---
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knowledge_type: "chapter"
entity_type: "chapter"
id: "66f154a5e361cd99fe36ce3c"
title: "Latitude, Longitude and Time"
board: "CBSE"
curriculum: "CBSE"
class: "Class 11"
subject: "Geography"
book: "Practical Work in Geography"
chapter: "Latitude, Longitude and Time"
chapter_slug: "latitude-longitude-and-time"
canonical_url: "https://www.edzy.ai/cbse-class-11-geography-practical-work-in-geography-latitude-longitude-and-time"
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source: "Edzy"
version: 1
last_updated: "2026-06-20"
---

# Latitude, Longitude and Time
This chapter elaborates on the concepts of latitude and longitude, essential for understanding geographical positioning. It discusses how the Earth’s shape and rotation influence the establishment of imaginary lines which help in precise location mapping.

---

## Knowledge Snapshot

| Field | Details |
| :--- | :--- |
| Class | Class 11 |
| Subject | Geography |
| Book | Practical Work in Geography |
| Chapter | Latitude, Longitude and Time |
| Pages | 24-34 |

---

## Chapter Summary

### Short Summary
The chapter unveils the structure of latitude and longitude, illustrating how these coordinates are defined and measured, which helps in locating places on Earth.

### Detailed Summary
Latitude and longitude create a grid system on Earth that allows for precise positioning of points. The chapter describes how the Earth's oblate spheroid shape arises from its rotation and bulging at the equator. Parallels of latitude and meridians of longitude are introduced, explaining how they differ in spacing and function. The meridian system is used to tell time based on the sun's movement, with examples illustrating local times around the world, emphasizing the significance of the Prime Meridian and International Date Line.

---

## Topic-Wise Explanation

### Introduction to Latitude and Longitude
The introduction details the importance of latitude and longitude as a coordinate system that allows for the precise mapping of locations on Earth.

### Parallels of Latitude
Parallels of latitude are defined as horizontal lines that measure the angular distance north or south of the equator, which is designated as 0°. Each degree of latitude is approximately constant in length, but it varies slightly as one moves toward the poles.

### Meridians of Longitude
Meridians of longitude run vertically around the Earth, defined by their angular distance east or west of the Prime Meridian (0°). They converge at the poles and are used to establish time zones.

### Longitude and Time
This section explains the relationship between the Earth's rotation and local time. Each degree of longitude corresponds to a time difference of four minutes.

### International Date Line
A discussion on the International Date Line emphasizes its role in timekeeping, marking the change of days and handling the complexities of global time zones.

---

## Core Ideas

| Idea | Explanation |
| :--- | :--- |
| Location Mapping | The grid system of latitude and longitude enables the precise location of surface features on Earth. |

---

## Key Concepts

| Concept | Meaning |
| :--- | :--- |
| Latitude | The distance of a point north or south of the equator, measured in degrees. |
| Longitude | The distance of a point east or west of the Prime Meridian, measured in degrees. |

---

## Important Points for Revision
* The Earth is shaped like an oblate spheroid due to its rotation.
* Latitude is measured north or south from the equator, while longitude is measured east or west from the Prime Meridian.
* Parallels of latitude decrease in size from the equator to the poles.
* The Prime Meridian is designated as 0° longitude.
* Local time changes by four minutes for each degree of longitude.
* The International Date Line signifies a change of days as one travels across it.
* Standard Meridians establish uniform time across regions.
* Different countries may have multiple time zones based on their geographic span.

---

## Practice Questions

### Short Answer Questions
1. What are parallels of latitude?
2. How are meridians of longitude defined?
3. What is the significance of the Prime Meridian?
4. Explain how local time is calculated based on longitude.
5. What does the International Date Line represent?

### Long Answer Questions
1. Describe the effect of Earth’s rotation on time across different longitudes.
2. Explain the differences between parallels of latitude and meridians of longitude in terms of their functions.
3. Discuss the implications of the International Date Line on international travel and communication.

---

## Source Attribution

| Field | Value |
| :--- | :--- |
| Source | Edzy |
| Reference Type | examSubjectBookChapter |
| Reference ID | 66f154a5e361cd99fe36ce3c |
| Canonical URL | https://www.edzy.ai/cbse-class-11-geography-practical-work-in-geography-latitude-longitude-and-time |
| Markdown URL | https://www.edzy.ai/okf/chapter/cbse-class-11-geography-practical-work-in-geography-latitude-longitude-and-time.md |