Chapter 3 - Minerals

Which item is NOT a mineral?

• a perfect salt crystal
• a shell made by a sea animal
• a diamond made in a laboratory

A crystal forms when atoms join

• randomly
• in a repeating pattern
• as a result of organic processes

A silicate is 

• any natural mineral on Earth
• a mineral made of only one element
• a mineral that contains silicon and oxygen

Which mineral has a metallic luster?

• gold
• quartz
• diamond

Aluminum is an important _____ ore.

• crystal
• metallic
• nonmetallic

Which property of quartz makes it useful as an ingredient of sandpaper?

• luster
• streak
• hardness

How are most diamonds used?

• as abrasives and gemstones
• in construction and fertilizers
• in ceramics and steel production

Which statement about mineral is NOT true?

• They have a definite chemical conposition
• they have a crystalline form
• they are made of inorganic matter
• they form only from hot or cool solutions

_____ are the main rock-forming minerals

• Sulfides
• Silicates
• Carbionates
• Native elements

What determines a mineral's luster?

• its streak
• the shape of its crystals
• its chemical compostition
• the way in which it forms