Quiz No. 3 Q1 L3&4 Minerals and Rocks

Which of the following mineral characteristics refers to the tendency to break along very smooth surfaces?

• A. Cleavage

• B. Color

• C. Hardness

• D. Luster

Quartz are composed of silicon and oxygen. Which common group of minerals do quarts belong?

• A. Oxide

• B. Sulfide

• C. Sulfate

• D. Silicate

Gypsum, also known as dessert rose, has a chemical name of Calcium sulfate dehydrate. To which group of rock-forming mineral does it belong?

• A. Oxides

• B. Silicates

• C. Sulfates

• D. Sulfides

Which group of minerals do common table salts belong?

• A. Carbonates

• B. Fluorites

• C. Halides

• D. Sulfide

Which of the following is NOT a physical property of minerals?

• A. Crystal Habit

• B. Luster

• C. Reactivity

• D. Streak

Scientists use a scale of 1-10 to show the hardness of a mineral. What number would be given to the hardest?

• A. 1

• B. 5

• C. 6

• D. 10

Which is the hardest mineral?

• A. Calcite

• B. Diamond

• C. Quartz

• D. Talc

Which of the following is NOT a characteristic of a mineral?

• A. Naturally occurring

• B. Homogenous solid

• C. Organic

• D. Definite composition

How is coal best classified?

• 1. A. As a rock but not a mineral

• B. As a mineral but not a rock

• 1. C. As both a rock and a mineral

• D. As neither a rock nor a mineral

A man finds a rock on a beach and asks his geologist friend to identify a white mineral crystal in it. The man sends his friend a photograph, but the geologist says that she can’t tell from the picture and instructs him to try scratching the crystal with a knife. What property is the geologist trying to examine?

• A. Luster

• B. Fracture

• C. Hardness

• D. Specific gravity