Day 2 Pre-test

Question 1

It is defined as the pervasive planar structure that results from the nearly parallel alignment of sheet silicate minerals and/or compositional and mineralogical layering

Answer 1

Gneissosity

Question 2

If glass is altered to secondary minerals, what takes place?

Answer 2

Devitrification

Question 3

Which of the following is not considered as a mineral? (Anorthite, Anorthosite, Bytownite, Labradorite)

Answer 3

Anorthosite

Question 4

The color index of an igneous rock expresses its content of:

Answer 4

Silica

Question 5

Choose from the following list a contact metamorphic rock: (Gneiss, Schist, Phyllite, Granulite, Marble)

Answer 5

Marble

Question 6

Structural and mineralogical changes occuring in metamorphic processes take place in an essentially what state?

Answer 6

Solid

Question 7

Structural and mineralogical changes occuring in metamorphic processes take place in an essentially what state?

Answer 7

Solid

Question 8

Limestone composed primarily of shell fragments are classified as:

Answer 8

Coquina

Question 9

“Clean Sandstones” that are well-sorted and with little to no clay matrix are called:

Answer 9

Arenites

Question 10

“Dirty” Sandstones containing

Answer 10

Wackes

Question 11

Refers to the mass per unit volume

Answer 11

Density

Question 12

The resistance of a mineral to breaking, crushing, or bending

Answer 12

Tenacity

Question 13

Cavity in a rock filled with secondary minerals

Answer 13

Amygdule

Question 14

More than 90% of the Earth’s crust is made of:

Answer 14

Oxygen

Question 15

Which of the following is least common in the Earth’s crust? (Silicon, Oxygen, Hydrogen, Aluminum)

Answer 15

Hydrogen

Question 16

The second most common element in the Earth’s crust is:

Answer 16

Silicon

Question 17

Kaolinite and other clay minerals fall into which of the silicate mineral groups?

Answer 17

Sheet Silicates (Phyllosilicates)

Question 18

Which of the following minerals is not usually produced by weathering? (Magnetite, Hematite, Limonite, Kaolinite)

Answer 18

Magnetite

Question 19

Formation of sulfur in vents of volcanoes is an example of crystallization from?

Answer 19

Vapor

Question 20

This refers to changes in chemical composition of rocks brought about by surficial processes:

Answer 20

1) Alteration
2) Supergene enrichment
3) Weathering

Question 21

This refers to conduits which serve as plumbing systems during mineral deposition

Answer 21

1) Fractures
2) Joints
3) Faults

Question 22

Name the mineral district in the northern part of Luzon Central Cordillera where the meineral Luzonite was discovered:

Answer 22

Mankayan Mineral District

Question 23

A metal with very high melting point and is used in the exhaust of jetplanes

Answer 23

Nickel

Question 24

A crystal system defined by the presence of e unequal axes all perpendicular to each other

Answer 24

Orthorhombic

Question 25

______ minerals are alteration products of primary minerals

Answer 25

Secondary

Question 26

Extreme under-cooling of magma is inferred if the igneous rock contains abundant ______

Answer 26

Tridymite

Question 27

A crystal system where the three crystallographic axes are equal in length and intersect at right angles to each other

Answer 27

Isometric

Question 28

In aplitic textures, almost all the mineral grains are

Answer 28

Subhedral

Question 29

A porphyritic texture where the groundmass is glassy

Answer 29

Vitrophyric

Question 30

Identify the textural term applicable to a rock where the quartz-feldspar intergrowth resembles cuneiform writing

Answer 30

Graphic

Question 31

A regular, polyhedral form bounded by smooth faces and has an ordered atomic arrangement is called:

Answer 31

Crystal

Question 32

The color of the thin surface film of material which forms as a result of exposure to the atmosphere

Answer 32

Tarnish

Question 33

Which of the following is not a textural parameter? (Degree of Crystallinity, Density of Rock, Shape of Grains, Size of Grains)

Answer 33

Density of Rock

Question 34

This refers to the degree of uniformity of grain size

Answer 34

Sorting

Question 35

Which of the following minerals possesses metallic luster? (Barite, Azurite, Bornite, Garnierite)

Answer 35

Bornite

Question 36

The following are varieties of corundum except: (Emery, Sapphire, Ruby, Emerald)

Answer 36

Emerald

Question 37

A crystal system defined by the presence of 3 unequal axes all perpendicular to each other

Answer 37

Orthorhombic

Question 38

What suffix signifies a metamorphic feature developed during metamorphism, unlike relict feature

Answer 38

Blastic

Question 39

What is the parallel alignment of linear elements of the fabric of metamorphic rocks whing? the schistosity?

Answer 39

Schiller

Question 40

The oldest intrusive in the Philippines

Answer 40

Lutopan Diorite

Question 41

First book that gives an account on mining and minerals

Answer 41

De Re Metallica

Question 42

Cavities formed in lavas due to expanding gases are known as:

Answer 42

Vesicles

Question 43

A crystal system where the three crystallographic axes are equal in length at 1 point and intersect at right angles to each other:

Answer 43

Isometric

Question 44

The following are not minerals except: (Pearl, Cubic Zirconia, Coal, Ice)

Answer 44

Ice

Question 45

Of the following, which is not an evaporate? (Gypsum, Rock Salt, Anhydrite, Caliche, Phosphorite)

Answer 45

Phosphorite?

Question 46

Wind deposits of largely silt and some clay are:

Answer 46

Loess

Question 47

The color index of an igneous rock expresses its content of

Answer 47

Silica

Question 48

A texture is called ______ if the crystals are so minute that they are not distinguishable even under the microscope.

Answer 48

Cryptocrystalline

Question 49

A process that involves partial melting of the original rock to produce a felsic melt, which would then migrate and crystallize in pods and layers in the metamorphic rock

Answer 49

Migmatization

Question 50

A type of sandstone with more than 50% matrix material

Answer 50

Greywacke