2. Aqueduct Aqueduct -a bridge-like structure that carries a water conduit or canal across a valley or over a river. Aqueduct -a bridge-like structure that carries a water conduit or canal across a valley or over a river.

4. Cuniform Cuniform-having the form of a wedge; wedge-shaped. Cuniform-having the form of a wedge; wedge-shaped. Example of cuniform writing:Example of a cuniform tablet.

6. Drought Drought -a period of dry weather, esp. a long one that is injurious to crops. Drought -a period of dry weather, esp. a long one that is injurious to crops.

8. Irrigation Irrigation - the artificial application of water to land to assist in the production of crops. Irrigation - the artificial application of water to land to assist in the production of crops.

10. Levee Levee - an embankment designed to prevent the flooding of a river. Levee - an embankment designed to prevent the flooding of a river.

12. Polytheism Polytheism -The worship of or belief in more than one god. Worshipper statues

14. Scribe Scribe - a person who serves as a professional copyist, esp. one who made copies of manuscripts before the invention of printing. Scribe - a person who serves as a professional copyist, esp. one who made copies of manuscripts before the invention of printing. Scribes created the wedge shapes which made cuneiform signs by pressing the stylus into a clay or wax surface. Scribes created the wedge shapes which made cuneiform signs by pressing the stylus into a clay or wax surface.

16. Reed Stylus Reed Stylus - A reed stylus was the main writing tool used by Mesopotamian scribes. reed stylusreed stylus

18. Silt Silt - earthy matter, fine sand, or the like carried by moving or running water and deposited as a sediment. Silt - earthy matter, fine sand, or the like carried by moving or running water and deposited as a sediment.

20. Ziggurat Ziggurat: a multi-storied temple tower from ancient Mesopotamia. Ziggurats are, architecturally, the Mesopotamian equivalent of the Egyptian pyramids: large artificial square mountains of stone Ziggurat: a multi-storied temple tower from ancient Mesopotamia. Ziggurats are, architecturally, the Mesopotamian equivalent of the Egyptian pyramids: large artificial square mountains of stone Mesopotamian

22. Erosion Erosion -the process by which the surface of the earth is worn away by the action of water, glaciers, winds, waves, etc. Erosion -the process by which the surface of the earth is worn away by the action of water, glaciers, winds, waves, etc.

24. Empire Empire -a group of nations or peoples ruled over by an emperor, empress, or other powerful sovereign or government: usually a territory of greater extent than a kingdom Empire -a group of nations or peoples ruled over by an emperor, empress, or other powerful sovereign or government: usually a territory of greater extent than a kingdom

25. City-state City-state -A city-state is a region controlled exclusively by a city, and usually having sovereignty. Historically, city-states have often been part of larger cultural areas. City-state -A city-state is a region controlled exclusively by a city, and usually having sovereignty. Historically, city-states have often been part of larger cultural areas.city sovereigntycity sovereignty