Timeline and Sources of History Chapter Notes | Social Studies (SST) Class 6 PDF Download

Introduction

Think about the earliest memory you can recall. How old were you then? These memories form a part of your past. Just as our personal histories shape who we are today, the history of the Earth helps us understand the present world. Scientists have discovered that the Earth has a very long history, and humans occupy only a tiny, recent part of it.

Who Studies the History of the Earth?

1. Geologists: They study the physical features of the Earth, such as soil, stones, hills, mountains, rivers, seas, and oceans.
2. Palaeontologists: They examine the remains of plants, animals, and humans from millions of years ago through fossils.
3. Anthropologists: They study human societies and cultures from ancient times to the present.
4. Archaeologists: They dig up remains left by people, plants, and animals, such as tools, pots, toys, bones, teeth, and parts of houses.

How Is Time Measured in History?

Can you identify which calendar is most widely used around the world today?

Yes, the Gregorian calendar is the most widely used around the world today. It is commonly used for civil purposes, while other calendars, such as the Hindu, Muslim, Jewish, and Chinese calendars, are often used for religious festivals and special occasions.

• Different societies and cultures have their own ways of measuring time. Important events, like the birth of a famous person or the beginning of a ruler's rule, often mark the start of a new era. 
• Today, most people around the world use the Gregorian calendar, but other calendars, like the Hindu, Muslim, Jewish, and Chinese calendars, are also used, especially for setting dates for festivals and special occasions.
• In the Western world, the calendar often starts from the year when Jesus Christ was believed to be born. Years after this point were marked with 'AD,' which is short for a Latin phrase meaning "in the year of our Lord." 
• Nowadays, people use 'CE,' which stands for "Common Era," instead of 'AD.' For example, the year India became independent, 1947, can be written as 1947 AD or 1947 CE.
• Years before Jesus' birth were counted backward and used to be marked with 'BC,' meaning "Before Christ." Now, this is called "Before Common Era," or BCE. For example, 560 BCE is roughly the year when Gautama Buddha was born.

Understanding History with a Timeline

• A timeline is a useful tool that shows important events in the order they happened. It helps us see how different events are connected over time. 
• The timeline usually starts from the earliest humans and goes all the way to the present day, highlighting key moments in history. Sometimes, a timeline skips large chunks of time (shown by a dotted line) to keep it from becoming too long.
  
• Timelines also make it easier to understand when events happened compared to each other. For example, even without knowing the exact years, you can easily see that Buddha was born before Jesus just by looking at their positions on the timeline.

Understanding Centuries and Millenniums

In addition to talking about years and decades (which are periods of ten years), we also use other terms to describe longer stretches of time.
Here are two important ones:

• Century: A century is a period of 100 years. We count centuries in history every 100 years starting from 1 CE. For example, we are in the 21st century CE, which goes from 2001 to 2100. Centuries before the Common Era (BCE) are also counted in 100-year periods, but backward. For instance, the 3rd century BCE includes the years from 300 BCE to 201 BCE.
• Millennium: A millennium is a period of 1,000 years. We count millenniums starting from 1 CE. For example, we are in the 3rd millennium CE, which started in 2001 CE and will end in 3000 CE. Millenniums BCE are also counted backward. For instance, the 1st millennium BCE includes the years from 1000 BCE to 1 BCE.

To sum it up:

• A century = 100 years
• A millennium = 1,000 years

Both centuries and millenniums can be counted forward (CE) or backward (BCE).

How Traditional Indian Calendars Work

• In India, calendars have been traditionally made based on the positions of the sun and the moon. 
• A panchanga is a special book that lists the days of each month along with important information about the sun, moon, and stars. 
• It can predict things like when solar and lunar eclipses will happen, and what time the sun will rise and set. 
• Panchangas are still used in India today and often include weather predictions, dates and times for festivals, and more.

What Are the Sources of History?

Main Sources of History

• When historians study history, they use many different sources of information. 
• These sources help them learn about things like ancient kings and queens, old monuments, wars, and trade items from long ago. 
• Historians try to gather information from as many sources as possible to get a complete picture.

Matching the Pieces

• Historians often compare different sources of information. Sometimes, the sources agree with each other, like pieces of a puzzle that fit together perfectly. 
• Other times, the sources might tell different stories, like puzzle pieces that don’t match. When this happens, historians have to decide which sources to trust more.

Who Helps Create History?

Historians aren’t the only ones who contribute to our understanding of the past.
They get help from:

• Archaeologists: Who study ancient artifacts and remains.
• Epigraphists: Who study ancient inscriptions.
• Anthropologists: Who study human societies and cultures.
• Literature and Language Experts: Who help understand old writings.

Scientific Studies

• In recent times, science has also become important in studying history. 
• For example, scientists study ancient climates, analyze materials found during excavations, and even study the genetics of ancient people. 
• These scientific methods give historians new information that adds to what they learn from other sources.

Recent History

• When studying more recent history (from the last two or three centuries), historians use newspapers as sources. 
• For the past few decades, electronic media like television and the internet have also become valuable tools for understanding history.

The Beginnings of Human History

Can you name one way early humans made their lives easier?

Yes, early humans made their lives easier by using tools like stone axes and arrowheads, which helped them hunt, build, and protect themselves.

• Modern humans, called Homo sapiens, have been on Earth for about 300,000 years. While this seems like a long time, it is only a small part of Earth's history. Let's take a quick look at how early humans lived.
• Early humans had to deal with many challenges from nature, so they lived in groups to help each other. They were always looking for shelter and food, mainly by hunting animals and gathering plants and fruits. They also had some beliefs about nature and possibly thought about what happens after death.
• These groups lived in temporary places like camps, rock shelters, or caves. They communicated using languages that we no longer know. They used fire and started making tools like stone axes, blades, and arrowheads to make life easier. We can see parts of their life in rock paintings found in caves around the world. 
• Some paintings show simple figures or symbols, while others show detailed scenes with animals or people. Over time, early humans also learned to make simple jewelry like beads and pendants from stones, shells, or animal teeth, and they sometimes traded these with other groups.

The First Crops

• Over many years, the Earth's climate has changed a lot. Sometimes it was very cold, and a large part of the Earth was covered with ice. This time is called the Ice Age.
• Later, when the weather warmed up, some of the ice melted, and the water flowed into rivers and oceans. The last Ice Age started over 100,000 years ago and ended about 12,000 years ago.
• After the Ice Age, life became easier for humans. In many places, people began to settle down and grow crops like cereals and grains. They also started keeping animals like cattle and goats. 
• With more food available, their communities grew bigger, and they often settled near rivers. This was because they needed water, and the soil near rivers was more fertile, which made it easier to grow crops.
• As communities grew, they became more complex. Leaders, called chieftains, took care of the people, and everyone worked together for the community’s benefit. There was no private land; instead, everyone shared the land for growing and harvesting crops.
• Over time, small villages grew bigger and started trading goods like food, clothes, and tools with each other. Some villages became small towns, and people invented new technologies like pottery for making clay pots and metal tools for daily use.

Conclusion

In this, we will learn how these early stages led to the development of 'civilization.' For now, it's important to remember that early humans faced many challenges and nearly disappeared, just like some earlier species. We owe our existence today to their bravery and persistence, even though we don't know who they were.

Key Words

1. History: The study of the human past.
2. Fossils: Impressions of footprints, or parts of plants or animals that are found preserved within layers of soil or rocks.
3. Era: A distinct period of time.
4. Gregorian calendar: The calendar now used the world over; it has 12 months adding up to 365 days, and a leap year every four years. However, century years — for example, 1800, 1900, 2000 — are years only if they are multiples of 400; so in the three centenary years above, only 2000 is a leap year.
5. Auspicious: Favourable or bringing luck; for instance, 'an auspicious beginning'.
6. Source of history: A place, person, text or an object from which we gather information about some past event or period.
7. Historian: A person who studies and writes about the past.
8. Genetics: The branch of biology that studies how, in plants, animals or humans, certain features and characteristics get passed down from one generation to the next.
9. Afterlife: A life that begins after death.
10. Welfare: Health, prosperity and well-being. 
11. Hamlet: A small settlement or small village.