1 jan 1775 ano antes da era comum - Iron
Descrição:
- extracted by calcination and then smelting iron ore
- calcination is when the iron ore is heated in the absence of air (oxygen)
-Discovered in the Bronze Age. The Bronze Age is a historical period characterized by the use of bronze. Bronze is a mixture of mainly copper and tin. Bronze is malleable meaning it is easy to mould into tools and weaponry.
-Iron is used to manufacture steel, used in engineering ( for example reinforced concrete) and in manufacturing.
Iron has to be blasted and chemically extracted to be pure.
Adicionado na linha do tempo:
Data:
1 jan 1775 ano antes da era comum
Agora
~ 3801 years ago
Imagens: