Thor
Loki
Odin
Freya
Balder
100
An explosive mixture invented in China, made of saltpeter, sulfur, and charcoal.
Gunpowder
100
Navigational tool that uses Earth’s magnetic field to show direction; revolutionized sea travel.
Compass
100
Scandinavian people of the Viking Age, skilled in sailing and navigation.
Norse
100
Seafarers from Scandinavia known for exploration, trade, and raiding during the Middle Ages.
The Vikings
100
King of the Franks who united much of Western Europe and promoted Christianity.
Charlemagne
200
Religious wars between Christians and Muslims over control of the Holy Land.
The Crusades
200
Arctic island populated by pre-Inuit people, colonized by Norse settlers.
Greenland
200
A social system in medieval Europe based on land exchanged for loyalty and military service.
Feudalism
200
Detailed survey of England’s land and wealth commissioned by William the Conqueror.
Domesday (DOOMSDAY!!) Book
200
Conflict in 1066 that led to Norman (Viking) rule over England.
Battle of Hastings
300
Christians who follow the Pope and western church traditions.
Roman Catholics
300
Eastern Roman Empire centered in Constantinople; lasted until 1453 CE.
Byzantine Empire
300
Chinese dynasty (960–1279 CE) known for advancements in technology and government.
Song Dynasty
300
A method of printing in which text or images are carved into wooden blocks, inked, and pressed onto paper; widely used in China during the Song dynasty.
Woodblock printing
300
Tests used in imperial China to select government officials based on Confucian learning.
Civil service exams
400
Norse explorer who founded the first settlement in Greenland.
Erik the Red
400
Also known as William the Conqueror; won the Battle of Hastings in 1066.
William of Normandy
400
Christians who follow Eastern church traditions; split from Roman Catholics in 1054.
Orthodox Christians
400
Muslim military leader who recaptured Jerusalem during the Crusades; famous for his chivalry.
Saladin
400
English king and military commander during the Third Crusade. (also had a starring role in Disney's "Robin Hood." 
Richard the Lionheart
500
A time of warmer climate in parts of the Northern Hemisphere c. 950 to 1250 CE.
Medieval Warm Period
500
An island in the North Atlantic settled by Norse explorers around the 9th century.
Iceland
500
Son of Erik the Red, who sailed to North America around 1000 CE and explored Vinland (which is the Norse name for what is likely in present-day Newfoundland.)
Leif Eriksson
500
Fast, narrow Viking boats with sails and oars, designed for both ocean and river travel.
Longships
500
Crowned Charlemagne as Holy Roman Emperor, strengthening ties between church and state.
Pope Lee III