Chapter 22: Minerals

Pataasin ang iyong marka sa homework at exams ngayon gamit ang Quizwiz!

Of over 4,000 minerals known, how many are common?

20

The hardness of glass is

5.5

The common minerals combine in different numbers to form over

90% of all the rocks in the Earth's crust

The building block of all silicate minerals is

SiO4

A mineral is called an ore if it contains a useful metal that can be sold for a profit, true or false?

True

Fracture can be said to mean that a mineral does not split apart evenly, true or false?

True

Oxides are important ores of iron, true or false?

True

Which one of the following is a carbonate?

calcite

Minerals that break through planes of weakness have a characteristic called

cleavage

One of the following is not used to identify minerals.

color

This mineral is made up of a pure element.

copper

It is possible for minerals to form on the Earth's surface if

crystallization is delayed

Minerals can form deep inside the Earth's crust by

crystallization of melted materials

The ability of a mineral to transmit light is

diaphaneity

Halite can be formed by

evaporation

Some minerals that break irregularly have a characteristic called

fracture

Which one of the following minerals is a sulfate?

gypsum

The ability of a mineral to scratch or resist scratching by other substances is

hardness

A mineral is inorganic, which means that it contains

inorganics

Ferromagnesian minerals contain

iron and magnesium

Halite has a crystal shape called

isometric

Which of the following describes a mineral?

it has a definite chemical composition

Muscovite belongs to which of the following groups of rock-forming silicates?

mica group

Which one of the following is not an oxide?

muscovite

Which one of the following is not a group of common rock-forming silicates?

nitrates

Three common varieties of potassium feldspar are

orthoclase, sanidine, and microcline

Which is the most abundant element in the Earth's crust?

oxygen

Apatite belongs to which one of the following classes of rock-forming minerals?

phosphates

Which one of the following minerals is a sulfide?

pyrite

Augite is the most common variety of

pyroxene

Which one of the following minerals is attracted by a magnet?

pyrrohtite

Which of the following minerals is the hardest?

quartz

The most abundant group of rock forming minerals is

silicates

The color of a mineral's powder is called its

streak

Which of the following is a minor property of minerals?

striation, feel, odor, double refraction

The softest mineral on the Mohs hardness scale is

talc

Which one of the following is not a major property of minerals?

taste

There are so many substances in the Earth's crust, but not all of them are minerals because

they are organic

Which one of the following is not one of the most abundant elements that combine to form minerals?

titanium

Which is a factor that affects the size of mineral crystallizing from magma?

whether it is being formed from magma or lava where it is being formed, (surface or subsurface) rate of cooling


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