Answer: bronzeage

AnswerCrossword Clue
BRONZEAGEMeasured amount of a copper-tin alloy?
BRONZEAGEPeriod marked by copper use
BRONZEAGEWhen the Mycenaean civilization started
BRONZEAGEArcheological period
BRONZEAGEThe wheel was invented during it
BRONZEAGEPeriod dating from 3500 B.C.
BRONZEAGEHistorical period.
BRONZEAGEPeriod beginning circa 3500 B.C.
BRONZEAGESumer's era
BRONZEAGEEarly period of civilization
BRONZEAGEEarly toolmaking period