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:

- "the civil rights movements"

- "following the american civil war and abolition of slavery, the united states entered a period known as reconstruction, during which black americans continued to suffer from disenfranchisement, racial segregation, and economic oppression. beginning in the early 1950's, black americans launched a series of major campaigns of civil resistance, emphasizing the need for nonviolent protests and civil disobedience."

"such as the montgomery bus boycott of 1955-56, a campaign launched by rosa parks against the policy of racial segregation of the public transit system in alabama. “sit-ins” became popular across the american south, particularly in greensboro, north carolina, increase national sentiment."

- "the counterculture movement"

- "counterculture began to develop in the united states following the rise of conformity in american culture during the 1950s. by 1963, youth, particularly those of the white middle class, began rejecting the cultural standards and normality of their parents, opting for progressive attitudes instead. the movement gained momentum as the civil rights movement became increasingly successful and as the u.s. military intervention of vietnam began to take a negative turn."

"hippie counterculture moved further into popular culture following the summer of love in 1967 when thousands of people came together in the haight-ashbury neighborhood of san francisco. along with greenwich village in new york city, haight-ashbury became a hub for the counterculture movement."