When did metal working first develop?
Metal working seems to have been developed independently in several places in about 3500Bc.
It appeared in China, India, Egypt and Mesopotamia at around this time. Bronze was the first metal to be worked.
Why did the Egyptian civilization develop?
The Egyptian civilization grew up as a result of the annual flooding of the River Nile. This provided a green and fertile strip of land that could be cultivated, even in an area that is mostly desert. Every year, when the Nile flooded, it deposited rich, fertile silt along its banks. The ancient Egyptians grew crops of barley, wheat and flax in the fertile soils. They used the flax to make linen for their clothes.
The river also provided the Egyptians with papyrus reed. They harvested the reed and used it to make a form of paper known as papyrus. It was easy to keep detailed written records on papyrus.
Pictures Credit: Google