| A | B |
| Bedouin | Arab nomads |
| Mecca | holy city of Islam |
| Kaaba | religious shrine |
| Mohammed | Born in Mecca around 570 |
| Khadija | Mohammed's wife |
| Gabriel | angel who came to Mohammed |
| Monotheistic | belief in one God |
| Islam | surrender to Allah |
| Allah | Arabic word for God |
| Muslims | followers of Islam |
| Koran | the holy book of Islam |
| prophet | messenger of God |
| moral code | Must be followed to reach paradise |
| Five Pillars of Islam | religious duties of Islam |
| The fate of Muslim sinners | bitter fruit and boiling water |
| Hegira | the flight of Mohammed and his followers |
| 622 | year one of the Muslim calendar |
| Jihad | holy war |
| Abu Bakr | became leader after Mohammed |
| calif | political and religious head of a Muslim state |
| Umayyad | family of Muslim rulers |
| Sunni | supported the Umayyad family |
| Shiites | challenged the Umayyads |
| Islamic Empire | became larger than the Roman Empire |
| Battle of Tours | stopped the Muslim advance into Europe |
| Baghdad | capital of Muslim world |
| Mongols | defeated the Islamic Empire |