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Locating Places on the Earth – Class 6 Social Science Chapter 1 Notes & NCERT PDF

Class 6Social ScienceChapter 1NCERT book: Exploring Society: India and Beyond - Social Science Class 6

Notes and a simple summary of Chapter 1 of the NCERT Class 6 Social Science book, with the official chapter PDF, flashcards, an MCQ quiz and an AI tutor for your doubts.

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Chapter 1: Locating Places on the Earth

The Big Questions

  • What is a map and how do we use it? What are its main components?
  • What are coordinates? How can latitude and longitude be used to mark any location on the Earth?
  • How are local time and standard time related to longitude?
    • "The globe of the Earth stands in space, made up of water, earth, fire and air and is spherical. ... It is surrounded by all creatures, terrestrial as well as aquatic." — Āryabhaṭa (about 500 CE)

    Introduction

    Imagine you are visiting a city for the first time. How would you find your way? You could ask someone, or you could look at a map. The chapter opens with a game: a map of an imaginary small city (Fig. 1.1) with a railway station, bank, public garden, school, museum, market, hospital and a lake. You get off the train and must find the bank. As the book says, "A map is like a treasure guide; it shows you where things are and how to get to them."

    Key Concepts

    1. A map and its components

  • A map is a representation, or drawing, of an area, small (a village, a town), bigger (a district, a state) or very large (India, the whole world). On a map, we look at the surface as if from the top.
  • An atlas is a book or collection of maps.
  • Kinds of maps:

    • - Physical maps show natural features: mountains, oceans, rivers.

    - Political maps show countries, states, boundaries and cities.

    - Thematic maps show one specific kind of information.

  • Three components of a map: distance, direction and symbols.

    • Distance and scale. A map's scale lets a huge place fit on a small piece of paper. If 1 cm on the map stands for 500 m on the ground, the scale is 1 cm = 500 m. On the book's map of India (Fig. 5.2), a ruler 2.5 cm long stands for 500 km, so 1 cm = 200 km.

    Direction. The four cardinal directions (cardinal points) are north (at the top), and, moving clockwise, east, south and west. The intermediate directions are northeast (NE), southeast (SE), southwest (SW) and northwest (NW). Most maps show just an arrow marked 'N' pointing north.

    Symbols. There is no room to draw every building, so map makers use symbols for railway lines and stations, roads, boundaries, rivers, wells, bridges, temples, churches, mosques, post offices (PO), police stations (PS), trees and settlements. In India, the Survey of India, a government body, has fixed a standard set of symbols (Fig. 1.2).

    2. Mapping the Earth: the globe

    The Earth is nearly a sphere. It is slightly flattened at the poles. A sphere cannot be drawn accurately on flat paper. Try flattening pieces of orange peel: they tear at the edges! A globe is a sphere with a map drawn on it, so it represents the Earth's geography better than a flat map.

    3. Coordinates

    In chess, each square has a letter (a–h) and a number (1–8), so a pawn moves "from d2 to d4". In a market you might say "the 7th shop in the 5th row". Two values fix a position. This is a system of coordinates, and maps use the same idea.

    4. Latitudes

  • The North Pole and South Pole are the fixed points of a rotating globe. Halfway between them is the Equator.
  • Latitude measures distance from the Equator. A parallel of latitude is an imaginary east–west circle parallel to the Equator.
  • The Equator is 0°, the largest circle. Parallels get smaller towards the poles. The poles are 90°N and 90°S.
  • Latitude and climate: near the Equator it is hot (torrid), further away it is moderate (temperate), and near the poles it is cold (frigid).

    • 5. Longitudes

  • Meridians of longitude are half-circles from pole to pole.
  • The reference line is the Prime Meridian (0°), also called the Greenwich Meridian. In 1884, nations agreed that the meridian through Greenwich (London, England) would be the international standard.
  • Longitude measures distance from the Prime Meridian along the Equator. It runs 0° to 180°, with E or W. Rounded examples from the book: New York 74°W, Delhi 77°E, Tokyo 140°E. 180°E and 180°W are the same line, written just 180°.
  • Latitude + longitude = the two coordinates of a place: "Delhi lies at 29°N latitude and 77°E longitude" (rounded values). All these lines together form the grid.
  • The Prime Meridian divides the Earth into Eastern and Western Hemispheres. The Equator divides it into Northern and Southern Hemispheres.
    • India's own prime meridian: Centuries before Europe, Indian astronomers used a madhya rekhā ('middle line') passing through Ujjayinī (Ujjain), about 75.8°E, a great centre of astronomy where Varāhamihira worked some 1,500 years ago.

    India extends roughly from 8°N to 37°N and 68°E to 97°E (Fig. 1.6).

    6. Understanding time zones

  • The Earth turns 360° in 24 hours, so 15° = 1 hour (15 × 24 = 360).
  • Going east from Greenwich, add 1 hour per 15°: noon at Greenwich is 1 pm at 15°E and 2 pm at 30°E. Going west, subtract: 11 am at 15°W.
  • Local time depends on the Sun at each place. Using many local times would be inconvenient, so countries adopt a standard time. Indian Standard Time (IST) = GMT + 5 hours 30 minutes (5.5 hours).
  • Time-zone lines are not straight. They bend along international borders.
  • Large countries have several zones: USA 6, Russia 11. Crossing Russia, you reset your watch 10 times.
  • The International Date Line is roughly at 180°, where the +12 and −12 zones meet. Crossing it eastward, you subtract a day. Crossing it westward, you add a day.

    • Activities in the Chapter

  • City map game: mark the hospital, explain the blue areas (water), and find which is farthest from the station.
  • Draw your school map in groups and compare.
  • Playground map: 40 m × 30 m at 1 cm = 10 m gives 4 cm × 3 cm. The diagonal measures 5 cm = 50 m.
  • True/false directions on the city map (e.g., "The museum is southeast of the bank").
  • Porbandar (Gujarat) and Tinsukia (Assam): the sun has set in Assam but it is still daylight in Gujarat. With a 30° difference, local times differ by 2 hours. Both still follow the same IST.

    • Key Terms

  • Map (मानचित्र): drawing of an area seen from above
  • Atlas (एटलस): collection of maps
  • Scale (पैमाना): ratio of map distance to ground distance
  • Cardinal directions (मुख्य दिशाएँ): N, E, S, W
  • Symbol (प्रतीक / रूढ़ चिह्न): sign representing a feature
  • Globe (ग्लोब): spherical model of the Earth
  • Equator (भूमध्य रेखा): 0° latitude, largest circle
  • Latitude (अक्षांश): distance from the Equator
  • Longitude (देशांतर): distance from the Prime Meridian
  • Prime Meridian (प्रधान मध्याह्न रेखा): 0° longitude through Greenwich
  • Grid (ग्रिड / जाल): network of latitudes and longitudes
  • Hemisphere (गोलार्ध): half of the Earth
  • Local time (स्थानीय समय): time by the Sun's position at a place
  • Standard time (मानक समय): one official time for a country
  • International Date Line (अंतर्राष्ट्रीय तिथि रेखा): ~180°, where the date changes

    • Connect to Today

    Phone maps use the same latitude–longitude coordinates. When your cousin abroad calls, time zones explain why it is night there when it is afternoon here.

    Common Mistakes

  • Mixing up latitude (east–west lines, measure north–south distance) and longitude (pole-to-pole lines, measure east–west distance).
  • Thinking all parallels are the same length. Only the Equator is the longest; the parallels shrink towards the poles.
  • Thinking time-zone lines follow meridians exactly. They follow borders.
  • Forgetting that going east adds time and going west subtracts it.

    • Questions and Activities: Hints

  • Q2: India is 5 h 30 min ahead of GMT, so noon in London = 5:30 pm in India.
  • Q6: Delhi and Bengaluru share 77°E, so their local times are the same. Only latitude differs.
  • Q7 True/False: the Equator is a parallel of latitude (T); South Pole = 90°S (T); a meridian is half the Equator's length (T, a half-circle of the same size); all parallels equal (F); Assam's local time = IST (F); time-zone lines = meridians (F).

    • 💡 Key Learning Points

    • ✓A map's three components are distance (scale), direction and symbols; the Survey of India fixes standard map symbols.
    • ✓Latitude measures distance from the Equator (0° to 90°N/S); longitude measures distance from the Prime Meridian at Greenwich (0° to 180°E/W).
    • ✓Latitude and longitude together are coordinates that locate any place; India spans about 8°N–37°N and 68°E–97°E.
    • ✓The Earth turns 15° per hour, so longitude sets local time; IST is GMT + 5 h 30 min.
    • ✓India had its own prime meridian through Ujjayinī (Ujjain), and the International Date Line near 180° changes the date.

    👨‍🏫 Teaching Tips

    • →Start with the city-map game (Fig. 1.1): let pairs trace routes from the station to the bank and the market using directions.
    • →Do the orange-peel demonstration so students see why a sphere cannot be flattened without tearing.
    • →Use a real chessboard or the classroom seating grid (row, column) to introduce coordinates before latitude/longitude.
    • →Shine a torch on a globe in a darkened room and rotate it eastward to show morning, noon and night in different countries.
    • →Have students draw the 40 m × 30 m playground at 1 cm = 10 m and discover the 50 m diagonal themselves.
    • →Role-play the Porbandar–Tinsukia phone call to contrast local time and IST.
    • →Mark Ujjain on the India map and discuss Varāhamihira and Indian astronomy to connect geography with heritage.
    • →Finish with the chapter's crossword as a quick revision game.

    📋 Assessment Questions

    1. Can the student name the three components of a map and use a scale to convert map distance to real distance?
    2. Can the student distinguish latitude from longitude and state the values for the Equator, poles and Prime Meridian?
    3. Can the student calculate a local-time difference from a longitude difference (15° = 1 hour)?
    4. Can the student explain the difference between local time and standard time using the IST example?
    5. Can the student explain what happens to the date when crossing the International Date Line east or west?

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    Keep learning

    All chapters in Exploring Society: India and Beyond - Social Science Class 6

    1. 1. Locating Places on the Earth
    2. 2. Oceans and Continents
    3. 3. Landforms and Life
    4. 4. Timeline and Sources of History
    5. 5. India, That Is Bharat
    6. 6. The Beginnings of Indian Civilisation
    7. 7. India’s Cultural Roots
    8. 8. Unity in Diversity, or ‘Many in the One’
    9. 9. Family and Community
    10. 10. Grassroots Democracy – Part 1: Governance
    11. 11. Grassroots Democracy – Part 2: Local Government in Rural Areas
    12. 12. Grassroots Democracy – Part 3: Local Government in Urban Areas
    13. 13. The Value of Work
    14. 14. Economic Activities Around Us