Maya, Aztec, and Inca Civilizations Vocabulary

Unit Overview & Big Ideas

• The Big Idea: The Maya, Aztec, and Inca developed large, complex, and highly sophisticated civilizations in Central and South America prior to the arrival of Spanish explorers and conquistadors.

• Commonalities Among the Three Civilizations:

  • Practiced intensive agriculture to feed dense urban and rural populations.
  • Established complex social hierarchies, organized governments, and state religions.
  • Maintained powerful militaries and conquered neighboring territories or city-states.
  • Worshipped polytheistic pantheons deeply connected to natural phenomena, astronomy, and agricultural cycles.

• Distinct Regional Characteristics:

  • The Maya: Thrived in the tropical rainforests of the Yucatán Peninsula, Guatemala, Honduras, and Belize (c.\n 200–900\,\text{CE}). Renowned for advanced mathematics (concept of zero), double-calendar systems, astronomical accuracy, and hieroglyphic writing.
  • The Aztec: Centered at Tenochtitlán on Lake Texcoco in the Valley of Mexico ($1325–1521\,\text{CE}$). Built an empire of $400–500$ city-states through military conquest, enforcing a strict tribute system and conducting human sacrifices.
  • The Inca: Built a massive empire ($1438–1532\,\text{CE}$) extending over $2,000\,\text{miles}$ along the Andes Mountains and Pacific Coast of South America. Celebrated for extraordinary masonry, terraced agriculture, suspension bridges, quipu record-keeping, and the Royal Road network.

• Decline and Fall:

  • The Classic Maya rainforest cities were mysteriously abandoned between $800$ and $900\,\text{CE}$, likely due to a combination of environmental degradation, prolonged drought, warfare, and political instability.
  • Both the Aztec and Inca Empires were conquered by Spanish conquistadors in the 16th century (Cortés conquering the Aztec in $1521$; Pizarro conquering the Inca in $1534$).
  • Major factors in European conquest included superior military technology (steel swords, armor, firearms, cannons, and warhorses), strategic alliances with oppressed native groups, and catastrophic European epidemics (principally smallpox) to which Indigenous peoples had no natural immunity.

Historical Timeline & Chronology

• c.\n 1500\,\text{BCE}: Earliest Mesoamerican agricultural villages emerge.

• c.\n 200–900\,\text{CE}: Peak of Classic Maya civilization across Mesoamerica.

• c.\n 1300s: Beginning of Aztec wandering, settlement at Lake Texcoco ($1325\,\text{CE}$), and rise of the Aztec Empire.

• c.\n 1300s–1438\,\text{CE}: Rise and rapid expansion of the Inca Empire under Pachacuti and subsequent Sapa Incas.

• $1400s$: First cargo of enslaved Africans transported by Portuguese traders to European colonies.

• $1492\,\text{CE}$: Christopher Columbus makes his first transatlantic voyage aboard the Niña, Pinta, and Santa María, backed by Queen Isabella and King Ferdinand of Spain.

• $1496\,\text{CE}$: Santo Domingo founded on Hispaniola as the first permanent Spanish settlement in the Americas.

• $1500s$: Spanish ships bring the first enslaved African labor forces to Hispaniola.

• $1513\,\text{CE}$: Vasco Núñez de Balboa crosses the Isthmus of Panama and "discovers" the Pacific Ocean.

• $1517\,\text{CE}$: Martin Luther initiates the Protestant Reformation in Europe; Juan Ponce de León lands in Florida.

• $1519–1521\,\text{CE}$: Ferdinand Magellan's expedition circumnavigates the globe.

• $1519\,\text{CE}$: Hernán Cortés lands on the coast of Mexico.

• $1521\,\text{CE}$: Final conquest and fall of Tenochtitlán to Cortés and his Indigenous allies.

• $1527\,\text{CE}$: Francisco Pizarro embarks on his initial expedition down the Pacific coast toward Peru.

• $1532\,\text{CE}$: Pizarro ambushes Sapa Inca Atahualpa at Cajamarca.

• $1534\,\text{CE}$: Execution of Atahualpa; conquest of Cuzco and Quito completes the primary fall of the Inca Empire; Jacques Cartier of France explores the St. Lawrence River.

• $1535\,\text{CE}$: Central Mexico is fully brought under Spanish colonial control.

• $1539–1542\,\text{CE}$: Hernando de Soto explores the interior of North America.

• $1540\,\text{CE}$: Most of Peru is firmly under Spanish imperial control.

• $1545–1565\,\text{CE}$: Discovery of silver mines at Zacatecas (Mexico) and Potosí (Peru).

• c.\n 1570\,\text{CE}: Conclusion of the era of the Spanish conquistadors; European discovery of the ruins of Copán.

Geography of Central and South America

• Mesoamerica:

  • A historical and cultural region encompassing central and southern Mexico and the northern portion of Central America (Guatemala, Belize, Honduras, El Salvador).

• Central America:

  • An isthmus (land bridge) connecting North America to South America.
  • Borders the Caribbean Sea to the east and the Pacific Ocean to the west.
  • Comprises seven modern nations: Belize, Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua, and Panama.

• South America:

  • The fourth largest continent in the world.
  • Bounded by the Atlantic Ocean (east), Pacific Ocean (west), and Caribbean Sea (north).

• Brazil:

  • Covers nearly half of South America (fifth largest nation globally); borders all South American countries except Chile and Ecuador.
  • Named after the native brazilwood tree; official language is Portuguese due to Portuguese colonization.
  • Population concentrated along the Atlantic coastal plain ($30\%$) and urban centers; home to over $700,000$ Indigenous rainforest dwellers.

• Argentina:

  • Second largest nation in South America.
  • Regions: Gran Chaco (low forests/grasslands in north), Patagonia (barren plateaus in south), and the Pampa/Pampas (fertile temperate grasslands home to major cattle ranches and $70\%$ of the population).

• The Amazon River:

  • Originates at the confluence of the Ucayali ($\text{ooh-cah-yah-lee}$) and Marañón ($\text{marn-yeown}$) Rivers in northern Peru, flowing east into the Atlantic Ocean in northern Brazil.
  • Second longest river in the world, but ranks first globally in total water discharge volume (drains over $40\%$ of South America).
  • Named in $1541$ by Spanish explorer Francisco de Orellana after encounters with female Indigenous warriors who reminded him of the Amazons of Greek mythology.
  • Amazon Basin Rainforest: Supports over $2.5\,\text{million}$ insect species, tens of thousands of plant species, $1,000+$ bird species (toucans, parrots, hummingbirds), mammals (tapir, nutria, giant anteater, monkeys), reptiles (anacondas, alligators), and fish (piranhas, electric eels capable of discharging $650\,\text{V}$ shocks).

• The Andes Mountains:

  • Longest continental mountain chain in the world, extending over $5,000\,\text{miles}$ ($8,047\,\text{km}$) along the western coast of South America.
  • Second highest mountain range in the world (after the Himalayas), averaging $12,500\,\text{ft}$ ($3,810\,\text{m}$) in height.
  • Tallest peak in the Western Hemisphere: Mount Aconcagua at $22,835\,\text{ft}$ ($6,960\,\text{m}$).
  • Contains the Altiplano, a broad high-altitude plateau in Peru and Bolivia where $50\%$ to $60\%$ of Peruvians reside.

Chapter 1: The Maya - Rainforest Civilization

• Geographic Extent & Organization:

  • Flourished between $200$ and $900\,\text{CE}$ across the Yucatán Peninsula, southeastern Mexico, Guatemala, Honduras, and Belize.
  • Maya civilization was not a single unified empire; it consisted of independent, powerful city-states (such as Copán, Tikal, Palenque, and Chichén Itzá) linked by a shared culture, religion, trade networks, and related Mayan dialects.
  • City-states formed alliances, traded, and frequently waged war against one another.

• Rediscovery and Archaeology:

  • In $1839$, American explorers John Lloyd Stephens and Frederick Catherwood investigated the jungle ruins of Copán in Honduras.
  • Their published travelogues and detailed drawings sparked worldwide scholarly and popular interest in Maya history.
  • Copán contained major plazas, temples, artistic stone carvings, and a population that reached up to $30,000$ at its height.
  • Temple of the Hieroglyphic Stairway at Copán: Features $63$ stone steps covered with over $800$ carved glyphs detailing the lineage and military triumphs of Copán's rulers.
  • Decoding the Code: Maya hieroglyphs consist of complex picture symbols representing ideas, objects, syllables, or sounds. Early computer systems in the 1960s were instrumental in breaking the hieroglyphic code.

• Architecture and Pyramids:

  • Stepped stone pyramids served as elevated platforms for temples dedicated to Maya deities.
  • Stood far above the rainforest canopy; remained among the tallest man-made structures in the Americas until the construction of the $22$-story Flatiron Building in New York City in $1902$.

• Religion, Worldview, and Pok-ta-Pok:

  • Religion governed all actions; priests determined propitious days for planting crops, declaring war, or constructing dwellings.
  • Popol Vuh: The sacred book of the Maya. According to legend, the original humans could see everything, prompting creator gods to cloud human sight and understanding so humans would not rival the divine. Human vision was described as being "like breath on a mirror."
  • Pok-ta-Pok: A sacred, ritualistic ball game played in rectangular stone courts ranging from the size of a volleyball court to larger than a football field.
  • Objective: Drive a heavy, solid rubber ball to a designated spot or through stone rings mounted high on court walls.
  • Rules: Players could not use hands or feet; they struck the ball using hips, elbows, knees, and torso while wearing leather helmets and protective padding.
  • Religious Meaning: Represented a cosmic battle between good and evil. Winners were showered with gifts (clothing and jewelry), while defeated players were frequently executed as sacrificial offerings to the gods.

Chapter 2: Maya Science and Daily Life

• Astronomy:

  • Developed precise astronomical measurements relying entirely on naked-eye observation without telescopes, computers, satellites, or the wheel.
  • Solar Year Calculation: Maya astronomers calculated the solar year to be $365.2420\,\text{days}$ long. Modern satellite technology measures the year at $365.2422\,\text{days}$.

• Dual Calendar Systems:

  • Solar Calendar (Civil): Composed of $365$ days divided into $18$ months of $20$ days each (e.g., Pop, Zip), plus a special $5$-day unlucky month (Uayeb) at year's end.
  • Sacred Round (Religious): A $260$-day calendar used by priests to schedule religious ceremonies, rituals, and agricultural milestones.
  • Dual Identity: Because every day possessed a name from both calendars simultaneously, every Maya individual had two distinct birthdays.

• Architectural Astronomy:

  • Buildings were constructed to align precisely with astronomical events.
  • Example at Chichén Itzá: During the spring and fall equinoxes, the setting sun casts a shadow along the balustrade of the main pyramid that mimics a giant serpent slithering down the stone stairs.

• Mathematics and the Concept of Zero:

  • Created a vigesimal (base-20) positional numeral system.
  • Utilized three primary symbols: a dot for $1$, a bar for $5$, and a stylized clam shell for $0$.
  • Were among the first people globally to conceptualize and utilize the number zero in complex calculations.

• Daily Life and Social Structure:

  • Agriculture: Primary occupation; main crop was maize (corn), processed into flat breads called tortillas. Also grew beans, squash, sweet potatoes, tomatoes, and pumpkins. In lowlands, constructed raised fields and irrigation canals.
  • Housing: Lived in single-room wattle-and-daub (mud and grass) huts with thatched roofs arranged inside walled family compounds.
  • Aesthetic Customs: Crossed eyes were considered a mark of beauty (parents suspended objects in front of infants' eyes); flattened foreheads were considered elite and attractive (boards were strapped to infants' soft skulls).
  • Coming of Age: At age $5$, children received symbolic markers—boys had a white bead braided into their hair, and girls had a string tied around their waist with a red shell. At age $14$, priests cut these markers off in an initiation ceremony. Boys then moved into a communal house for unmarried men until arranged marriages were negotiated by priests.

• The Classic Maya Collapse:

  • Around $800–900\,\text{CE}$, Maya urban centers were abandoned, and monument carving ceased.
  • Theories include peasant uprisings against ruling elites, widespread disease, prolonged severe drought causing famine, seismic activity, shifting trade routes, or catastrophic warfare.
  • Today, millions of Mayan-speaking descendants live throughout southern Mexico, Guatemala, Belize, and Honduras.

Chapter 3: The Aztec - Empire Builders

• Origins and the Foundation of Tenochtitlán:

  • Began as a nomadic hunter-gatherer tribe in northern Mexico, surviving on small animals, snakes, and lizards.
  • Prophecy of Huitzilopochtli (Sun/War God): Directed the Aztec to settle where they witnessed an eagle perched on a nopal cactus, holding a snake in its talons.
  • Settlement ($1325\,\text{CE}$): Discovered the predicted sign on a swampy island in Lake Texcoco in the Valley of Mexico. Founded their capital, Tenochtitlán ("the place of the prickly pear"). The eagle-and-snake motif is featured on the modern national flag of Mexico.

• Imperial Expansion and Tribute:

  • Transformed into fearsome warriors; by the early 1500s, conquered $400–500$ neighboring city-states.
  • Ruled over $5\,\text{million}$ subjects across central and southern Mexico.
  • Enforced a rigid tribute system: Conquered city-states paid regular shipments of gold, silver, jade, turquoise, food (corn, beans, peppers, squash), cotton cloth, feathers, animal hides, pottery, and captives for sacrifice.

• Mythology and the Legend of the Five Suns:

  • Aztec theology held that the cosmos had undergone four previous destruction cycles:
  1. First Sun: Inhabited by giants; destroyed by jaguars.
  2. Second Sun: Swept away by violent hurricanes.
  3. Third Sun: Destroyed by fiery volcanic rain and ash.
  4. Fourth Sun: Submerged by catastrophic global floods.
  • The Fifth Sun: The contemporary era, destined to end in catastrophic earthquakes and starvation.

• Human Sacrifice:

  • Central to Aztec state religion; believed the sun god engaged in a nightly battle against darkness and needed the vital energy (chalchiuatl) of human blood and hearts to rise each morning.
  • Captives taken in war were preferred sacrificial victims; strong enemy soldiers provided the most valued offerings.
  • Ritual Procedure: Victims were led up pyramid staircases to temple altars accompanied by heavy drumming. Priests made an incision in the chest with an obsidian blade, extracted the beating heart, burned it as incense, and threw the corpse down the pyramid steps.

Chapter 4: Tenochtitlán - City of Wonder

• Urban Design & Infrastructure:

  • Built on an island in Lake Texcoco with a population between $150,000$ and $200,000$ residents (larger than European cities of the era).
  • Connected to the mainland by three wide, raised stone causeways equipped with drawbridges.
  • Intersected by a network of dug canals served by thousands of transport canoes.
  • Chinampas ("Floating Gardens"): Raised agricultural beds built in shallow lake waters by layering lake mud and organic matter within woven reed frames, producing multiple annual harvests of corn, squash, and beans.

• Society and Education:

  • Everyday Dress: Men wore loincloths and cloaks; women wore long woven skirts, blouses, and ponchos. Marriage was symbolized by tying the bride's blouse to the groom's cloak.
  • Suburbs and Schools: Commoner boys attended local schools focusing on civic duties, moral instruction, and military training (weaponry included spears and the macuahuitl—a wooden club edged with razor-sharp obsidian blades).
  • Elite Schools: Sons of nobles were trained by priests in astronomy, statecraft, religious rituals, hieroglyphic writing, and codex illustration.

• Codices and Writing:

  • Scribes: Recorded administrative, historical, and religious data using pictograms and glyphs.
  • Codex (pl. Codices): A long, accordion-folded manuscript made from processed tree bark or deer hide. Documented tax/tribute lists, royal lineages, historical events, and ritual calendars.

• Economy and Commerce:

  • The Great Market at Tlatelolco accommodated tens of thousands of buyers and sellers daily.
  • Barter economy used cacao (chocolate) beans and standardized cotton blankets as currency.
  • Traded meats (rabbits, deer, edible hairless dogs, turkeys), fruits, pottery, sandals, textiles, wood, feathers, and enslaved persons.

• The Ceremonial Center and Moctezuma II:

  • The Great Temple (Templo Mayor): A twin-templed step pyramid nearly $100\,\text{yards}$ wide at its base and $90\,\text{ft}$ high, dedicated to Tlaloc (rain god) and Huitzilopochtli (war god).
  • Imperial Palace: Contained hundreds of rooms and employed over $1,000$ court servants.
  • Moctezuma II: Absolute monarch who assumed power in the early 1500s. Subjects were forbidden from making eye contact or exposing bare feet in his presence (he was carried on an ornate litter and walked only on laid woven mats).
  • Omen and Dread: Moctezuma's reign was unsettled by natural omens (droughts, comets, temple lightning strikes, and sightings of a weeping woman crying, "My children, we must flee far away!"), leaving the populace fearful of impending doom.

Chapter 5: The Inca - Lords of the Mountains

• Origins and Imperial Extent:

  • Originated in the Valley of Cuzco, Peru; expanded rapidly under Pachacuti beginning in $1438\,\text{CE}$.
  • By the 1530s, the Inca Empire (Tawantinsuyu) encompassed over $12\,\text{million}$ subjects and stretched over $2,000\,\text{miles}$ along South America's Pacific Coast (covering modern-day Peru, Ecuador, Bolivia, Chile, Argentina, and southern Colombia).
  • The Sapa Inca: Absolute monarch believed to be the living earthly descendant of Inti, the sun god. Held total authority over land, resources, and human life.

• Geographical Diversity:

  • Empire spanned coastal desert strips, high mountain passes in the Andes, the chilly Altiplano plateau, and dense eastern Amazonian rainforests.

• Social Organization and Daily Life:

  • Ayllu / Clan: The foundational social unit consisting of groups of families who shared land, crops, and labor.
  • Housing: Windowless, single-room fieldstone huts with thatched roofs; families burned dried animal dung for cooking fuel and slept on animal pelts on dirt floors.
  • Agriculture: The potato served as the primary stable crop (over $100$ high-altitude varieties cultivated). Also grew corn, squash, tomatoes, peanuts, and cotton.
  • Livestock:
  • Guinea pigs: Raised indoors as a primary source of meat.
  • Alpacas: Raised for their fine, long woolly fleece used in high-grade textiles.
  • Llamas: Versatile pack animals capable of carrying $125\,\text{lbs}$ for $15–20\,\text{miles}$ daily. Provided coarse wool, hides, fertilizer/fuel, and meat. Sun-dried llama meat strips (charqui) are the historical origin of modern meat jerky.

• Imperial Administration and the Mita:

  • Labor Tax (Mita): Citizens paid taxes through mandatory labor service—farming state fields, working on stone quarries/roads, weaving textiles, or serving in the military.
  • State Welfare System: Agricultural yield and goods were divided three ways: one share for the Sapa Inca, one for the priesthood/gods, and one retained by the clan. State storehouses (qullqas) redistributively provided food and clothes to the elderly, widowed, sick, or regions hit by crop failures.
  • He-Who-Sees-Everything: Imperial inspectors who traveled to villages to take censuses (counts of population), collect mita labor taxes, enforce royal decrees, and select marriage partners for young adults.

Chapter 6: Inca Engineering

• The Royal Road Network:

  • Constructed over $14,000\,\text{miles}$ of paved highways spanning the empire, anchored by the $2,000$-mile Royal Road (Qhapaq Ñan) along the Andes.
  • Built entirely by hand without draft animals, iron tools, or the wheel.
  • Features: $24\,\text{ft}$ wide in valleys, carved into steep cliff faces, flanked by shade trees, drainage canals, and roadside inns/storage depots (tambos).
  • Ashlar Masonry: Fitted massive stone blocks together without mortar; cut so precisely that a knife blade could not slide between stones. Highly resistant to seismic shocks.

• Suspension Bridges:

  • Spanned deep river gorges and ravines in the Andes.
  • Woven from thick cables of mountain grass, vines, and willow branches anchored to stone piers.
  • Example: The Apurímac River Bridge built in $1350\,\text{CE}$ was continuously maintained and rebuilt every two years by local communities until $1890\,\text{CE}$ ($540$ years of service).

• Terraced Agriculture and Irrigation:

  • Carved stone steps (andenes) into steep mountain slopes to create flat, farmable plots.
  • Retaining stone walls absorbed solar heat by day to prevent crops from freezing at night.
  • Engineered stone aqueducts to transport glacier meltwater to hillside crops.

• Communication and Record Keeping:

  • Lacked a formal written alphabet.
  • Quipu: A complex record-keeping device consisting of a primary cord with varied color-coded branch strings hanging from it. Knots tied at specific intervals denoted numbers, inventory counts, military forces, and tribute data.
  • Chasquis: Specialized relay runners stationed at regular posts along the road network. Messages were passed verbally from runner to runner, moving at speeds of up to $150\,\text{miles}$ per day (allowing news to travel from Quito to Cuzco in approximately one week).

• Machu Picchu:

  • Royal estate and mountain retreat built for the Sapa Inca around $1450\,\text{CE}$ at an elevation of $7,000\,\text{ft}$ in the Andes, northwest of Cuzco.
  • Featured terraced fields, residential stone sectors, central plazas, and stone temples aligned with solar solstices.

• Imperial Expansion Policies:

  • Conquered groups were integrated into the empire; taught the official Quechua language and solar worship (Inti), while allowed to maintain local deities.
  • Disloyal or rebellious populations were subjected to forced relocation (mitma), moved to loyal regions surrounded by reliable Inca subjects.

Chapter 7: The End of Two Empires

• The Conquest of the Aztec Empire ($1519–1521\,\text{CE}$):

  • In $1519\,\text{CE}$, Hernán Cortés landed on the Mexican coast with approximately $500$ Spanish soldiers, 11 ships, horses, and cannons.
  • Moctezuma II hesitated to attack, suspecting Cortés might be the returning god Quetzalcoatl; he sent lavish gifts of gold and turquoise robes.
  • Cortés formed alliances with native groups oppressed by the Aztec (particularly the Tlaxcalans) and utilized an Indigenous noblewoman, Marina (La Malinche), as his interpreter.
  • Entering Tenochtitlán, the Spanish took Moctezuma II hostage within his own palace. Fighting broke out after Spaniards massacred unarmed Aztec priests during a festival.
  • The Aztec revolted (La Noche Triste); Moctezuma II was killed, and the Spanish suffered heavy casualties while retreating from the city.
  • Smallpox Epidemic: European germs swept through Tenochtitlán, killing thousands of Aztec warriors, commoners, and leaders who lacked biological immunity.
  • Final Fall ($1521\,\text{CE}$): Cortés regrouped, assembled a force of tens of thousands of Indigenous allies, blockaded Tenochtitlán with armed brigantines on Lake Texcoco, and starved the city. Tenochtitlán fell in August $1521\,\text{CE}$.

• The Conquest of the Inca Empire ($1531–1534\,\text{CE}$):

  • Smallpox preceded the arrival of Spanish soldiers, killing Sapa Inca Huayna Capac and triggering a civil war between his sons, Huáscar and Atahualpa.
  • Atahualpa defeated his brother to seize the throne.
  • In $1532\,\text{CE}$, Francisco Pizarro landed on the Peruvian coast with $160$ conquistadors and horses, marching along Inca roads to Cajamarca.
  • The Ambush at Cajamarca: Atahualpa met Pizarro in the city plaza accompanied by $6,000$ unarmed attendants. Spanish friar Vicente de Valverde presented a prayer book and urged Atahualpa to convert to Catholicism. When Atahualpa discarded the book, Pizarro ordered a hidden ambush. Spanish cannons, cavalry, and steel swords massacred thousands of unarmed Inca and captured Atahualpa.
  • The Atahualpa Ransom: Atahualpa offered to fill a large prison room once with gold and twice with silver to arm-reach height. The Inca collected tens of millions of dollars in precious metals from state temples and storehouses.
  • Treachery and Execution: After receiving the ransom, Pizarro reneged on his promise, tried Atahualpa on false charges of treason, and executed him by strangulation in $1533\,\text{CE}$.
  • Collapse: Weakened by civil war, smallpox, and leadership loss, Inca resistance faltered. Pizarro captured Cuzco and Quito in $1534\,\text{CE}$, bringing the Andes firmly under Spanish imperial control.

Key Vocabulary Reference Glossary

• Mesoamerica: A historical cultural region including central and southern Mexico and northern Central America.
• Maya: Indigenous peoples who inhabited Mesoamerica from ancient times to the present, whose Classic civilization peaked between $200$ and $900\,\text{CE}$.
• Civilization: A complex society characterized by urban centers, shared religious beliefs, social stratification, organized government, and common language/writing.
• Architecture: The style, design, and construction of buildings and physical structures.
• Archaeologist: An expert who studies ancient human societies by examining remaining artifacts, stone structures, and biological remains.
• City-State: An independent political state consisting of an urban center and its surrounding territory with its own ruling government.
• Temple: A building or structure dedicated to religious worship or sacred rituals.
• Hieroglyph: A written symbol or picture representing an object, idea, syllable, or sound.
• Sacrifice: The ritual offering of goods, animals, or human lives to deities for religious purposes.
• Astronomy: The scientific study of stars, planets, and celestial phenomena.
• Leap Year: A calendar year containing $366$ days occurring once every four years to adjust for the Earth's orbit.
• Equinox: Two annual days when day and night are of equal duration worldwide.
• Initiation Ceremony: A formal ritual marking an individual's transition to a new social status or adulthood.
• Priest: A religious official authorized to perform sacred rites and mediate with the divine.
• Aztec: A Mesoamerican civilization that controlled central Mexico from $1325$ to $1521\,\text{CE}$.
• Nomadic: A lifestyle characterized by moving frequently from place to place in search of food and resources.
• Empire: A major political unit in which a single sovereign monarch or government rules over distinct territories and diverse populations.
• Emperor: The supreme monarch ruling an empire.
• Causeway: A raised stone roadway built across a body of water or wetland.
• Canal: A man-made waterway constructed for navigation, transport, or field irrigation.
• Scribe: A trained professional responsible for writing, copying, and maintaining official documents.
• Codex (pl. Codices): An ancient handwritten manuscript composed of accordion-folded bark paper or pelt.
• Pictogram: A simplified drawing or picture that visually represents a word, phrase, or concept.
• Litter: A ceremonial chair or throne mounted on side poles and carried on human shoulders.
• Reign: The period of time during which a sovereign monarch holds power.
• Inca: The civilization that dominated the Andes region of South America from $1438$ to $1532\,\text{CE}$.
• Conquistador: A 16th-century Spanish explorer-soldier who conquered native empires in the Americas.
• Geographical Diversity: The presence of varied physical landforms, climates, and ecosystems within a single region.
• Plateau: A broad, elevated area of land that is relatively flat on top.
• Clan: A extended kinship network or group of families sharing land and heritage.
• Alpaca: A South American camelid domesticated primarily for its long, fine woolly fleece.
• Llama: A strong South American camelid used as a beast of burden, as well as for wool, meat, and fuel.
• Census: An official demographic count of a region's population.
• Official: An appointed government representative tasked with executing administrative duties.
• Engineer: A professional who applies mathematical and scientific principles to design and construct roads, bridges, and infrastructure.
• Mortar: A wet cement mixture used in masonry to bind building stones together.
• Suspension Bridge: A bridge structure whose roadway is hung from anchored heavy cables or ropes.
• Terrace: A flat, stepped plot carved into a hill or mountain slope for agricultural cultivation.
• Expedition: A organized journey undertaken by a group with a specific purpose or objective.
• Religious Ceremony: A formal gathering held to conduct sacred rituals and honor deities.
• Smallpox: A highly contagious, viral disease characterized by severe fever, prostration, and pustular skin rashes.
• Immunity: The biological capacity of an organism to resist a specific infection or disease.
• Epidemic: A rapid, widespread outbreak of an infectious disease affecting a large population within a region.