9C: "Minerals as a Resource"

A company is likely to mine a site if the site

• is rich in minerals

• contains gold

• contains minerals that can be extracted economically

• does not contain gangue minerals

___ are pure substances that cannot be broken down into simpler substances by ordinary chemical means.

• Minerals

• Compounds

• Crystals

• Elements

Which of the following statements about minerals is FALSE?

• Minerals have a crystalline structure.

• Humans can create minerals to suit specific needs.

• Minerals are inorganic materials.

• Minerals cannot be liquids or gases.

_____________ often form at bends in a river where the water flows more slowly and heavier materials are likely to settle out.

• Dredges

• Placer deposits

• Seams

• Fans

The most abundant family or class of minerals in the earth’s crust is the ____________.

• silicates

• sulfides

• oxides

• nonmetals

Minerals more commonly known as salts are called ______________________.

• silicates

• oxides

• carbonates

• halides

Minerals made of one carbon atom and three oxygen atoms.

• silicates

• oxides

• carbonates

• halides

This is where most ores are found.

• silicates

• oxides

• carbonates

• halides

Aluminium is a member of this family.

• silicates

• oxides

• carbonates

• halides

This compound mineral is made of one or more metal elements and sulfur.

• halides

• oxides

• sulfides

• silicates