WORLD CIVILIZATION

Detailed explanation-1: -Ancient Sumer may have been the first civilization to start adding tin to copper to make bronze. Bronze was harder and more durable than copper, which made bronze a better metal for tools and weapons.

Detailed explanation-2: -The Bronze Age was the time from around 2, 000BC to 700BC when people used bronze. In the Stone Age, flint was shaped and used as tools and weapons, but in the Bronze Age, stone was gradually replaced by bronze. Bronze was made by melting tin and copper, and mixing them together.