Class 6 Social Science Chapter 4 Timeline and Sources of History from Exploring Society: India and Beyond – easy notes, concepts, NCERT book solutions, important questions and worksheet. Learn about timelines, historical sources and how historians study the past in simple language.

Class 6 Social Science

Chapter 4 – Timeline and Sources of History

Exploring Society: India and Beyond

Chapter Overview

History helps us understand the human past. It tells us how people lived, worked, travelled, communicated, produced food and built communities. To study history properly, we need two important things: time and evidence.

Easy idea: Think of history as a huge puzzle. Historians collect different pieces of evidence and arrange them carefully to understand what happened in the past.

National Museum, New Delhi — museums preserve objects that help us understand the past.

The Big Questions

1. How do we measure historical time?

Historical time is understood through calendars, dates, timelines, centuries, millennia and other units of time.

2. How can various sources help us understand history?

Objects, buildings, inscriptions, manuscripts, oral traditions, paintings, scientific evidence and many other sources provide clues about the past.

3. How did early humans live?

Early humans depended mainly on hunting and gathering. They used tools, controlled fire, lived in groups and gradually developed farming, animal domestication and settled communities.

1. What Is History?

History is the study of the human past.

The Earth is extremely old, while human history occupies only a small part of Earth’s very long story.

Remember: History is not only about kings and battles. It also includes ordinary people’s lives, food, houses, tools, occupations, beliefs, art, farming and communities.

Why Do We Study the Past?

To understand how societies changed.
To understand traditions and cultures.
To understand how present conditions developed.
To learn from successes and mistakes of earlier societies.
To understand the lives of people who lived before us.

2. Who Helps Us Learn About the Past?

Expert	What the expert studies
Geologist	Rocks, Earth’s structure and physical changes of the Earth.
Palaeontologist	Fossils and ancient forms of life.
Anthropologist	Human beings, societies, cultures and ways of life.
Archaeologist	Material remains such as tools, pottery, buildings, burials and other objects left by people.

Fossils: Preserved remains, impressions or traces of ancient plants and animals found in rocks or sediments.

3. How Is Time Measured in History?

Different societies have developed calendars to measure time. Today, the Gregorian calendar is widely used around the world, while many other calendars continue to be used for cultural and religious purposes.

CE and BCE

Term	Meaning	Simple understanding
CE	Common Era	Years counted in the Common Era.
BCE	Before Common Era	Years before the Common Era.
AD	Anno Domini	An older designation corresponding to CE years.
BC	Before Christ	An older designation corresponding to BCE years.

Important: In the Gregorian calendar used for historical dating, there is no year 0. The year 1 BCE is followed immediately by 1 CE.

4. Understanding BCE and CE

BCE dates become smaller as we move towards the beginning of the Common Era. CE dates become larger as we move forward in time.

300 BCE
An event happened before the Common Era.

100 BCE
A later BCE date.

1 BCE
Immediately before 1 CE.

1 CE
There is no year zero between 1 BCE and 1 CE.

100 CE
A later Common Era date.

2024 CE
A modern Common Era date.

Calculating Across BCE and CE

When finding the number of years between a BCE date and a CE date, because there is no year zero, add the two numbers and subtract 1.

Example:
560 BCE to 2024 CE
560 + 2024 − 1 = 2,583 years

This is the method used in the chapter for calculating the approximate time from the Buddha’s birth to 2024 CE.

5. Timeline

A timeline is a visual arrangement of dates and events in chronological order.

Why Are Timelines Useful?

They show which event happened first.
They help compare events.
They make long periods easier to understand.
They help us see changes over time.
They help connect different historical events.

300,000 BCE
Early period of Homo sapiens shown on the historical timeline.

Early human communities
Hunting, gathering, tool-making and use of fire.

Beginning of farming
People gradually began cultivating crops and domesticating animals.

Villages
Settled communities became increasingly organised.

Modern period
Written records and many other sources become increasingly abundant.

6. Decade, Century and Millennium

Unit	Length	Example
Decade	10 years	2011–2020 is a decade.
Century	100 years	1901–2000 is the 20th century.
Millennium	1,000 years	2001–3000 is the 3rd millennium CE.

Common mistake: The 20th century was not 1900–1999. It was 1901–2000. The 21st century began in 2001.

7. Calendars in India

Calendars help societies organise days, months, seasons, festivals and important events.

India has a long tradition of using different calendars. Many traditional Indian calendars use astronomical observations involving the Sun and Moon.

Panchanga

A Panchanga is a traditional Indian calendar containing information about dates and astronomical details. It can include information about festivals, sunrise and sunset and astronomical events.

Remember: Different calendars may follow different systems, but all help people organise and understand time.

8. What Are Sources of History?

A source of history is evidence that helps us learn about the past.

Main Types of Sources

Source	Examples	What it may tell us
Archaeological	Tools, pottery, coins, buildings, bones, inscriptions	Technology, economy, lifestyle, architecture and political history.
Literary	Books, manuscripts, letters, records	Ideas, beliefs, events, languages and social life.
Oral	Stories, memories, traditions, songs	Community memories, traditions and cultural practices.
Artistic	Paintings, sculptures, monuments	Art, beliefs, clothing, activities and cultural values.
Scientific	Dating methods, DNA studies and other scientific analysis	Age, biological relationships and information about ancient environments.

9. Archaeological Sources

Archaeologists study material remains left behind by people.

Coins
Pottery
Tools
Weapons
Jewellery
Buildings
Burial sites
Inscriptions
Human and animal remains

Lion Capital of Ashoka at the Archaeological Museum, Sarnath.

Objects such as coins and inscriptions can help historians identify rulers, languages, symbols, political ideas and cultural practices.

10. Literary Sources

Written sources are extremely useful for studying periods in which written records were produced.

Examples include:

Manuscripts
Letters
Official records
Books
Travel accounts
Religious and philosophical texts

However, historians do not accept every written statement blindly. They compare different sources and consider who created the source, when it was created and why it was created.

11. Oral Sources

Oral sources are information passed from one person or generation to another through spoken traditions.

Examples include:

Family memories
Local stories
Folk songs
Legends
Traditional knowledge

Oral sources can be valuable, but memories may change over time. Therefore historians compare oral information with other evidence.

12. Artistic Sources

Art can tell us a great deal about the people who created it.

Paintings, sculptures, carvings and monuments can provide clues about clothing, tools, animals, religious beliefs, social activities and artistic skills.

Prehistoric rock paintings at Bhimbetka.

13. Scientific Methods

Modern science gives historians additional ways of studying the past.

Scientific dating can help estimate the age of archaeological remains.
Study of bones can provide information about ancient humans and animals.
DNA studies can help investigate biological relationships and population history.
Study of plants and sediments can provide clues about ancient environments.

History + Science: Historians often work with scientists and specialists to understand evidence more accurately.

14. Historians as Detectives

Historians can be compared with detectives because both investigate evidence and try to reconstruct what happened.

Detective	Historian
Looks for clues.	Looks for historical evidence.
Questions witnesses and examines evidence.	Studies written, archaeological, oral and artistic sources.
Compares clues.	Compares different sources.
Builds an explanation.	Reconstructs the past from available evidence.

15. The Beginnings of Human History

Early humans lived in changing environments and depended heavily on nature. They learned gradually how to use resources around them.

Hunting and Gathering

Early humans obtained food by hunting animals and gathering fruits, roots, nuts, seeds and other edible plants.

Moving from Place to Place

When food and water became scarce, groups could move to another location. This way of life is often described as mobile or nomadic.

Tools

Stone, bone and wood were used to make tools for cutting, hunting, processing food and other activities.

Fire

Fire was extremely important. It provided warmth and light, helped people cook food and offered protection from some wild animals.

16. Rock Shelters and Rock Art

Rock shelters provided protection from weather and other dangers. Some prehistoric communities also created paintings on rock surfaces.

Rock paintings at Bhimbetka, an important source for understanding prehistoric life.

What Can Rock Paintings Tell Us?

Animals that people observed.
Hunting activities.
Human figures and group activities.
Artistic skills.
Possible cultural and symbolic ideas.

We must be careful when interpreting prehistoric pictures because we do not have complete information about the intentions of the people who created them.

17. Ornaments and Other Objects

Early humans also made ornaments and other useful objects. Such remains can provide clues about skills, materials and social life.

Objects made from stone, bone, shells or other materials can help researchers understand how people used their surroundings.

18. The First Crops

Over a very long period, some human communities began cultivating plants instead of depending only on wild food.

People also began domesticating animals. Farming and animal domestication changed human life in major ways.

Why Was Farming Important?

People could produce food in one place.
Some communities became more settled.
Animals could provide food, materials and labour.
Food could sometimes be stored for later use.
Villages and larger communities gradually developed.

Illustration of an early farming community

Illustrative reconstruction of an early farming community.

19. From Farming Communities to Villages

As communities became more settled, people developed new ways of working together.

Growing crops
Raising animals
Making pottery
Building houses
Storing food
Making tools
Exchanging goods
Managing shared resources

Over time, some villages became larger and developed into towns. New technologies, including metalworking, also changed human life.

20. Family History as a Source

Our own family can also be studied through historical sources.

Possible Sources

Old photographs
Letters
Diaries
Certificates
Old utensils
Jewellery
Family stories
Buildings and houses
Interviews with older family members

Activity idea: Make a three-generation family tree. Write names, occupations, birthplaces and the source from which each piece of information was collected.

21. In-Text Questions and Activities

The Big Question: How do we measure historical time?

Answer: We use calendars, dates and timelines. Historical periods can also be described using decades, centuries, millennia, BCE and CE.

The Big Question: How can various sources help us understand history?

Answer: Different sources provide different kinds of evidence. Coins, buildings and tools can reveal material life; written records can provide information about events and ideas; oral traditions preserve memories; and scientific methods help analyse age and biological evidence.

The Big Question: How did early humans live?

Answer: Early humans hunted and gathered food, moved according to available resources, made tools, used fire, lived in groups and created rock art. Later, some communities began farming and domesticating animals.

Think About It: What is the earliest memory you can recollect?

Answer: This is a personal-response activity. Students should describe their earliest memory and approximately how old they were.

Think About It: How can understanding the past help us understand the present?

Answer: The past explains how present societies, traditions, technologies and institutions developed. It also helps us understand change and learn from earlier experiences.

Let’s Explore: Draw a timeline from 2 BCE to 2 CE.

Answer: 2 BCE → 1 BCE → 1 CE → 2 CE. There is no year 0, so only three years separate 2 BCE and 2 CE.

Let’s Explore: Calculate the years between a BCE date and a CE date.

Rule: Add the BCE and CE numbers and subtract 1.

Example: 500 BCE to 1000 CE: 500 + 1000 − 1 = 1,499 years.

Let’s Explore: Create a family timeline from 1900 CE to the present.

Answer: Students should place the birth years of their grandparents, parents, siblings and themselves on a chronological timeline. The 20th century began in 1901 and ended in 2000.

Let’s Explore: Create a family tree covering at least three generations.

Answer: Students should collect information from family members and available documents, then show parents, grandparents and great-grandparents in a family tree.

Think About It: What information can old coins, books, clothes, jewellery, utensils, houses or buildings provide?

Answer: They can reveal information about technology, fashion, economy, craftsmanship, food habits, architecture, social life, rulers and cultural practices.

Let’s Explore: What information can pictures of historical objects provide?

Answer: Coins may identify rulers or symbols; sculptures can show artistic and cultural ideas; inscriptions can provide information about language, rulers and public messages.

Let’s Explore: Identify activities of early humans in a rock shelter.

Answer: Possible activities include making tools, using fire, preparing food, hunting-related work, creating rock paintings and making ornaments.

Let’s Explore: Identify the main activities in an ancient agricultural community.

Answer: Farming, harvesting, animal keeping, cooking, tool-making, building, food processing and community activities can be identified.

Think About It: Discuss the roles of men and women shown in the pictures.

Answer: We should not assume that the roles shown in an illustration represent every person in the past. Men and women may have shared many activities, and the available evidence is limited.

22. End-of-Chapter Practice

Can historians be compared with detectives?

Yes. Both investigate clues, compare evidence, ask questions and build an explanation from incomplete information. Historians use sources such as objects, writings, oral traditions and scientific evidence to reconstruct the past.

Date Practice

Arrange chronologically:

323 BCE → 1900 BCE → 100 BCE → 100 CE → 323 CE → 1090 CE → 2024 CE

Remember that earlier BCE dates have larger numbers when moving farther back in time.

Century Practice

A person born in 320 CE belonged to the 4th century CE.

The Rani of Jhansi was born in 1828, so she belonged to the 19th century.

Years Ago

For very ancient events, historians may use expressions such as “12,000 years ago”. Converting such a statement into a calendar date requires knowing the reference year and remembering that BCE/CE has no year zero.

23. Museum Activity

A museum preserves objects from the past and provides opportunities to study them directly.

Before the Visit

Find out what collections the museum has.
Choose a few objects to study.
Carry a notebook.

During the Visit

Record the object’s name.
Note its approximate date or period.
Observe its material.
Write what information it gives about the past.

After the Visit

Write a short report describing the most interesting object and what you learned from it.

24. Quick Revision

Term	Meaning
History	Study of the human past.
Timeline	Arrangement of events in chronological order.
BCE	Before Common Era.
CE	Common Era.
Decade	10 years.
Century	100 years.
Millennium	1,000 years.
Archaeologist	Studies material remains of past societies.
Fossil	Preserved remains or traces of ancient life.
Source of history	Evidence used to understand the past.
Anthropologist	Studies humans, societies and cultures.
Palaeontologist	Studies fossils and ancient life.
Geologist	Studies Earth’s rocks, structure and physical history.

25. Exam-Ready Key Points

History helps us understand the human past.
Historians use evidence from many sources.
There is no year 0 between 1 BCE and 1 CE.
A decade has 10 years.
A century has 100 years.
A millennium has 1,000 years.
The 20th century was 1901–2000.
The 21st century began in 2001.
Archaeological sources include tools, coins, pottery and buildings.
Literary sources include manuscripts, books and records.
Oral traditions preserve memories and cultural knowledge.
Rock paintings provide clues about prehistoric life.
Early humans hunted, gathered, used tools and controlled fire.
Farming and animal domestication encouraged more settled communities.
Villages gradually became more organised and developed new technologies.

Picture Sources

The photographs used above are embedded directly in the page. They are from Wikimedia Commons and are used according to the licences indicated on their respective file pages.

National Museum, New Delhi building — Wikimedia Commons.
Lion Capital of Ashoka at Archaeological Museum, Sarnath — Wikimedia Commons.
Prehistoric rock paintings at Bhimbetka — Wikimedia Commons.

This worksheet for Chapter 4 is designed for easy practice and revision. It includes important questions and activities based on the textbook. Students can use it to check their understanding, strengthen their concepts and prepare for exams.

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Class 6 Social Science Chapter 4 – Timeline and Sources of History | Exploring Society: India and Beyond | Notes, Solutions & Worksheet