4.15.F - Lesson Review: Minerals and Igneous Rocks

Question 1

All rocks are made of ___________________.
minerals
layers
mixtures
volcanic ash
sand
soil

Answer 1

minerals

Question 2

What happens when magma cools slowly in mineral formation?
Microscopic crystals will form.
Crystals will break apart.
Crystals will form a smooth texture.
Large crystal grains will form.

Answer 2

Large crystal grains will form.

Question 3

What happens when magma cools rapidly in mineral formation?
Crystals will form a coarse texture.
Large crystal grains will form.
Crystals will break apart.
Microscopic crystals will form.

Answer 3

Microscopic crystals will form.

Question 4

Some minerals are made out of ____________ element(s), called ___________ element(s).
three, carbon
one, native
one, carbon
two, carbon
one, singular
two, native

Answer 4

one, native

Question 5

What is the softest mineral on the Moh’s hardness scale?
Quartz
Calcite
Diamond
Graphite
Sulfur
Talc

Answer 5

Talc

Question 6

What mineral can be identified by radioactivity?
Titanium
Silver
Copper
Carbon
Uranium
Gold

Answer 6

Uranium

Question 7

Which test would you use if you wanted to see the color of the powder of a mineral?
Specific gravity
Luster
Color test
Acid test
Streak test
Hardness test

Answer 7

Streak test

Question 8

The specific gravity of most nonmetallic minerals is _____________________.
above 5
above 10
below 3
4
below 1
7

Answer 8

below 3

Question 9

The rock cycle indicates that each type of rock can __________.
form other rocks
all of the above
provide materials to make other rocks
be changed by forces at Earth’s surface

Answer 9

all of the above

Question 10

The “Father of Modern Day Geology” is known to be ___________________.
James Gandolfinni
James Hutton
James Horton
James Spellman

Answer 10

James Hutton

Question 11

Which type of rock forms as a result of the weathering process, either by compaction and cementation of rock mineral fragments or the precipitation of dissolved minerals?
Igneous rock
Sedimentary rock
Metamorphic rock

Answer 11

Sedimentary rock

Question 12

When melting of a metamorphic rock occurs, it changes into ______.

Answer 12

Your Answer:
magma

Question 13

Where do plutonic rocks form?
While being ejected out of the volcano
At the surface of the Earth
In the Earth below ground
As pyroclastic rocks
On Pluto

Answer 13

In the Earth below ground

Question 14

Basaltic magma ____________________________. (You may use your charts.)
forms in rifts or oceanic hotspots
forms at subduction boundaries
is sometimes explosive
has the lowest temperature
is always explosive
contains high amounts of silica

Answer 14

forms in rifts or oceanic hotspots

Question 15

Very small crystals in an igneous rock show that it was formed ________________________.
deep in the surface of the Earth
in a short period of time
close to the surface of the Earth
in a long period of time
at a very high temperature

Answer 15

in a short period of time

Question 16

The amount of magnesium and iron ____________________________.
increases in lighter colored rocks
increases in mafic rocks
decreases in darker colored rock
increases in rocks that are high in silicon
decreases in rocks that are mafic

Answer 16

increases in mafic rocks

Question 17

Mafic igneous rocks contain about _______________________. (You may use your rock identification chart.)
60% silica
80% silica
100% silica
70% silica
30% silica
50% silica

Answer 17

50% silica

Question 18

Rhyolitic magma contains ________________. (You may use your charts)
60% silica, 4–6% gases
25% silica, 4–6% gases
>70% silica, 4–6% gases
50% silica, 4–6% gases
40% silica, 4–6% gases

Answer 18

> 70% silica, 4–6% gases

Question 19

What processes cause igneous rock to form?
Pressure and solidification
Deposition and erosion
Heat and pressure
Sedimentation and compaction
Melting and solidification
Compaction and heat

Question 20

Granite is formed when magma cools slowly. Granite is a (an) ____________. (You may use your rock charts.)
intrusive igneous rock
non-foliated metamorphic rock
extrusive igneous rock
bioclastic sedimentary rock
foliated metamorphic rock
clastic sedimentary rock

Answer 20

intrusive igneous rock

Question 21

What are the two most abundant elements in the Earth’s crust?
Carbon dioxide and argon
Gold and silver
Oxygen and nitrogen
Oxygen and silicon
Oxygen and carbon dioxide
Silicon and carbon dioxide

Answer 21

Oxygen and silicon

Question 22

How many elements are found in most minerals?
1
20
2
3
6

Answer 22

6

Question 23

Computers have the mineral _______________ in their motherboard.
halite
garnet
iron
gypsum
calcite
silica

Answer 23

silica

Question 24

Luster refers to the ____________________________.
the different kinds of elements that make up the mineral
the color of the powder on a streak plate
the arrangement of the atoms or ions in a mineral
the shine of the color of the mineral
the way the mineral reflects light
ability of a mineral to hold water

Answer 24

the way the mineral reflects light

Question 25

The mineral that shows conchoidal fracture is __________________________. halite calcite gypsum fluorite quartz mica

Answer 25

quartz

Question 26

A radioactive mineral ___________________________. glows under a black light gives off subatomic particles is hot to the touch tastes salty glows after the black light is shut off splits light rays in two parts

Answer 26

gives off subatomic particles

Question 27

The ______________ shows how one rock type changes into another rock type. rock cycle cooling process formation of crystals melting process

Answer 27

rock cycle

Question 28

Sedimentary rocks are changed into sediment by____________. compaction weathering melting cementation

Answer 28

weathering

Question 29

What are the three basic types of rock groups?

Answer 29

Your Answer: Igneous, Sedimentary, Metamorphic

Question 30

Of these igneous rocks, which would contain the largest crystals? (You may use your rock charts.) Pumice Diorite Basalt Andesite Rhyolite Obsidian

Answer 30

Diorite

Question 31

Which is an example of an extrusive igneous rock? (You may use your igneous rock identification chart.) Diorite Gabbro Granite Pegmatite Scoria

Answer 31

Scoria

Question 32

Which of the following causes the melting temperature of magma to increase? (You may use your identification charts.) Increasing the magnesium content Increasing the potassium content Decreasing the oxygen content Increasing silica content Decreasing the iron content Decreasing the depth of the magma

Answer 32

Increasing the magnesium content

Question 33

Pumice is an example of a(n) ______________. (You may use your charts.) extrusive, coarse-grained igneous rock intrusive, coarse-grained igneous rock extrusive, vesicular igneous rock plutonic, fine-grained igneous rock phaneritic, coarse-grained igneous rock porphryitic, fine-grained igneous rock

Answer 33

extrusive, vesicular igneous rock

Question 34

Obsidian is unusual in that ___________________. (You may use your identification charts.) it is phaneritic it is vesicular it is high in magnesium and iron it is plutonic it is always a mafic rock even though it is dark, it is considered a felsic rock due to the silica and quartz content

Answer 34

even though it is dark, it is considered a felsic rock due to the silica and quartz content