NCERT Class 12 Geography Practical Work in Geography Part II: Chapter 1 — Data and its Sources
This chapter introduces the concept of data in Geography, explaining what data is and why it is essential for analysis. Data are defined as measurements from the real world, with 'datum' being a single measurement. The chapter highlights the need for data in understanding geographical phenomena, such as population distribution, crop production, and urban growth, emphasizing the role of statistical analysis. It cautions against statistical fallacies, like using average depth to judge river safety, stressing the importance of proper data presentation. The text then introduces the two primary sources of data collection: primary sources, where data is collected for the first time by an individual or organization, and secondary sources, which involve using published or unpublished data. Personal observation is detailed as a method for collecting primary data in the field. This chapter lays the foundation for understanding geographical data and its collection methods, crucial for CBSE Class 12 students.
Quick info
| Board | CBSE / NCERT |
|---|---|
| Class | Class 12 |
| Subject | Geography |
| Book | Practical Work in Geography Part II |
| Chapter | Chapter 1 — Data and its Sources |
| Language | English |
| PDF type | NCERT Textbook |
| Session | CBSE 2026 |
| Reading time | 4 minutes |
| Word count | 725 |
Learning outcomes
- Define data and datum in the context of geography.
- Explain the importance and need for data in geographical analysis.
- Understand the concept of statistical fallacy with an example.
- Differentiate between primary and secondary sources of data.
- Identify personal observation as a method for primary data collection.
Vocabulary
| Word | Meaning |
|---|---|
| Data | Numbers that represent measurements from the real world. |
| Datum | A single measurement. |
| Information | A meaningful answer to a query or a meaningful stimulus that can cascade into further queries. |
| Statistical Fallacy | A misleading conclusion drawn from data, often due to improper analysis or presentation. |
| Primary Sources | Data collected for the first time by an individual, group, institution, or organization. |
| Secondary Sources | Data collected from any published or unpublished sources. |
| Personal Observations | Collection of information through direct observation in the field. |
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Practice questions
- What is the definition of data? Answer: Data are defined as numbers that represent measurements from the real world.
- What is a datum? Answer: A datum is a single measurement.
- Why is data important in geographical analysis? Answer: Data is important for understanding the distribution, growth, and interrelationships of geographical phenomena, which are often best explained in quantitative terms.
- What are the two main sources of data? Answer: The two main sources of data are primary sources and secondary sources.
- Give an example of primary data collection through personal observation. Answer: Collecting information about relief features, soil types, or population structure through a field survey.
Practice MCQs
Q1. What is a single measurement from the real world called?
Explanation: Datum refers to a single measurement, while data is a collection of such measurements.
Q2. Which of the following is an example of statistical fallacy mentioned in the text?
Explanation: The story of the child drowning despite the average depth being safe illustrates a statistical fallacy where an average misrepresents the reality.
Q3. Data collected for the first time by an individual or organization is known as:
Explanation: Primary sources involve the initial collection of data by the researcher or entity.
Q4. Which method involves collecting information through direct observation in the field?
Explanation: Personal observations are a direct method of collecting primary data by observing phenomena in their natural setting.
Q5. Information is defined as:
Explanation: Information is derived from data and provides meaning or leads to further inquiry.
Frequently asked questions
What is the difference between data and information?
Data refers to raw numbers or measurements from the real world, while information is data that has been processed to provide a meaningful answer or stimulus.
Why is data important for studying geography?
Data is crucial for geographical analysis as it helps in understanding the distribution, growth, and interrelationships of phenomena, which are often best explained quantitatively.
What is a statistical fallacy?
A statistical fallacy is a misleading conclusion drawn from data, often due to improper analysis or presentation, as illustrated by the example of average river depth.
What are the two main categories of data sources?
The two main categories are primary sources, where data is collected for the first time, and secondary sources, which use existing published or unpublished data.
How is personal observation used for data collection?
Personal observation involves collecting information directly in the field through direct observation of geographical features, settlements, or population characteristics.
Can you give an example of data used in news bulletins?
Yes, news bulletins often display data such as the temperatures recorded in major cities on a given day.
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NCERT Class 12 Geography — Practical Work in Geography Part II — Chapter 1 — Data and its Sources. Verified by NCERT Help Editorial Team. Reviewed on 29 Jul 2026. Last updated 10 Aug 2026.