Why is the Chalcolithic period not called the 'Bronze Age'?

Because while they used copper, they had not yet mastered the widespread alloying of copper with tin to create bronze, which was a hallmark of the later Harappan civilization.

Prehistoric Tool Technology

UPSC Archival Analysis

Q: Which one of the following periods is also known as the Chalcolithic Age?

The Chalcolithic Age is also known as the Copper Age, characterizing a period where humans used both stone and copper tools.

Exam Year

2000

Evidence Source

Link

ID: HIS_ANC_2000_162 Ref: Standard Educational Reference