able to justify each stage rather than simply describe what was done.
探究过程可以记为 “问题、方法、数据、展示、分析、结论、评估”。你应该能够为每个阶段提供理由，而不只是描述做了什么。
2. Formulating Aims and Hypotheses | 制定目标与假设
An aim is a clear statement of what the enquiry sets out to achieve, for example: “To investigate how channel width changes downstream along the River Taff.” It should be specific and linked to a key geographical concept or theory.
目标是一句清晰陈述，说明调查要完成什么，例如：”调查 River Taff 下游河道宽度如何变化。” 目标应当具体，并与一个关键地理概念或理论相关联。
A hypothesis is a testable prediction, such as: “Channel width increases with distance downstream because discharge and erosion increase.” A null hypothesis states there is no relationship, and your data may either support or reject it.
假设是可检验的预测，例如：”河道宽度随下游距离增加而增大，因为流量和侵蚀增加。” 零假设则说明不存在关系，你的数据可以支持或拒绝它。
3. Choosing Locations and Sampling Strategies | 选择地点与抽样策略
Choosing appropriate sites is essential. Sampling reduces the amount of data you need while aiming to make the sample representative of the wider area. The three main strategies are random, systematic and stratified sampling.
选择合适的地点至关重要。抽样可以减少所需数据量，同时力求使样本代表更广泛的区域。三种主要策略是随机抽样、系统抽样和分层抽样。
Random sampling uses chance to avoid bias; systematic sampling collects data at regular intervals, such as every 10 metres along a transect; stratified sampling divides the study area into subgroups and samples proportionally from each. Be ready to justify why one method suits a river, beach or urban study.
随机抽样利用偶然性避免偏差；系统抽样按固定间隔收集数据，例如沿样线每 10 米采集一次；分层抽样将研究区划分为若干亚组，并按比例从每组中抽样。要准备好解释为什么某种方法适合河流、海滩或城市研究。
4. Primary and Secondary Data Collection | 一手与二手数据收集
Primary data are collected first-hand through fieldwork, such as measuring pebble size, recording land use or carrying out questionnaires. Secondary data come from existing sources, including maps, census data, weather records or published reports.
一手数据通过实地调查直接收集，例如测量卵石大小、记录土地利用或开展问卷调查。二手数据则来自已有来源，包括地图、人口普查数据、天气记录或已发表的报告。
Quantitative data are numerical and can be analysed statistically, while qualitative data are descriptive, such as photographs, opinions and land use classifications. WJEC questions often ask you to compare the strengths and weaknesses of primary versus secondary data.
定量数据是数值型数据，可以统计分析；定性数据则是描述性的，如照片、观点和土地利用分类。WJEC 题目经常要求你比较一手数据与二手数据的优缺点。
5. Fieldwork Techniques and Equipment | 实地调查技术与设备
Common physical geography techniques include measuring river velocity with a flowmeter, recording channel depth and width with a tape measure, and using a clinometer to measure slope angle. Beach studies may use callipers for pebble size and a ranging pole to record beach profiles.
常见的自然地理技术包括：用流速仪测量河流流速、用卷尺记录河道深度和宽度、用倾斜仪测量坡度角。海滩研究可能用卡尺测量卵石大小，用标杆记录海滩剖面。
Human geography techniques include questionnaires, pedestrian counts, land use mapping, environmental quality surveys and bipolar scoring. Always record units clearly and repeat measurements where possible to improve reliability.
人文地理技术包括问卷调查、行人计数、土地利用制图、环境质量调查和双向评分。务必清楚记录单位，并尽可能重复测量以提高可靠性。
6. Health, Safety and Ethical Considerations | 健康、安全与伦理考虑
Before fieldwork, you must complete a risk assessment that identifies hazards, who might be affected, existing controls and further actions. Hazards may include fast-flowing water, tides, traffic, uneven ground, poor weather or strangers during questionnaires.
实地调查前，你必须完成风险评估，识别危险、可能受影响的人群、现有控制措施和进一步行动。危险可能包括急流、潮汐、交通、地面不平、恶劣天气或问卷调查中的陌生人。
Ethical considerations include obtaining informed consent before interviews, respecting privacy, avoiding damage to fragile environments, and ensuring data are stored securely. WJEC marks can be awarded for explaining how you minimised risk and bias.
伦理考虑包括在访谈前获得知情同意、尊重隐私、避免破坏脆弱环境，以及确保数据安全存储。WJEC 可能会对解释你如何降低风险和偏差进行给分。
7. Data Presentation Skills | 数据展示技能
Choosing the correct presentation method is a common assessment point. Use line graphs for continuous data over distance or time, bar charts for categories, pie charts for proportions, scatter graphs for relationships, and histograms for frequency distributions.
选择正确的展示方法是常见考核点。连续数据随时间或距离变化时使用折线图；类别数据使用条形图；比例使用饼图；关系使用散点图；频率分布使用直方图。
Maps such as proportional symbol maps or choropleth maps show spatial patterns, while annotated photographs and field sketches record qualitative evidence. Always label axes, include units, add a title, and use a key where appropriate.
比例符号地图或等值区域图等地图可以显示空间模式，而标注照片和野外草图则记录定性证据。务必标注坐标轴、注明单位、加上标题，并在适当位置使用图例。
| Data type | Suitable presentation |
| River depth along a transect | Line graph or cross-section |
| Land use categories | Bar chart or pie chart |
| Relationship between velocity and load size | Scatter graph with best-fit line |
8. Analysing and Interpreting Results | 分析与解释结果
Analysis means identifying patterns, trends and anomalies rather than simply listing numbers. Use descriptive statistics such as mean, median, mode and range, and refer to interquartile range if you have spread data.
分析是指识别模式、趋势和异常值，而不仅仅是罗列数字。使用平均数、中位数、众数和极差等描述性统计量，如果数据有离散程度，可参考四分位距。
When describing a scatter graph, comment on direction, strength and outliers: for example, “there is a weak positive correlation between pebble size and distance from the cliff, but one anomalous result at 30 m breaks the trend.”
描述散点图时，要评论方向、强度和异常值，例如：”卵石大小与距悬崖距离之间存在弱正相关，但 30 米处有一个异常结果打破了这一趋势。”
Always link patterns back to geographical processes, such as attrition reducing pebble size, hydraulic action widening a channel, or urbanisation increasing pedestrian flow.
始终将模式与地理过程联系起来，例如磨蚀作用使卵石变小、水力作用使河道变宽，或城市化增加了行人流量。
9. Reaching Conclusions and Evaluating Limitations | 得出结论与评估局限性
A conclusion must directly answer the aim or accept/reject the hypothesis. Avoid vague statements; say whether the data support the hypothesis and quote example figures as evidence.
结论必须直接回答目标或接受/拒绝假设。避免含糊其辞；要说明数据是否支持假设，
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