Ores mined from the earth are usually contaminated with large amounts of impurities such as soil, sand, etc. They are called ____________.

Ores mined from the earth are usually contaminated with large amounts

1.	Ores mined from the earth are usually contaminated with large amounts of impurities such as soil, sand, etc. They are called ____________.
Answer» Ores mined from the earth are usually contaminated with large amounts of impurities such as soil, sand, etc. They are called ____________.

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Ores mined from the earth are usually contaminated with large amounts of impurities such as soil, sand, etc. They are called ____________.

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