Test 3 (Nine-Weeks Exam), Ch. 1 - 3 Flashcards

1
Q

The largest group of minerals, which compose over 90% of the earth’s crust, are the

A

silicates

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2
Q

The layer of solid rock below the soil is

A

bedrock

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3
Q

The rarest, most durable, and most beautiful minerals are

A

precious stones

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4
Q

Substances that are found naturally in the earth and have a crystalline structure are

A

minerals

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5
Q

A theory that has never been proven false is a

A

law

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6
Q

chemical sediments that result from the evaporation of water are

A

evaporites

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7
Q

a well-known chemical sedimentary rock is

A

limestone

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8
Q

a soil substance composed of decayed organisms’ particles is

A

humus

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9
Q

The most famous measure of earthquake strength, which rates earthquakes on a scale of 1 to 10 is the

A

Richter magnitude scale

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10
Q

Rocks that have a smooth, glasslike texture are

A

amorphous

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11
Q

Which earthquake zone includes the San Andreas Fault?

A

circum-Pacific belt

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12
Q

The metal that is more valuable than gold or silver is

A

platinum

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13
Q

Hard, round structures that form when minerals settle out of water and crystallize around a sand grain or other mineral fragment are called

A

concretions

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14
Q

The measure of the pull of gravity on an object is

A

weight

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15
Q

The group on which a test is performed is called the

A

experimental group

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16
Q

A volcano that will probably not erupt again is called

A

extinct

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17
Q

Beryl that has a deep green color is

A

emerald

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18
Q

The 3rd step in the scientific method is

A

formulate a hypothesis

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19
Q

The inner core of the earth is thought to be

A

solid

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20
Q

A metal mixture of iron and carbon is

A

steel

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21
Q

Brass is an alloy of ___ and zinc.

A

copper

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22
Q

Mining that uses a rotating drum that travels down a long track while grinding coal is called ____ mining.

A

longwall

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23
Q

Crystals are generally characterized by many flat surfaces called

A

faces

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24
Q

The most basic unit of matter is the

A

atom

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25
About 80% of the world's earthquakes occur in
the circum-Pacific belt
26
The breakdown of organisms is known as
decomposition
27
Any piece of solid volcanic ejecta is a
pyroclast
28
type of rock formed when magma solidifies
igneous rock
29
type of rock formed when deposits of sand and mineral fragments are cemented together
sedimentary rock
30
type of rock formed when preexisting rocks are altered by heat or pressure
metamorphic rock
31
any mineral that contains a valuable metallic element
ore
32
The branch of geology that deals with the identification and classification of minerals is
mineralogy
33
the bending or buckling of rocks under great force produces a
fold
34
Aluminum is refined from the common mineral
bauxite
35
The most abundant metal in the earth's crust is
aluminum
36
The type of soil that contains a mixture of sand, silt, clay, and humus is
loam
37
The change of one type of rock into a new type of rock is
metamorphism
38
The number that compares an object's density to the density of water is called
specific gravity
39
The study of soil is
pedology
40
The hardest naturally occurring known substance is
diamond
41
A mineral that remains glowing after being exposed to ultraviolet light and then placed in the dark exhibits
phosphorescence
42
the most common element in the earth's crust is
oxygen
43
A "self pumping" well is an
artesian well
44
A substance with a pH of 10 would be
basic
45
the most common of all igneous rocks
basalt
46
igneous rock with a smooth, glasslike texture; known as "volcanic glass"
obsidian
47
the most common sedimentary rock
shale
48
rock that consists of smooth pebbles embedded in hardened sand or clay
conglomerate rock
49
an organic sedimentary rock that is also called a fossil fuel
coal
50
What term refers to the way light is reflected from the surface of a mineral crystal?
luster
51
What do mineralogists call an element that occurs naturally in its pure form, uncombined with other elements?
native element
52
What is a single layer of sedimentary rock called?
stratum
53
What nutrient makes a plant's fruits "firm up" properly?
phosphorus
54
What is another name for a bar of refined gold?
bullion
55
What is an alloy of iron, carbon, and nickel or chromium?
stainless steel
56
What are geometric structures composed of atoms or molecules in an orderly arrangement?
crystals
57
Name the narrow zone of active volcanoes that nearly encircles the Pacific basin.
Ring of Fire
58
What type of lava has a smooth texture with a "ropy" appearance?
pahoehoe
59
What mineral test leaves a line of powder on a plate?
streak test
60
What are the upper layers of the ground stripped away by surface mining called?
overburden
61
What is the name for a substance that is composed of only one type of atom?
element
62
earthquake waves that vibrate at right angles to the direction of wave travel
S waves
63
point at which an earthquake begins
focus
64
weak earthquake
tremor
65
fastest earthquake waves
P waves
66
term for small earthquakes that follow an earthquake for days or even months
aftershock
67
rocks on either side of a fault spring back to a position of little or no strain
elastic rebound
68
giant sea waves
tsunamis
69
instrument that records and studies the vibrations from an earthquake
seismograph
70
point on the earth's surface directly above where an earthquake began
epicenter