What the major river that was in Ancient Egypt: Nile. Egyptians had a written language using pictures. It was called ____________: hieroglyphics. What was a MAJOR purpose for building the pyramids: tombs for pharaohs when they died. What was the burial practice of Egyptians: They preserved bodies as mummies.. Why was it so important that the Nile River flooded: Rich soil was left behind after the flood lowered.. Ancient Egyptians believed in polytheism which means they:: believed in many gods. What is a pharaoh: A ruler. How did Egyptians get water to their crops: Irrigation. Why did the ancient Egyptians mummify people: to preserve their bodies for the afterlife. A body that has been preserved for the afterlife is a..: mummy