Fill in the Blanks Metal AgesOnline version Text about Metal Ages by Susana L贸pez 1 warriors social copper metal plough land ships 7000 bronze wealth unequally divisions iron progress traders trade changes transport cities Wheel sail strong routes jewellery About years ago , human beigns began to make objects . The first metal they used was , but it was not very . Later , they used and to make tools , weapons and . There were three important inventions : - The , which greatly improved . - The , which meant than could be bigger because they used the force of the wind . - The , which made working the easier and faster . The use of metal objects was a sign of great , and caused many . The search of metals to make tools created new . Trade produced , and villages turned into . New professions , such as , craftspeople , priest and appeared . Wealth was divided , and were created .
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