📄Primary Source

A firsthand account or document from the period being studied.

⏳Radiocarbon Dating

A method dating organic remains by measuring carbon-14 decay.

⛪Reformation

A 16th-century movement that challenged the authority of the Catholic Church.

🎨Renaissance

A period of European cultural and intellectual rebirth from the 14th century.

🏛️Republic

A state in which power rests with elected representatives.

🔧Restoration

The process of returning a historic building or object to an earlier state.

🔥Revolution

A fundamental change in political power or social structure.

🏛️Roman Empire

A vast ancient empire centered on Rome from 27 BCE to 476 CE.

📚Secondary Source

A source that interprets or analyzes primary sources.

🐪Silk Road

An ancient network of trade routes connecting East and West.

⛓️Slavery

The owning and exploitation of human beings as property.

🧱Stratigraphy

The study of rock and soil layers to establish relative dating.

🗳️Suffrage

The right to vote in political elections.

📊Timeline

A graphical representation of events in chronological order.

📜Treaty

A formal written agreement between nations.

📜Treaty of Versailles

The 1919 peace treaty that ended World War I.

⚔️War

A sustained armed conflict between nations or groups.

💣World War I

A global conflict from 1914 to 1918 involving major world powers.

💥World War II

A global conflict from 1939 to 1945 involving most of the world's nations.