| A | B |
|---|
| oasis | watered by underground springs |
| desert | dry area found in the inner part of Arabian Peninsula |
| Nabatean civilization | grew rich because it was a busy trade route |
| caravan | a group of people and animals traveling together |
| Mecca | center of the Muslim world community |
| Avicenna | a doctor who described how some diseases spread |
| Quran | a book that contains Allah's teachings |
| five pillars | five basic duties of all Muslims |
| mosque | place of worship for Muslims |
| Islam | religion of Muslim people |
| Mecca | city where Muhammad began his teachings |
| caliphate | lands ruled by the caliph (person who governed the land) |
| major achievements of the caliphate | improved medical practices, Arabic numbers, algebra, improved astrolabe |
| astrolabe | an instrument used to figure out star position |
| Kaaba | temple in Mecca |
| pilgrimage | journey made for religious reasons |
