Most metals are obtained by chemically removing them from

ores

Explanation:

Metals are present in nature in rocks, always with combination of other elements and for using them they go a process of separation.

Ores are the rocks from which workers extract metals.

Bauxite is one of the most common ores, from which Aluminium is obtained. Oxides and sulphides are common metals

, like aluminium silver and copper are found in great quantity in Earths crust, along minerals.

There are four types of ores according to their chemical structure:

Oxides, Carbonate ores, Sulphides, and Halides ores.

A list of important metals and their ores is shown in the table:

so they can differentiate themselves from others as they saw themselves as the superior race. the star was basically a symbol that meant you are a less of a person than i am because of my race. the star was also degrading for those who had to wear it because they were aware of this and the nazis used the notion to make them feel less like a person.