Igneous Rocks
Practice Test
1.
Graphs and charts of data can be used for __________.
a.
deciding on a control
b.
testing the independent variable
c.
formation of a hypothesis
d.
data analysis
2.
The attraction of two atoms for a shared pair of electrons that hold the atoms together is called __________.
a.
a covalent bond
b.
a chemical reaction
c.
an ionic bond
d.
a compound
3.
What is the correct atomic composition of quartz?
a.
two silica atoms
b.
two silica atoms and one iron atom
c.
two oxygen atoms and one silica atom
d.
four atoms of silica and oxygen each
4.
What is an example of an SI unit of area?
a.
cm
3
b.
g/mL
c.
m
2
d.
cm
5.
In an experiment, the results show a conclusion contrary to the hypothesis. What does this mean?
a.
The analysis was incorrect.
b.
The experiment was bad.
c.
The hypothesis must be reevluated.
d.
The control was not done properly.
6.
How does the satellite Topex/Poseidon map ocean features?
a.
X rays
b.
radar
c.
ultraviolet rays
d.
visible light
7.
According to the figure showing a limited view of Bowen's reaction series, what type of mineral causes a continuous reaction series?
a.
calcium
b.
magnesium
c.
sodium
d.
iron
8.
The equator circles Earth __________.
a.
at the same location as the International Date Line
b.
around Earth at 66°N
c.
between the north and south poles
d.
halfway between the north and south poles
9.
According to the figure, what type of rocks can include quartz?
a.
basalt
b.
peridotite
c.
gabbro
d.
granite
10.
If a mineral breaks along distinct planes, it is said to have __________.
a.
cleavage
b.
a dull luster
c.
a high specific gravity
d.
fracture
11.
What is the electromagnetic spectrum?
a.
frequencies measured by satellites
b.
the arrangement of electromagnetic radiation
c.
energy emitted from Earth
d.
visible light
12.
What is the best method to show a change in volume over time?
a.
law
b.
theory
c.
graph
d.
model
13.
What determines the chemical behavior of an element?
a.
its isotopes
b.
the size of the nucleus
c.
the number of energy levels
d.
the valence electrons
14.
An igneous rock with two distinct grain sizes has a __________ texture.
a.
felsic
b.
porphyritic
c.
coarse-grained
d.
fine-grained
15.
According to the table, what is a characteristic of metallic minerals?
Table 2
Minerals with Metallic Luster
Mineral
(Formula)
Color
Streak
Hardness
Specific Gravity
Crystal System
Breakage pattern
Uses and Other Properties
Bornite
(Cu
5
FeS
2)
bronze, tarnishes to dark blue purple
gray-black
3
4.9-5.4
tetragonal
uneven fracture
source of copper
called "peacock ore" Because of the purple shine when it tarnishes
Chalcopyrite
(CuFeS
2
)
brassy to golden yellow
greenish black
3.5-4
4.2
tetragonal
uneven fracture
main ore of copper
Chromite
(FeCr
2
O
4
)
black or Brown
brown to Black
5.5
4.6
cubic
irregular fracture
ore of chromium, stainless steel, metallurgical bricks
Copper
(Cu)
copper red
copper red
3
8.5 -9
cubic
hackly
coins, pipes, gutters, wire, cooking utensils, jewelry, decorative plaques; malleable and ductile
Galena (PbS)
gray
gray to black
2.5
7.5
cubic
cubic cleavage perfect
source of lead, used in pipes, shields for X-rays, fishing equipment sinkers
Gold
(Au)
pale to golden yellow
yellow
2.5-3
19.3
cubic
hackly
jewelry, money, gold leaf, filling for teeth, medicines, does not tarnish
Graphite
(C)
black to gray
black to gray
1-2
2.3
hexagonal
basal cleavage (scales)
pencil lead, lubricants for locks, rods to control some small nuclear reactions, battery poles
Hematite
(Specular)
(fe
2
O
3
)
Black or reddish brown
red or reddish brown
6
5.3
hexagonal
irregular fracture
source of iron; roasted ina blast furnace, converted into pig iron, made into steel
Magnetite
(fe
3
O
4
)
black
black
6
5.2
cubic
conchodial fracture
source of iron, naturally magnetic, called lodestone
Pyrite
(FeS
2
)
light, brassy yellow
greenish black
6.5
5.0
cubic
uneven fracture
source of iron, [CDATA["]]fool's gold,[CDATA["]] alters to limonite
Pyrrhotite
(Fe
1-x
S
)*
*contains one less atom of Fe than S
bronze
gray-black
4
4.6
hexagonal
uneven fracture
an ore of iron and sulfur; may be magnetic
Silver(Ag)
silvery white, tarnishes to black
light gray to silver
2.5
10-12
cubic
hackly
coins, filling for teeth, jewelry, silver plate, wires; malleable and ductile
a.
low hardness value
b.
gray, green, brown, or red streak
c.
no crystalline structure
d.
colorless streak
16.
A mineral is __________ if it can be mined for profit.
a.
an igneous rock
b.
a crystal
c.
a rock
d.
an ore
17.
According to the Table, which city is farthest north?
City
Latitude
Longitude
Cape Town, South Africa
34°S
18°N
Pontianik, Indonesia
0°
109°E
Nome, Alaska
65°N
165°W
Quito Ecuador
0°
79°W
Stockholm, Sweden
59°N
18°E
Wellington, New Zealand
41°S
175°E
a.
Cape Town, South Africa
b.
Wellington, New Zealand
c.
Pontianak, Indonesia
d.
Stockholm, Sweden
18.
What is a substance that cannot be broken down into simpler substances with all the characteristics of the substance?
a.
matter
b.
a gas
c.
a solid
d.
an element
19.
Extrusive rocks have fine-grained textures because __________.
a.
they are derived from volcanoes
b.
they cooled inside Earth's crust
c.
they cooled slow
d.
they cooled quickly
20.
What is the attractive force between two particles of opposite charge called?
a.
an ionic bond
b.
a compound force
c.
a covalent bond
d.
an isotope
