Across
- 4. watering crops by channeling water from rivers or streams
- 6. a form of government in which people choose representatives to govern them
- 8. extra
- 9. thick sheets of ice
- 11. the science of locating the position and plotting the course of ships
- 14. a system in which a ruler grants parts of his land to lords
- 16. areas regions in which groups of people have a similar way of life
Down
- 1. founder of the Islam religion
- 2. sun-dried brick
- 3. an advanced culture in which people have developed cities, science, and industries
- 5. groups of families that were related to one another
- 7. the idea that there is only one God
- 8. everlasting life
- 10. a ceremony at which the hosts showered their guests with gifts
- 12. a Jewish teacher who many believe is the Messiah
- 13. small boats made from skins
- 15. tribal chief
