Chapter 4

Question 1

Gem

Answer 1

Valuable minerals that are prized for their rarity and beauty. They are very hard and scratch resistant.

Question 2

Ore

Answer 2

A mineral that someone can make money from mining and selling.

Question 3

Sulfides

Answer 3

A group of minerals composed of sulfur and one more additional elements; pyrite .(iron and two sulfur elements)

Question 4

Oxides

Answer 4

A group of minerals composed of oxygen and a metal. For example, hematite (2 irons and 3 oxygen) and magnetite (3 irons and four oxygen)

Question 5

Carbonates

Answer 5

A group of minerals made of carbon, oxygen and a metallic element. They are found in marble and limestone, in addition to other materials

Question 6

Tetrahedron

Answer 6

Shape created by four equilateral triangles

Question 7

Silicates

Answer 7

Group of minerals composed of oxygen, silicon and often additional elements. The oxygen and silicon form tetrahedrons. Largest group of minerals - 96%.