This happens when there has not been enough rain, causing crops to die.
Drought
A place that allowed for lots of different work
Advanced city
Mesopotamians discovered it was best to live by a ?
River or source of water
These are the two rivers Mesopotamians used to live off of.
Tigris and Euphrates
Someone with a special skill such as potters, jewelry makers, and builders
Specialized worker
First civilization
Sumer, in Mesopotamia
Having extra which allows others to trade
Surplus
Keeping track of things in a city
record keeping
Center of a Sumerian city
ziggurat
This was part of the irrigation system which allowed water to flow into crops
Canal
Better ways of doing things
technology
Mesopotamia lacked these resources
wood and metal
Mesopotamians invented this:
Irrigation system and a complex city
Groups of people that specialize in specific work to help their city and society
complex institution
Early houses were made of this material
Mud