The term pharaoh is used for the first time to describe the absolute ruler of Egypt. The pharaoh then divided Egypt into provinces. A province is just another way of saying a state. The reason why the pharaoh did this was for tax purposes. Each province had official tax collectors.
During the Old Kingdom, engineering improved. This was the time of pyramids. This is the only time in the history of Egypt that pyramids were built.
Pile on the Nile Bonus Worksheet
Another engineering marvel was in the area of irrigation. The only good land was the land close to the Nile. After awhile all the good land was taken and the population was growing. Building trenches away from the Nile made more land. To water the crops, the Egyptians made a counterweight called the Shadoof. The Shadoof used the weight of the water vs. the weight of rocks to swing the water in mass quantities.
In the end the pharaohs were too greedy. Taxes kept rising and tolerance was lowering. The Egyptians revolted and started a time period called the First Intermediate Period. This period lasted for 150 years. No strong ruler emerged.