cataract
a waterfall or rapids in a river.
delta
a fan-shaped area pf silt near where a river flows into the sea.
shadoof
a bucket attached to a long pole used to transfer river water to storage basin.
papyrus
a reed plant that grew wild along the Nile.
hieroglyphices
a writing system made up of a comb of pictures and sound symbols.
dynasty
a line ruler from one family.