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QUESTION

Question 5 ___________ minerals are dark-colored because they contain _____________. Mafic; iron and/or magnesium Mafic; calcium, sodium, or potassium Felsic; calcium, sodium, or potassium Felsic

Question 5 

___________ minerals are dark-colored because they contain _____________. 

 Mafic; iron and/or magnesium 

Mafic; calcium, sodium, or potassium

 Felsic; calcium, sodium, or potassium

Felsic; iron and/or magnesium

Question 6 

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

 naturally occuring

 multiple chemical compositions

 crystal structure

inorganic in origin

Question 7 

What are the 2 most common elements in minerals we find in the earth's crust? 

Oxygen and Silicon 

 Carbon and Nitrogen 

Iron and Silicon 

Iron and Magnesium

Question 8 

What property would you use to distinguish between augite and hornblende? 

 hardness

 cleavage

 crystal shape

 color

Question 9 

During mineral identification process, geologists can utilize color of mineral to find out whether it is 

 Mafic or Felsic 

Salted or Unsalted 

Metallic or Non metallic

 Magnetite or Hematite

Question 10 

These minerals are often similar in color but can be distinguished by their ____ streak color. 

 Magnesite- White, Magnetite- Black 

Hematite- Red, Magnesite- White 

Halite- White, Magnetite- Black 

Hematite- Red, Magnetite- Black

Question 11 

What are the best properties for distinguishing the black minerals biotite and hornblende apart?

 cleavage and streak 

hardness and cleavage

 hardness and color 

color and streak

Question 12 

Multiple answer question !

Regarding crystal size of igneous rocks, which statements  are true

Slow rate promotes growth of fewer but larger crystals 

Very fast cooling forms glass

Very fast cooling forms the biggest crystals

 Fast rate forms many small crystals

Question 13

Which mineral group make up the majority of the Earth’s crust? 

Sulphide  

Silicate 

Halide 

Phosphate

Question 14 

 What is the most important use of apatite?  

ceramic tile 

gemstone 

dog food

 phosphorous for fertilizer

Question 15 

Quartz and feldspar share a similar ____________ silicate structure. 

single-chain 

sheet 

double-chain 

framework

Question 16 

Which of the following minerals has 3 good cleavages that are NOT at 90 degrees? 

fluorite

 dolomite

 galena 

halite

Question 17 

 When a mineral breaks, it often does so along its plane or planes, which is known as 

 luster.

 cleavage.

 hardness.

 streak.

Question 18 

The following process results in which type of rocks?

Step 1. Sedimentary rocks melt underneath the ground due to high temperature and produce magma.

Step 2. This magma rises and reaches the near surface (still under the ground).

Step 3. The magma cools down and forms a rock.

 Sandstone

 Sedimentary 

Rhyolite 

Igneous 

Metamorphic

Question 19 1 pts

The following process results in which type of rocks?

Step 1. Metamorphic rocks melt underneath the ground due to high temperature and produce magma.

Step 2. This magma rises and reaches the near surface (still under the ground).

Step 3. The magma cools down and forms a rock.

 Igneous

 Sedimentary

 Rhyolite 

Sandstone

 Metamorphic

Question 20 

There are two main forces which are involved in constantly changing the rocks from one form (igneous or sedimentary or metamorphic)  to another. Among the following options please find the above mentioned forces. 

[choose two correct answers]

 The hydrological cycle 

Wind 

Cosmic rays

 Earth's internal heat

 Gravitational force

Question 21 

Magma that reaches the surface (extrudes onto the surface) is called ______? 

granite

 quartz

 pumice

 lava

Question 22 

 Extremely coarse crystalline igneous texture is called _______?  pyritic

 pegmatitic

 pyroclastic

 phenocrystallic

Question 23 

Which of the following gases is NOT commonly found in magma and lava? 

carbon monoxide (CO)

 sulfur dioxide (SO2) 

water vapor (H2O)

 carbon dioxide (CO2)

Question 24 

Large amounts of iron and magnesium elements would most likely be present in ___________ igneous rocks? 

 rhyolitic and granite

 mafic or ultramafic 

felsic and mafic

 intermediate or felsic

Question 25 

Aphanitic igneous rocks form when magma cools _________________? 

slowly underground

 faily rapidly on the surface of the ground 

slowly on the surface of the ground

 rapidly underground

Question 26 

 A porphyritic rock contains both ________ and __________.  phenocrysts; groundmass 

phenocrysts; vesicles

 vesicles; crystals

 pegmatites; groundmass

Question 27 

 Which of the following ARE examples of phaneritic igneous rocks? 

 diorite and andesite

 basalt and gabbro 

granite and rhyolite 

granite and diorite

Question 28

____________ melting takes place with in the Earth when a body of rock is held at approximately the same temperature but the pressure is reduced.   

Flux 

Decompression

 Plume

 Heated

Question 29 

 What is an aphanitic texture in igneous rocks? 

a coarse-grained texture in which all crystals are visible to thenaked eye 

a texture in which some crystals are bigger than others, but all are visible to the naked eye 

a glassy texture in which all crystals are visible to the naked eye 

a fine-grained texture in which crystals are present, but generally not visible to the naked eye

Question 30 

 What type(s) of igneous rock(s) is/are most likely to form along an oceanic-continental type of convergent plate boundary? 

 granitic and andesitic

 granitic and basaltic

 andesitic and basaltic

 granitic

Question 31 

Igneous rocks that solidify or cool on the Earth's surface are called ____? 

extrusive or intrusive

 intrusive or plutonic 

extrusive or plutonic 

extrusive or volcanic

Question 32 

Which of the following is NOT an example of a phaneritic igneous rock? 

 diorite 

rhyolite

 gabbro

granite

Question 33 

Mafic igneous rocks melt at ____________ temperatures than felsic igneous rocks? 

higher

 lower or higher

 lower

 the same

Question 34 

 Which of the following rocks are igneous? 

 basalt and sandstone 

sandstone and limestone

 granite and sandstone

 granite and basalt

Question 35 

Where can decompression melting be found? Multiple answers 

divergent plate boundaries 

mantle plumes

 active margins 

convergent boundaries

Question 36

You were given a rock, and you were told that  rock has phaneritic texture and the following composition:

Quartz: 25% 

K-feldspar: 25% 

Plagioclase feldspar : 45%

Biotite: 10% . Which rock is this? 

 Shale 

Diorite

 Granite

 Basalt

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