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Timeline and Sources of History – Class 6 Social Science Chapter 4 Notes & NCERT PDF

Class 6Social ScienceChapter 4NCERT book: Exploring Society: India and Beyond - Social Science Class 6

Notes and a simple summary of Chapter 4 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 4: Timeline and Sources of History

The Big Questions

  • How do we measure historical time?
  • How can various sources help us understand history?
  • How did early humans live?
    • History is "an unending dialogue between the present and the past ... We can fully understand the present only in the light of the past." — E.H. Carr

    Introduction

    The chapter opens at the National Museum, New Delhi, where statues, coins and ornaments from the past are preserved. Think of your earliest memory: it is part of your past. History is the study of the human past. The Earth's history is very, very long, about 4.54 billion years (Fig. 4.1), and humans occupy only a tiny, most recent part of it.

    Key Concepts

    1. Who studies the past?

  • Geologists study the Earth's physical features: soil, stones, hills, rivers, seas.
  • Palaeontologists study fossils of plants, animals and humans from millions of years ago.
  • Anthropologists study human societies and cultures from the oldest times to the present.
  • Archaeologists dig up remains: tools, pots, beads, figurines, toys, bones, burnt grains, bricks.
  • Epigraphists study ancient inscriptions. Historians study and write about the past.

    • 2. How is time measured?

  • Societies mark eras from big events such as a birth or a ruler's reign.
  • The Gregorian calendar is used worldwide. It has 12 months and 365 days, with a leap year every four years. Century years are leap years only if divisible by 400, so 2000 was a leap year but 1800 and 1900 were not.
  • Hindu, Muslim, Jewish, Chinese and other calendars are used alongside it for festivals.
  • CE (Common Era), formerly AD, counts forward from the conventional year of Jesus's birth. Example: India's independence, 1947 CE.
  • BCE (Before Common Era), formerly BC, counts backward. Example: 560 BCE, the approximate birth year of Gautama Buddha.

    • There is no year zero! 1 CE comes straight after 1 BCE. To find the years between a BCE date and a CE date, add them and subtract 1:

  • From 2 BCE to 2 CE: 2 + 2 − 1 = 3 years
  • Buddha's birth (560 BCE) to 2024 CE: 560 + 2024 − 1 = 2,583 years ago

    • Longer units of time

  • Decade = 10 years; century = 100 years; millennium = 1,000 years.
  • We live in the 21st century CE (2001–2100) and the 3rd millennium CE (2001–3000).
  • BCE centuries count backward: the 3rd century BCE = 300 BCE to 201 BCE, and the 1st millennium BCE = 1000 BCE to 1 BCE.

    • Timelines. A timeline shows dates and events in order. Fig. 4.3 runs from 300,000 BCE to today: first rock art, the Ice Age, the end of the last ice age, the first settlements and agriculture, pottery in the Indian Subcontinent, copper metallurgy, the Indus-Sarasvatī civilisation, the world's first cities in Mesopotamia, the Buddha, Aśhoka and Jesus. Even without dates, it shows that the Buddha came before Jesus.

    Pañchānga: a traditional Indian book of tables based on the Sun and Moon. It gives days of each month, eclipses, sunrise and sunset times, festival dates and even weather predictions, and is still widely used.

    3. Sources of history

    A source of history is a place, person, text or object that gives information about the past. The book's diagram groups sources as:

  • Literary sources: Vedas and Itihāsas, poems and plays, manuscripts, historical texts and chronicles, scientific and technological texts, travelogues, folklore, genealogical records
  • Archaeological sources: excavations, mounds, habitations and burials, tools and weapons, coins, ornaments, pottery and toys, human, animal and plant remains, structures and monuments, inscriptions and copper plates
  • Artistic sources: paintings, sculptures, panels
  • Oral sources: collections of stories and folk memory

    • Each source is like a piece of a jigsaw puzzle, and some pieces are always missing. Historians compare many sources. When sources contradict, they must decide which one to trust. Newer help comes from science: ancient climate studies, chemical tests of excavated materials and genetics. For recent history, newspapers and electronic media are also used.

    4. The beginnings of human history

  • *Modern humans (Homo sapiens)* have lived for about 300,000 (three lakh) years.
  • Early humans lived in bands, were hunter-gatherers, and lived in temporary camps, rock shelters and caves. They used fire, made stone axes, blades and arrowheads, painted rock art, made beads and pendants, and may have believed in an afterlife.
  • The last Ice Age lasted from over 100,000 years ago to about 12,000 years ago. When the ice melted, rivers swelled.
  • The first crops: people began settling down, growing cereals, and domesticating cattle and goats, often near rivers (for water and fertile soil).
  • Communities grew into hamlets, villages and small towns. They had chieftains and worked the land collectively, with no individual ownership. New technologies arrived: pottery, and metals (copper first, iron later). This prepared the way for civilisation (Chapter 6).
    • Think about it: Pictures often show fixed roles for men and women, but women may also have painted rock shelters, and men may have cooked or cared for children. Our information is limited!

    Activities in the Chapter

  • Draw a timeline from 2 BCE to 2 CE and see that only 3 years pass.
  • Make a timeline from 1900 CE to today with family birthdays.
  • Build a family tree of three generations: names, occupations, birthplaces and your sources (photos, ID cards, relatives' memories).
  • Identify objects in the images of sources, the rock-shelter scene and the early farming village.

    • Key Terms

  • History (इतिहास): study of the human past
  • Fossil (जीवाश्म): preserved remains or impressions of plants or animals
  • Era (युग / संवत्): a distinct period of time
  • CE / BCE (ईसवी / ईसा पूर्व): Common Era / Before Common Era
  • Decade (दशक), Century (शताब्दी), Millennium (सहस्राब्दी)
  • Timeline (समयरेखा): dates and events shown in order
  • Source of history (इतिहास का स्रोत)
  • Archaeologist (पुरातत्वविद्)
  • Inscription (अभिलेख): writing carved on stone or metal
  • Hunter-gatherer (शिकारी-संग्राहक)
  • Hamlet (पुरवा / छोटी बस्ती): small settlement
  • Ice Age (हिमयुग)
  • Genetics (आनुवंशिकी)

    • Connect to Today

    Your family photos, Aadhaar card and your grandmother's stories are all sources for your family's history, just as coins and inscriptions are for kings and empires.

    Common Mistakes

  • Adding BCE and CE dates without subtracting 1, forgetting there is no year zero.
  • Thinking 300 BCE is later than 200 BCE. BCE numbers get smaller as time moves forward.
  • Calling 1828 the "18th century". It is the 19th century (1801–1900).
  • Thinking one source is enough. Historians cross-check many sources.

    • Questions and Activities: Hints

  • Chronological order: 1900 BCE, 323 BCE, 100 BCE, 100 CE, 323 CE, 1090 CE, 2024 CE.
  • Chandragupta born 320 CE: 4th century CE; 560 + 320 − 1 = 879 years after the Buddha's birth.
  • Rani of Jhansi born 1828: 19th century; 1947 − 1828 = 119 years before Independence.
  • "12,000 years ago" is roughly 10,000 BCE (counting from 2024: 12,000 − 2,024 + 1 = 9,977 BCE).
  • Are historians like detectives? Yes. They gather clues from many sources, compare them and reconstruct what happened.

    • 💡 Key Learning Points

    • ✓Historical time is measured in years, decades, centuries and millenniums using the Gregorian calendar with CE and BCE.
    • ✓There is no year zero, so years between a BCE and a CE date = the two numbers added, minus 1 (e.g., the Buddha was born 2,583 years before 2024).
    • ✓Sources of history are literary, archaeological, artistic and oral; historians compare them like pieces of a jigsaw puzzle.
    • ✓Geologists, palaeontologists, anthropologists, archaeologists and epigraphists all help reconstruct the past, now aided by science and genetics.
    • ✓Early humans (Homo sapiens, ~300,000 years) were hunter-gatherers; after the last Ice Age they began farming, settled near rivers and later used pottery, copper and iron.

    👨‍🏫 Teaching Tips

    • →Stretch a rope across the classroom as a timeline and let students peg cards for 560 BCE, 1 BCE, 1 CE, 1947 CE and today, showing there is no year zero.
    • →Practise BCE–CE arithmetic with the 'add and subtract 1' rule using the Buddha, Chandragupta and Aśhoka examples.
    • →Bring old coins, photos or a pañchānga and ask students what each 'source' tells us.
    • →Run a 'history detectives' activity: give groups two slightly contradictory accounts of a school event and ask them to decide what really happened.
    • →Assign the three-generation family tree, including a 'source of information' column.
    • →Use the rock-shelter and early-village illustrations for a 'spot the activity' game, then discuss the gender-roles 'Think about it' box.
    • →Plan the museum visit from the exercises with a simple observation sheet.
    • →Explain the leap-year rule with 1900 versus 2000 as a quick maths connection.

    📋 Assessment Questions

    1. Can the student correctly place BCE and CE dates on a timeline in order?
    2. Can the student calculate years between BCE and CE dates remembering there is no year zero?
    3. Can the student identify the century of a given year (e.g., 1828 → 19th century; 300–201 BCE → 3rd century BCE)?
    4. Can the student classify given sources as literary, archaeological, artistic or oral?
    5. Can the student describe how early humans lived and what changed when farming began?

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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