Section 1
What Is History and Why Study It?
History is the study of people and events from the past. It helps us understand how the world has changed, why things are the way they are today, and guides us in making better decisions for the future.
In this Grade 4 history lesson from Discovering Our Past: a History of the World, students learn what history is and why it matters, exploring key concepts such as cause and effect, the roles of historians, and how time is measured using terms like decade, century, millennium, and era. The lesson also introduces major historical periods, from Prehistory through Modern History, and explains how calendars like the Julian and Gregorian systems were developed to track and organize time. Students come away understanding how studying the past helps explain the present and guides future decisions.
Section 1
What Is History and Why Study It?
History is the study of people and events from the past. It helps us understand how the world has changed, why things are the way they are today, and guides us in making better decisions for the future.
Section 2
The Role of Historians
Historians ask key questions like “What happened?” and “Why did it happen?” They study causes and effects, use sources like documents and artifacts, and explain how past events influence present-day life.
Section 3
Measuring Time and Historical Periods
Historians divide time into eras—Prehistory (before writing), Ancient History (until A.D. 500), the Middle Ages (A.D. 500–1400), and Modern History (after A.D. 1400). Time is measured in decades (10 years), centuries (100 years), and millennia (1,000 years).
Section 4
Calendars and Dating Systems
Most of the world uses the Gregorian calendar, introduced in A.D. 1582 to correct errors in the Julian calendar. Events are dated as B.C. (Before Christ) and A.D. (Anno Domini), or more neutrally as B.C.E. and C.E.
Section 5
Studying Prehistory Through Science
Scientists like archaeologists, paleontologists, and anthropologists study artifacts, fossils, and ancient human remains to learn about early humans. Famous discoveries, like "Lucy," help us understand human evolution and the species Homo sapiens.
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Section 1
What Is History and Why Study It?
History is the study of people and events from the past. It helps us understand how the world has changed, why things are the way they are today, and guides us in making better decisions for the future.
Section 2
The Role of Historians
Historians ask key questions like “What happened?” and “Why did it happen?” They study causes and effects, use sources like documents and artifacts, and explain how past events influence present-day life.
Section 3
Measuring Time and Historical Periods
Historians divide time into eras—Prehistory (before writing), Ancient History (until A.D. 500), the Middle Ages (A.D. 500–1400), and Modern History (after A.D. 1400). Time is measured in decades (10 years), centuries (100 years), and millennia (1,000 years).
Section 4
Calendars and Dating Systems
Most of the world uses the Gregorian calendar, introduced in A.D. 1582 to correct errors in the Julian calendar. Events are dated as B.C. (Before Christ) and A.D. (Anno Domini), or more neutrally as B.C.E. and C.E.
Section 5
Studying Prehistory Through Science
Scientists like archaeologists, paleontologists, and anthropologists study artifacts, fossils, and ancient human remains to learn about early humans. Famous discoveries, like "Lucy," help us understand human evolution and the species Homo sapiens.
Book overview
Jump across lessons in the current chapter without opening the full course modal.
Continue this chapter