Volcanic Activity
Practice Test
1.
What letter in the figure depicts the possible beginning of plutons like dikes and sills?
SC.D.1.4.2
a.
B
b.
A
c.
C
d.
none of the above
2.
A __________ is a large intrusive igneous rock body that covers at least 100 square km.
SC.D.1.4.2
a.
dike
b.
laccolith
c.
batholith
d.
sill
3.
An igneous rock with two distinct grain sizes has a __________ texture.
SC.D.1.4.2
a.
felsic
b.
porphyritic
c.
fine-grained
d.
coarse-grained
4.
When a divergent plate boundary forms on continents, a __________ forms.
SC.D.1.4.2
a.
crater
b.
rift valley
c.
mid-continent ridge
d.
volcano
5.
A __________ is a device that can detect changes in the strength of the magnetic field.
SC.D.1.4.2
a.
magnetometer
b.
GPS
c.
satellite
d.
sonar
6.
A place where two plates slide laterally past each other is called a __________.
SC.D.1.4.2
a.
divergent boundary
b.
transform boundary
c.
mid-ocean ridge
d.
convergent boundary
7.
Volcanoes that form far from plate boundaries form as the result of __________.
SC.D.1.4.2
a.
divergent plate boundaries
b.
volcanic bombs
c.
cinder cones
d.
hot spots
8.
The supercontinent from Wegener's theory of continental drift is called __________.
SC.D.1.4.3
a.
Pangaea
b.
Laurasia
c.
North America
d.
Gondwanaland
9.
How are the convection currents set in motion?
SC.D.1.4.2
a.
slab push
b.
spreading mid-ocean ridges
c.
the heat from radioactive decay
d.
slab push and ridge pull
10.
What is the name of Alfred Wegener's hypothesis about moving landmasses?
SC.D.1.4.3
a.
continental movement
b.
seafloor spreading
c.
continental drift
d.
plate tectonics
11.
Which is not a compositional classification of a magma?
SC.D.1.4.2
a.
rhyolitic
b.
andesitic
c.
phaneritic
d.
basaltic
12.
What is the study of Earth's magnetic record?
SC.D.1.4.3
a.
paleontology
b.
magnetometer
c.
paleomagnetism
d.
paleogeography
13.
What is thought to be the driving mechanism of plate movement?
SC.D.1.4.2
a.
conduction of heat in the mantle
b.
continental drifting
c.
volcanoes
d.
convection currents in the mantle
14.
__________ are submerged basaltic volcanoes more than 1 km high.
SC.D.1.4.2
a.
Submarine canyons
b.
Seamounts
c.
Fracture zones
d.
Shelf breaks
15.
What is the temperature change in Earth's crust called?
SC.D.1.4.2
a.
radioactive decay
b.
hydrothermal gradient
c.
geothermal gradient
d.
thermal energy
16.
__________ is the internal resistance to flow of a liquid.
SC.D.1.4.2
a.
Gravity
b.
Weight
c.
Viscosity
d.
Specific gravity
17.
When magma reaches Earth's surface it is called __________.
SC.D.1.4.2
a.
lava
b.
a batholith
c.
intrusive
d.
rock
18.
How is a volcanic crater connected to a magma chamber?
SC.D.1.4.2
a.
by tephra
b.
by a vent
c.
by a hot spot
d.
by a sill
19.
What is the shallowest part of the continental margin calle
SC.D.1.4.2
a.
the continental rise
b.
a submarine canyon
c.
the continental shelf
d.
the shelf break
